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Quan K, Qin Y, Chen K, Liu M, Zhang X, Liu P, van der Mei HC, Busscher HJ, Zhang Z. Lethal puncturing of planktonic Gram-positive and Gram-negative bacteria by magnetically-rotated silica hexapods. J Colloid Interface Sci 2024; 664:275-283. [PMID: 38471190 DOI: 10.1016/j.jcis.2024.03.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/30/2024] [Accepted: 03/03/2024] [Indexed: 03/14/2024]
Abstract
Planktonic bacterial presence in many industrial and environmental applications and personal health-care products is generally countered using antimicrobials. However, antimicrobial chemicals present an environmental threat, while emerging resistance reduces their efficacy. Suspended bacteria have no defense against mechanical attack. Therefore, we synthesized silica hexapods on an α-Fe2O3 core that can be magnetically-rotated to inflict lethal cell-wall-damage to planktonic Gram-negative and Gram-positive bacteria. Hexapods possessed 600 nm long nano-spikes, composed of SiO2, as shown by FTIR and XPS. Fluorescence staining revealed cell wall damage caused by rotating hexapods. This damage was accompanied by DNA/protein release and bacterial death that increased with increasing rotational frequency up to 500 rpm. Lethal puncturing was more extensive on Gram-negative bacteria than on Gram-positive bacteria, which have a thicker peptidoglycan layer with a higher Young's modulus. Simulations confirmed that cell-wall-puncturing occurs at lower nano-spike penetration levels in the cell walls of Gram-negative bacteria. This approach offers a new way to kill bacteria in suspension, not based on antimicrobial chemicals.
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Affiliation(s)
- Kecheng Quan
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China; School of Materials Science and Engineering, Peking University, Beijing 100871, PR China
| | - Yu Qin
- School of Materials Science and Engineering, Peking University, Beijing 100871, PR China
| | - Kai Chen
- School of Materials Science and Engineering, Peking University, Beijing 100871, PR China
| | - Miaomiao Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Xiaoliang Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Peng Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China
| | - Henny C van der Mei
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, 9713 AV Groningen, The Netherlands
| | - Henk J Busscher
- University of Groningen and University Medical Center Groningen, Department of Biomedical Engineering, 9713 AV Groningen, The Netherlands.
| | - Zexin Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, PR China.
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Deakin K, Savage G, Jones JS, Porter A, Muñoz-Pérez JP, Santillo D, Lewis C. Sea surface microplastics in the Galapagos: Grab samples reveal high concentrations of particles <200 μm in size. Sci Total Environ 2024; 923:171428. [PMID: 38438045 DOI: 10.1016/j.scitotenv.2024.171428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/29/2024] [Accepted: 02/29/2024] [Indexed: 03/06/2024]
Abstract
Plastic pollution in the oceans is increasing, yet most global sea surface data is collected using plankton nets which limits our knowledge of the smaller and more bioaccessible size fraction of microplastics (<5 mm). We sampled the biodiverse coastal waters of the Galapagos Island of San Cristobal, comparing two different microplastic sampling methodologies; 1 l whole seawater grab samples filtered to 1.2 μm and sea surface plankton tows with a net mesh size of 200 μm. Our data reveal high concentrations of microplastics in Galapagos coastal waters surrounding the urban area, averaging 11.5 ± 1.48 particles l-1, with a four-order of magnitude increase in microplastic abundance observed using grab sampling compared with 200 μm plankton nets. This increase was greater when including anthropogenic cellulose particles, averaging 19.8 ± 1.86 particles l-1. Microplastic and anthropogenic cellulose particles smaller than 200 μm comprised 44 % of the particles from grab samples, suggesting previous estimates of microplastic pollution based on plankton nets likely miss and therefore underestimate these smaller particles. The particle characteristics and distribution of these smaller particles points strongly to a local input of cellulosic fibres in addition to the microplastic particles transported longer distances via the Humbolt current found across the surface seawater of the Galapagos. Improving our understanding of particle characteristics and distributions to highlight likely local sources will facilitate the development of local mitigation and management plans to reduce the input and impacts of microplastics to marine species, not just in the Galapagos but globally.
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Affiliation(s)
- Katie Deakin
- Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter EX4 4QD, UK
| | - Georgie Savage
- Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter EX4 4QD, UK
| | - Jen S Jones
- Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter EX4 4QD, UK; Galapagos Conservation Trust, 7-14 Great Dover Street, London SE1 4YR, UK
| | - Adam Porter
- Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter EX4 4QD, UK
| | - Juan Pablo Muñoz-Pérez
- Colegio de Ciencias Biológicas y Ambientales (COCIBA), Universidad San Francisco de Quito USFQ, Quito, Ecuador; School of Science, Technology and Engineering, University of the Sunshine Coast UniSC, Hervey Bay, QLD, Australia
| | - David Santillo
- Greenpeace Research Laboratories, School of Biosciences, Innovation Centre Phase 2, University of Exeter, Exeter EX4 4RN, UK
| | - Ceri Lewis
- Biosciences, Faculty of Health and Life Sciences, University of Exeter, Exeter EX4 4QD, UK.
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Li S, Luo N, Li C, Mao S, Huang H. Diversity and distribution analysis of eukaryotic communities in the Xiangshan Bay, East China sea by metabarcoding approach. Mar Environ Res 2024; 197:106451. [PMID: 38492505 DOI: 10.1016/j.marenvres.2024.106451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 01/04/2024] [Accepted: 03/11/2024] [Indexed: 03/18/2024]
Abstract
Eukaryotic communities play an important role in the coastal ecosystem of Xiangshan Bay, a narrow semi-closed bay famous for fisheries and marine farming. However, information on the diversity and composition of eukaryotic communities in Xiangshan Bay remains unclear. In this study, the metabarcoding approach was utilized to comprehensively investigate the eukaryotic plankton community structure and dominant taxa, particularly eukaryotic microalgae, in the Xiangshan Bay over a period of four months in 2018. The results showed that the three major phyla were Arthropoda, Chlorophyta, and Bacillariophyta. The richness indices revealed that species richness peaked in February and was at its lowest in May. Diversity indices showed that the samples collected in May had the lowest diversity. Centropages was detected in the samples of all months, however, its highest dominance was observed in the samples collected in February. In addition, compared to other months, a greater proportion of eukaryotic microalgae was witnessed in March. The three eukaryotic algae with highest abundances in March were Cyclotella, Prorocentrum, and Thalassiosira. Moreover, high diversity of pico-sized (0.2-2.0 μm) phytoplankton (which are often easily missed by microscopy) was discovered in this study by using metabarcoding approach. This study highlights the strength and significance of the metabarcoding approach to uncover a large number of eukaryotic species which remains undetectable during application of conventional approaches. The findings of this study reveals that the eukaryotic community structure varies noticeably in both time and space throughout sampling period, with temperature being the most important environmental factor influencing these changes. This study lays a solid foundation to understand eukaryotic plankton composition, temporal and spatial dynamics and the distribution mechanism of eukaryotic plankton community in Xiangshan Bay, providing theoretical reference for further studies related to marine ecology.
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Affiliation(s)
- Shuangqing Li
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Ningjian Luo
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Chuang Li
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Shuoqian Mao
- Ningbo Institute of Oceanography, Ningbo, 315832, China.
| | - Hailong Huang
- School of Marine Sciences, Ningbo University, Ningbo, Zhejiang, 315211, China.
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Di Pane J, Bourdaud P, Horn S, Moreno HD, Meunier CL. Global change alters coastal plankton food webs by promoting the microbial loop: An inverse modelling and network analysis approach on a mesocosm experiment. Sci Total Environ 2024; 921:171272. [PMID: 38408676 DOI: 10.1016/j.scitotenv.2024.171272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 02/09/2024] [Accepted: 02/23/2024] [Indexed: 02/28/2024]
Abstract
Marine organisms are currently, and will continue to be, exposed to the simultaneous effects of multiple environmental changes. Plankton organisms form the base of pelagic marine food webs and are particularly sensitive to ecosystem changes. Thus, warming, acidification, and changes in dissolved nutrient concentrations have the potential to alter these assemblages, with consequences for the entire ecosystem. Despite the growing number of studies addressing the potential influence of multiple drivers on plankton, global change may also cause less obvious alterations to the networks of interactions among species. Using inverse analyses applied to data collected during a mesocosm experiment, we aimed to compare the ecological functioning of coastal plankton assemblages and the interactions within their food web under different global change scenarios. The experimental treatments were based on the RCP 6.0 and 8.5 scenarios developed by the IPCC, which were extended (ERCP) to integrate the future predicted changes in coastal water nutrient concentrations. Overall, we identified that the functioning of the plankton food web was rather similar in the Ambient and ERCP 6.0 scenarios, but substantially altered in the ERCP 8.5 scenario. Using food web modelling and ecological network analysis, we identified that global change strengthens the microbial loop, with a decrease of energy transfer efficiency to higher trophic levels. Microzooplankton responded as well by an increased degree of herbivory in their diet and represented, compared to mesozooplankton, by far the main top-down pressure on primary producers. We also observed that the organisation of the food web and its capacity to recycle carbon was higher under the ERCP 8.5 scenario, but flow diversity and carbon path length were significantly reduced, illustrating an increased food web stability at the expense of diversity. Here, we provide evidence that if global change goes beyond the ERCP 6.0 scenario, coastal ecosystem functioning will be subjected to dramatic changes.
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Affiliation(s)
- Julien Di Pane
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Biologische Anstalt Helgoland, Helgoland, Germany; EDF R&D, LNHE - Laboratoire National d'Hydraulique et Environnement, Chatou 78400, France.
| | - Pierre Bourdaud
- DECOD (Ecosystem Dynamics and Sustainability), IFREMER, Institut Agro, INRAE, F-44311 Nantes, France
| | - Sabine Horn
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Wadden Sea Station, Sylt, Germany
| | - Hugo Duarte Moreno
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Biologische Anstalt Helgoland, Helgoland, Germany
| | - Cédric Léo Meunier
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Biologische Anstalt Helgoland, Helgoland, Germany
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de la Mata Moratilla S, Casado Angulo S, Gómez-Casanova N, Copa-Patiño JL, Heredero-Bermejo I, de la Mata FJ, García-Gallego S. Zinc(II) Iminopyridine Complexes as Antibacterial Agents: A Structure-to-Activity Study. Int J Mol Sci 2024; 25:4011. [PMID: 38612821 PMCID: PMC11012978 DOI: 10.3390/ijms25074011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024] Open
Abstract
Antibiotic resistance is currently a global health emergency. Metallodrugs, especially metal coordination complexes, comprise a broad variety of candidates to combat antibacterial infections. In this work, we designed a new family of Schiff base zinc(II) complexes with iminopyridine as an organic ligand and different inorganic ligands: chloride, nitrate, and acetate. The antibacterial effect of the Zn(II) complexes was studied against planktonic bacterial cells of Staphylococcus aureus (Gram-positive) and Escherichia coli (Gram-negative) strains. The results showed a moderate biocide activity in both types of planktonic bacteria, which arises from the metal complexation to the Schiff base ligand. Importantly, we confirmed the crucial effect of the metal, with Zn(II) improving the activity of Cu(II) counterparts previously reported. On the other hand, the impact of the inorganic ligands was not significant for the antibacterial effect but was relevant for the complex solubility. Finally, as proof of concept of topical antibacterial formulation, we formulated an emulsion containing the most lipophilic Zn(II) complex and confirmed a sustained release for 24 h in a vertical cell diffusion assay. The promising activity of iminopyridine Zn(II) complexes is potentially worth exploring in more detailed studies.
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Affiliation(s)
- Silvia de la Mata Moratilla
- University of Alcalá, Faculty of Sciences, Department of Organic and Inorganic Chemistry and Research Institute in Chemistry “Andrés M. del Río” (IQAR), 28805 Alcalá de Henares, Spain; (S.d.l.M.M.); (S.C.A.); (F.J.d.l.M.)
| | - Sandra Casado Angulo
- University of Alcalá, Faculty of Sciences, Department of Organic and Inorganic Chemistry and Research Institute in Chemistry “Andrés M. del Río” (IQAR), 28805 Alcalá de Henares, Spain; (S.d.l.M.M.); (S.C.A.); (F.J.d.l.M.)
| | - Natalia Gómez-Casanova
- University of Alcalá, Faculty of Pharmacy, Department of Biomedicine and Biotechnology, 28805 Alcalá de Henares, Spain; (N.G.-C.); (J.L.C.-P.)
| | - José Luis Copa-Patiño
- University of Alcalá, Faculty of Pharmacy, Department of Biomedicine and Biotechnology, 28805 Alcalá de Henares, Spain; (N.G.-C.); (J.L.C.-P.)
| | - Irene Heredero-Bermejo
- University of Alcalá, Faculty of Pharmacy, Department of Biomedicine and Biotechnology, 28805 Alcalá de Henares, Spain; (N.G.-C.); (J.L.C.-P.)
| | - Francisco Javier de la Mata
- University of Alcalá, Faculty of Sciences, Department of Organic and Inorganic Chemistry and Research Institute in Chemistry “Andrés M. del Río” (IQAR), 28805 Alcalá de Henares, Spain; (S.d.l.M.M.); (S.C.A.); (F.J.d.l.M.)
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), 28034 Madrid, Spain
| | - Sandra García-Gallego
- University of Alcalá, Faculty of Sciences, Department of Organic and Inorganic Chemistry and Research Institute in Chemistry “Andrés M. del Río” (IQAR), 28805 Alcalá de Henares, Spain; (S.d.l.M.M.); (S.C.A.); (F.J.d.l.M.)
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 28029 Madrid, Spain
- Institute Ramón y Cajal for Health Research (IRYCIS), 28034 Madrid, Spain
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6
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Fu Y, Qu Z, Wang Y, Sun P, Jiao N, Xu D. Biogeographical and biodiversity patterns of planktonic microeukaryotes along the tropical western to eastern Pacific Ocean transect revealed by metabarcoding. Microbiol Spectr 2024; 12:e0242423. [PMID: 38488393 DOI: 10.1128/spectrum.02424-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 03/02/2024] [Indexed: 04/06/2024] Open
Abstract
Microeukaryotic plankton (0.2-200 µm), which are morphologically and genetically highly diverse, play a crucial role in ocean productivity and carbon consumption. The Pacific Ocean (PO), one of the world's largest oligotrophic regions, remains largely unexplored in terms of the biogeography and biodiversity of microeukaryotes based on large-scale sampling. We investigated the horizontal distribution of microeukaryotes along a 16,000 km transect from the west to the east of the PO. The alpha diversity indices showed a distinct decreasing trend from west to east, which was highly correlated with water temperature. The microeukaryotic community, which was clustered into the western, central, and eastern PO groups, displayed a significant distance-decay relationship. Syndiniales, a lineage of parasitic dinoflagellates, was ubiquitously distributed along the transect and dominated the community in terms of both sequence and zero-radius operational taxonomic unit (ZOTU) proportions. The prevailing dominance of Syndiniales-affiliated ZOTUs and their close associations with dinoflagellates, diatoms, and radiolarians, as revealed by SparCC correlation analysis, suggested that parasitism may be an important trophic strategy in the surface waters of the PO. Geographical distance and temperature were the most important environmental factors that significantly correlated with community structure. Overall, our study sheds more light on the distribution pattern of both alpha and beta diversities of microeukaryotic communities and highlighted the importance of parasitisms by Syndiniales across the tropical PO.IMPORTANCEUnderstanding the biogeographical and biodiversity patterns of microeukaryotic communities is essential to comprehending their roles in biogeochemical cycling. In this study, planktonic microeukaryotes were collected along a west-to-east Pacific Ocean transect (ca. 16,000 km). Our study revealed that the alpha diversity indices were highly correlated with water temperature, and the microeukaryotic communities displayed a distinct geographical distance-driven pattern. The predominance of the parasitic dinoflagellate lineage Syndiniales and their close relationship with other microeukaryotic groups suggest that parasitism may be a crucial survival strategy for microeukaryotes in the surface waters of the Pacific Ocean. Our findings expand our understanding of the biodiversity and biogeographical pattern of microeukaryotes and highlight the significance of parasitic Syndiniales in the surface ocean.
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Affiliation(s)
- Yingjun Fu
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen, China
- Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China
| | - Zhishuai Qu
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
| | - Ying Wang
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Fujian Provincial Key Laboratory of Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Ping Sun
- Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, Fujian Provincial Key Laboratory of Coastal Ecology and Environmental Studies, College of the Environment and Ecology, Xiamen University, Xiamen, China
| | - Nianzhi Jiao
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen, China
- Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China
| | - Dapeng Xu
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen, China
- Fujian Key Laboratory of Marine Carbon Sequestration, Xiamen University, Xiamen, China
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Krek AV, Ulyanova MO, Krek EV, Bubnova ES, Danchenkov AR, Semenova AS, Dmitrieva OA, Gusev AA. Changes in coastal ecosystems affected by overburden dumping from amber open-cut mining on the Sambia Peninsula (Baltic Sea). Mar Pollut Bull 2024; 201:116180. [PMID: 38430677 DOI: 10.1016/j.marpolbul.2024.116180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/10/2024] [Accepted: 02/16/2024] [Indexed: 03/05/2024]
Abstract
The Sambia Peninsula (Kaliningrad region) is historically well known for its amber mining. The 2019 year was the last year of direct overburden disposal into the Baltic Sea as a part of technological amber mining process. The extremely high-suspended particulate matter concentrations during that disposal were recorded immediately after the discharge of significant volumes of pulp and reached 200 mg/L. The impact of pulp discharge had sequentially suppressed plankton communities development due to the high content of suspended solids and afterwards stimulated plankton development due to the glauconite infusion. Cladocera were the most sensitive group to the effects of suspended matter. According to the preliminary forecast, when the pulp discharge stops, the restoration of plankton communities may take from 1 to 2 seasons to 1 year for different groups. This is due to the timing of the removal of fine suspended particulate matter from sediments and the possibility of secondary entry during resuspension.
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Affiliation(s)
- A V Krek
- Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
| | - M O Ulyanova
- Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia.
| | - E V Krek
- Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
| | - E S Bubnova
- Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
| | - A R Danchenkov
- Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia
| | - A S Semenova
- Russian Federal Research Institute of Fisheries and Oceanography, Atlantic Branch (AtlantNIRO), Kaliningrad, Russia; Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Russia
| | - O A Dmitrieva
- Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia; Russian Federal Research Institute of Fisheries and Oceanography, Atlantic Branch (AtlantNIRO), Kaliningrad, Russia
| | - A A Gusev
- Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia; Russian Federal Research Institute of Fisheries and Oceanography, Atlantic Branch (AtlantNIRO), Kaliningrad, Russia
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Liu W, Bao Y, Li K, Yang N, He P, He C, Liu J. The diversity of planktonic bacteria driven by environmental factors in different mariculture areas in the East China Sea. Mar Pollut Bull 2024; 201:116136. [PMID: 38382319 DOI: 10.1016/j.marpolbul.2024.116136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 02/23/2024]
Abstract
Planktonic bacteria play a crucial role in sustaining the ecological balance of aquatic ecosystems. However, their seasonal variations in different aquaculture areas within the East China Sea, along with their correlation to environmental factors, have not been extensively explored. In this study, each area with 3 sample points were set up to represent the fish aquaculture area, shellfish aquaculture area and non-aquaculture area. In 2019, we undertook four marine surveys along the Xiasanhengshan uninhabited island, during which we gathered surface seawater samples for both physicochemical analysis and high-throughput sequencing. This allowed us to obtain data about the physicochemical properties and microbial composition in each surveyed region. A short-term eutrophication phenomenon was present in the sea, and the spatial and temporal distribution of planktonic bacteria differed based on the mariculture area. At the phylum level, Proteobacteria accounted for >50 % of the community abundance in winter, spring, and autumn, while Cyanobacteria accounted for >30 % of the community abundance in summer. Because Cyanobacteria blooms are likely in summer, the relationship between Cyanobacteria and environmental factors was studied. Redundancy analysis showed that Cyanobacteria were consistently positively correlated with phosphate. Eutrophication and abnormal proliferation of Cyanobacteria in the study area necessitate ameliorations in the mariculture structure. The variation of genus in Proteobacteria is consistent with that of eutrophication, so some genera in Proteobacteria have the potential to become biological indicator species.
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Affiliation(s)
- Wei Liu
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; Wenzhou Vocational College of Science and Technology, Wenzhou 325006, China
| | - Yanlin Bao
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China; Jiangsu Environmental Protection Group Co., Ltd, Nanjing 210036, China
| | - Kejun Li
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China
| | - Na Yang
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China
| | - Peimin He
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China.
| | - Chiquan He
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
| | - Jinlin Liu
- State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China.
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Zhao X, Wang J, Liu Q, Du W, Yang S, Cai P, Ni J. Multifunctionality promotes the prosperity of riverine planktonic diatoms in plateau. Environ Res 2024; 246:118148. [PMID: 38191040 DOI: 10.1016/j.envres.2024.118148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 12/20/2023] [Accepted: 01/05/2024] [Indexed: 01/10/2024]
Abstract
Interpreting the biogeographic distribution and underlying mechanisms of functional traits not only contributes to revealing the spatiotemporal dynamics of species biodiversity but also helps to maintain ecological stability during environmental variations. However, little is known about the functional profiles of diatom communities over large river systems. Herein, we provided the first blueprints about the spatiotemporal distributions and driving forces of functional traits for both planktonic and sedimentary diatoms over the 6030 km continuum of the Yangtze River, with the help of the high-throughput sequencing and functional identification. By investigating the 28 functional traits affiliated into five categories, we found that planktonic diatom functions showed clearer landform-heterogeneity patterns (ANOSIM R = 0.336) than sedimentary functions (ANOSIM R = 0.172) along the river, represented by life-forms and ecological-guilds prominent in water-plateau as well as cell-sizes and life-forms particularly in sediment-plateau. Planktonic diatom functions also displayed higher richness and network complexity in plateau (richness: 58.70 ± 9.30, network edges: 65) than in non-plateau regions (23.82 ± 13.16, 16), promoting the stability and robustness of diatom functions against the high-radiation and low-temperature plateau environment. Environmental selection (mainly exerted by PAR, UV, and Tw) played crucial roles in determining the functional variations of planktonic diatoms (explaining 80.5%) rather than sedimentary diatoms (14.5%) between plateau and non-plateau regions. Meanwhile, planktonic diatom traits within life-forms were identified to be well responsive to the ecological environment quality (r = 0.56-0.60, P < 0.001) in the Yangtze. This study provided comprehensive insights into the multifunctionality of diatoms and their responses to environmental disturbance and environment quality, which helps to develop effective strategies for maintaining ecological stability in changing river environments.
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Affiliation(s)
- Xiaohui Zhao
- School of Water Resources and Hydropower Engineering, Xi'an University of Technology, Xi'an, 710048, PR China
| | - Jiawen Wang
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, PR China; College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, 100871, PR China.
| | - Qingxiang Liu
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, 100871, PR China
| | - Wenran Du
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, PR China; College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, 100871, PR China
| | - Shanqing Yang
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, 100871, PR China
| | - Pinggui Cai
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, 518055, PR China; College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, 100871, PR China
| | - Jinren Ni
- College of Environmental Sciences and Engineering, Peking University, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, 100871, PR China
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10
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Shi Y, Wen T, Zhao F, Hu J. Bacteriostasis of nisin against planktonic and biofilm bacteria: Its mechanism and application. J Food Sci 2024; 89:1894-1916. [PMID: 38477236 DOI: 10.1111/1750-3841.17001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 01/27/2024] [Accepted: 02/09/2024] [Indexed: 03/14/2024]
Abstract
Food safety incidents caused by bacterial contamination have always been one of the public safety issues of social concern. Planktonic cells, viable but non-culturable (VBNC) cells, and biofilm cells of bacteria can coexist in food or food processing, posing more serious challenges to public health and safety by increasing bacterial survival and difficulty in detection. As a non-toxic, no side effect, and highly effective bacteriostatic substance, nisin has received wide attention from researchers. In this review, we summarized the species and biosynthesis of nisin, the effects of nisin alone or in combination with other treatments on planktonic and biofilm cells, and its applications in the fields of food, feed, and medicine by consulting numerous studies. Meanwhile, the mechanism of nisin on planktonic and biofilm cells was proposed based on existing researches. Nisin not only has antibacterial activity against most G+ bacteria but also exhibits a bacteriostatic effect on G- bacteria when combined with other antibacterial treatments. In addition to planktonic cells, nisin also has significant effects on bacterial cells in biofilms by changing the thickness, density, and composition of biofilms. Based on the three action processes of nisin on biofilms, we summarized the changes of bacteria in biofilms, including the causes of bacterial death and the formation of the VBNC state. We consider that research on the relationship between nisin and VBNC state should be strengthened.
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Affiliation(s)
- Ying Shi
- College of Food Science and Engineering, Jilin University, Changchun, P. R. China
| | - Tao Wen
- College of Food Science and Engineering, Jilin University, Changchun, P. R. China
| | - Feng Zhao
- College of Food Science and Engineering, Jilin University, Changchun, P. R. China
| | - Jia Hu
- College of Food Science and Engineering, Jilin University, Changchun, P. R. China
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11
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Wang T, Liu R, Huang G, Tian X, Zhang Y, He M, Wang C. Assembly dynamics of eukaryotic plankton and bacterioplankton in the Yangtze River estuary: A hybrid community perspective. Mar Environ Res 2024; 196:106414. [PMID: 38394975 DOI: 10.1016/j.marenvres.2024.106414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 02/09/2024] [Accepted: 02/17/2024] [Indexed: 02/25/2024]
Abstract
Estuaries, acting as transitional habitats receiving species introductions from both freshwater and marine sources, undergo significant impacts from global climate changes. Planktonic microorganisms contribute significantly to estuarine biodiversity and ecological stability. These microorganisms primarily fall into three groups: eukaryotic plankton, particle-associated bacteria, and free-living bacteria. Understanding the structural characteristics and interactions within these subcommunities is crucial for comprehending estuarine dynamics. We collected samples from three distinct locations (< 0.1 PSU, 6.6 PSU, and 19 PSU) within the Yangtze River estuary. Samples underwent analysis for physicochemical indicators, while microbial communities were subjected to 16S/18S rRNA amplicon sequencing. Additionally, simulated mixing experiments were conducted using samples of varying salinities. Estuary samples, combined with simulated experiments, were employed to collectively examine the structural characteristics and assembly processes of estuarine microbes. Our research highlights the considerable impact of phylogenetic classification on prokaryotic behavior in these communities. We observed a transition in assembly processes from primarily stochastic for particle-associated bacteria to a predominant influence of homogeneous selection as salinity increased. Particle-associated bacterial communities exhibited a greater influence of stochastic processes compared to free-living bacteria, showcasing higher stability in diversity. The variations in composition and structure of estuarine microbial subcommunities were influenced by diverse environmental factors. Particle-associated bacteria displayed elevated network characterization values and established closer interactions with eukaryotic plankton. Structural equation modeling (SEM) analysis revealed that free-living bacteria displayed a heightened sensitivity to environmental factors and exerted a more significant influence on assembly processes and network characteristics. Simulated mixing in these environments resulted in the loss of species with similar microbial taxonomic relationships. The functioning of bacterioplankton is influenced by salinity and the processes governing their assembly, particularly in relation to different living states. These findings significantly contribute to our understanding of the intricate interplay between prokaryotic and eukaryotic plankton microorganisms in highly dynamic environments, laying a robust foundation for further exploration into the ecological mechanisms governing microbial dynamics in estuaries.
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Affiliation(s)
- Tong Wang
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Ruiqing Liu
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Guolin Huang
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xin Tian
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Yaru Zhang
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - Meilin He
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Changhai Wang
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, China; Co-Innovation Center for Jiangsu Marine Bio-Industry Technology, Lianyungang, 222005, China
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12
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Špoljarić Maronić D, Žuna Pfeiffer T, Bek N, Štolfa Čamagajevac I, Galir Balkić A, Stević F, Maksimović I, Mihaljević M, Lončarić Z. Distribution of selenium: A case study of the Drava, Danube and associated aquatic biotopes. Chemosphere 2024; 354:141596. [PMID: 38484986 DOI: 10.1016/j.chemosphere.2024.141596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/27/2024] [Accepted: 02/29/2024] [Indexed: 03/18/2024]
Abstract
This paper presents the results of the research on the overall distribution of selenium (Se) in various aquatic compartments (water, sediment, plankton and macrophytes) at six selected sites of the Croatian part of the Drava and Danube rivers, the connected floodplain lake and the melioration channel system carried out in two sampling periods (flooding in June and the drought period in September). In addition, the physicochemical water properties, plankton composition and biomass were analysed. Our study revealed low mean Se contents in sediments and water, indicating Se deficiency in the studied freshwater systems. The physicochemical environment, including Se distribution, was primarily influenced by hydrology rather than site-specific biogeochemical and morphological characteristics. The flooding period was characterised by higher Se content in water and higher transparency, nitrate and total nitrogen concentrations than drought conditions. At the river sites, sediment Se content was the highest during the flood period, while at all other sites, higher concentrations were found during the drought, reaching the maximum in the lake. Although Se concentrations were below the threshold for aquatic ecotoxicity, they increased in the following order: water (0.021-0.187 μg Se L-1) < sediments (0.005-0.352 mg Se kg-1) < macrophytes (0.010-0.413 mg Se kg-1) < plankton (0.044-0.518 mg Se kg-1) indicating its possible biomagnification at the bottom of the food chain. Species known for high Se accumulation potential dominated the biomass of the main plankton groups and the composition of the macrophyte community, which may provide a more sensitive and accurate steady-state compartment monitor for Se assessment in freshwater biotopes.
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Affiliation(s)
| | - Tanja Žuna Pfeiffer
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia.
| | - Nikolina Bek
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | | | - Anita Galir Balkić
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Filip Stević
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Ivana Maksimović
- Faculty of Agriculture, University of Novi Sad, Novi Sad, Serbia
| | - Melita Mihaljević
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Zdenko Lončarić
- Faculty of Agrobiotechnical Sciences Osijek, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
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13
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Polyudova T, Lemkina L, Eroshenko D, Esaev A. Suppression of planktonic and biofilm of Escherichia coli by the synergistic lantibiotics-polymyxins combinations. Arch Microbiol 2024; 206:191. [PMID: 38520490 DOI: 10.1007/s00203-024-03922-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/28/2024] [Accepted: 03/02/2024] [Indexed: 03/25/2024]
Abstract
Escherichia coli are generally resistant to the lantibiotic's action (nisin and warnerin), but we have shown increased sensitivity of E. coli to lantibiotics in the presence of subinhibitory concentrations of polymyxins. Synergistic lantibiotic-polymyxin combinations were found for polymyxins B and M. The killing of cells at the planktonic and biofilm levels was observed for two collection and four clinical multidrug-resistant E. coli strains after treatment with lantibiotic-polymyxin B combinations. Thus, 24-h treatment of E. coli mature biofilms with warnerin-polymyxin B or nisin-polymyxin B leads to five to tenfold decrease in the number of viable cells, depending on the strain. AFM revealed that the warnerin and polymyxin B combination caused the loss of the structural integrity of biofilm and the destruction of cells within the biofilm. It has been shown that pretreatment of cells with polymyxin B leads to an increase of Ca2+ and Mg2+ ions in the culture medium, as detected by atomic absorption spectroscopy. The subsequent exposure to warnerin caused cell death with the loss of K+ ions and cell destruction with DNA and protein release. Thus, polymyxins display synergy with lantibiotics against planktonic and biofilm cells of E. coli, and can be used to overcome the resistance of Gram-negative bacteria to lantibiotics.
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Affiliation(s)
- Tatyana Polyudova
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Scientific Centre, Ural Branch, Russian Academy of Sciences, Perm, Russia.
| | - Larisa Lemkina
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Scientific Centre, Ural Branch, Russian Academy of Sciences, Perm, Russia
| | - Daria Eroshenko
- Institute of Technical Chemistry, Perm Federal Scientific Centre, Ural Branch, Russian Academy of Science, Perm, Russia
| | - Artem Esaev
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Scientific Centre, Ural Branch, Russian Academy of Sciences, Perm, Russia
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14
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Gheitasi R, Röll D, Müller MM, Naseri M, König R, Slevogt H, Pletz MW, Makarewicz O. Exploring secretory proteome and cytokine kinetic of human peripheral blood mononuclear cells exposed to methicillin-resistant Staphylococcus aureus biofilms and planktonic bacteria. Front Immunol 2024; 15:1334616. [PMID: 38571946 PMCID: PMC10989517 DOI: 10.3389/fimmu.2024.1334616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/26/2024] [Indexed: 04/05/2024] Open
Abstract
Staphylococcus aureus is a highly successful pathogen infecting various body parts and forming biofilms on natural and artificial surfaces resulting in difficult-to-treat and chronic infections. We investigated the secreted cytokines and proteomes of isolated peripheral blood mononuclear cells (PBMCs) from healthy volunteers exposed to methicillin-resistant S. aureus (MRSA) biofilms or planktonic bacteria. Additionally, the cytokine profiles in sera from patients with community-acquired pneumonia (CAP) caused by S. aureus were investigated. The aim was to gain insights into the immune response involved and differentiate between the planktonic and sessile MRSA forms. We identified 321 and 298 targets that were significantly differently expressed in PBMCs when exposed to planktonic or biofilm-embedded bacteria, respectively. PBMCs exposed to planktonic MRSA cells secreted increased levels of TNF-α, while IL-18 was elevated when exposed to the biofilm. The machine-learning analyses of the cytokine profiles obtained for the in vitro PBMCs and CAP sera distinguished between the two types of bacteria forms based on cytokines IL-18, IL12, and IL-17, and with a lower importance IL-6. Particularly, IL-18 which has not been correlated with S. aureus biofilms so far might represent a suitable marker for monitoring chronification during MRSA infection to individualize the therapy, but this hypothesis must be proved in clinical trials.
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Affiliation(s)
- Reza Gheitasi
- Institute of Infectious Diseases and Infection Control, Jena University Hospital/Friedrich Schiller University, Jena, Germany
| | - Daniela Röll
- Institute of Infectious Diseases and Infection Control, Jena University Hospital/Friedrich Schiller University, Jena, Germany
| | - Mario M Müller
- Septomics Research Center, Jena University Hospital, Jena, Germany
- Integrated Research and Treatment Center - Center for Sepsis Control and Care (CSCC), Jena University Hospital, Jena, Germany
| | - Mohadeseh Naseri
- Institute of Infectious Diseases and Infection Control, Jena University Hospital/Friedrich Schiller University, Jena, Germany
| | - Rainer König
- Institute of Infectious Diseases and Infection Control, Jena University Hospital/Friedrich Schiller University, Jena, Germany
- Integrated Research and Treatment Center - Center for Sepsis Control and Care (CSCC), Jena University Hospital, Jena, Germany
| | - Hortense Slevogt
- Respiratory Infection Dynamics, Helmholtz Centre for Infection Research-HZI Braunschweig, Braunschweig, Germany
- Department of Respiratory Medicine and Infectious Diseases, Hannover Medical School, German Center for Lung Research (DZL), Biomedical Research in Endstage & Obstructive Lung Disease (BREATH), Hannover, Germany
| | - Mathias W Pletz
- Institute of Infectious Diseases and Infection Control, Jena University Hospital/Friedrich Schiller University, Jena, Germany
- Integrated Research and Treatment Center - Center for Sepsis Control and Care (CSCC), Jena University Hospital, Jena, Germany
- CAPNETZ STIFTUNG, Hannover, Germany
| | - Oliwia Makarewicz
- Institute of Infectious Diseases and Infection Control, Jena University Hospital/Friedrich Schiller University, Jena, Germany
- Integrated Research and Treatment Center - Center for Sepsis Control and Care (CSCC), Jena University Hospital, Jena, Germany
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15
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Yalçın G, Yıldız D, Calderó-Pascual M, Yetim S, Şahin Y, Parakatselaki ME, Avcı F, Karakaya N, Ladoukakis ED, Berger SA, Ger KA, Jeppesen E, Beklioğlu M. Quality matters: Response of bacteria and ciliates to different allochthonous dissolved organic matter sources as a pulsed disturbance in shallow lakes. Sci Total Environ 2024; 916:170140. [PMID: 38244618 DOI: 10.1016/j.scitotenv.2024.170140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/11/2023] [Accepted: 01/11/2024] [Indexed: 01/22/2024]
Abstract
Shallow lake ecosystems are particularly prone to disturbances such as pulsed dissolved organic matter (allochthonous-DOM; hereafter allo-DOM) loadings from catchments. However, the effects of allo-DOM with contrasting quality (in addition to quantity) on the planktonic communities of microbial loop are poorly understood. To determine the impact of different qualities of pulsed allo-DOM disturbance on the coupling between bacteria and ciliates, we conducted a mesocosm experiment with two different allo-DOM sources added to mesocosms in a single-pulse disturbance event: Alder tree leaf extract, a more labile (L) source and HuminFeed® (HF), a more recalcitrant source. Allo-DOM sources were used as separate treatments and in combination (HFL) relative to the control without allo-DOM additions (C). Our results indicate that the quality of allo-DOM was a major regulator of planktonic microbial community biomass and/or composition through which both bottom-up and top-down forces were involved. Bacteria biomass showed significant nonlinear responses in L and HFL with initial increases followed by decreases to pre-pulse conditions. Ciliate biomass was significantly higher in L compared to all other treatments. In terms of composition, bacterivore ciliate abundance was significantly higher in both L and HFL treatments, mainly driven by the bacterial biomass increase in the same treatments. GAMM models showed negative interaction between metazoan zooplankton biomass and ciliates, but only in the L treatment, indicating top-down control on ciliates. Ecosystem stability analyses revealed overperformance, high resilience and full recovery of bacteria in the HFL and L treatments, while ciliates showed significant shift in compositional stability in HFL and L with incomplete taxonomic recovery. Our study highlights the importance of allo-DOM quality shaping the response within the microbial loop not only through triggering different scenarios in biomass, but also the community composition, stability, and species interactions (top-down and bottom-up) in bacteria and plankton.
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Affiliation(s)
- Gülce Yalçın
- Limnology Laboratory, Biological Sciences Department, Middle East Technical University, 06800 Ankara, Turkey; Ecosystem Research and Implementation Center, Middle East Technical University, 06800 Ankara, Turkey.
| | - Dilvin Yıldız
- Limnology Laboratory, Biological Sciences Department, Middle East Technical University, 06800 Ankara, Turkey; Earth System Sciences, Graduate School of Natural and Applied Science, Middle East Technical University, Ankara, Turkey.
| | - Maria Calderó-Pascual
- Centre for Freshwater and Environmental Studies, Dundalk Institute of Technology, Dundalk, Marshes Upper, Co. Louth A91 K584, Ireland..
| | - Sinem Yetim
- Limnology Laboratory, Biological Sciences Department, Middle East Technical University, 06800 Ankara, Turkey
| | - Yiğit Şahin
- Department of Biotechnology, Graduate School of Natural and Applied Sciences, Ege University, 35100 Izmir, Turkey; Department of Bioengineering, Faculty of Engineering, Ege University, 35100, Izmir, Turkey
| | | | - Feride Avcı
- Limnology Laboratory, Biological Sciences Department, Middle East Technical University, 06800 Ankara, Turkey.
| | | | - Emmanuel D Ladoukakis
- Department of Biology, University of Crete, Voutes University Campus, 70013 Heraklion, Greece.
| | - Stella A Berger
- Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Department of Plankton and Microbial Ecology, Zur alten Fischerhuette 2, 16775 Stechlin, Germany.
| | - Kemal Ali Ger
- Department of Ecology (DECOL), Federal University of Rio Grande do Norte, Natal, RN 59078-970, Brazil..
| | - Erik Jeppesen
- Limnology Laboratory, Biological Sciences Department, Middle East Technical University, 06800 Ankara, Turkey; Ecosystem Research and Implementation Center, Middle East Technical University, 06800 Ankara, Turkey; Department of Ecoscience, Aarhus University, 8000C Aarhus, Denmark; Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing, China.
| | - Meryem Beklioğlu
- Limnology Laboratory, Biological Sciences Department, Middle East Technical University, 06800 Ankara, Turkey; Ecosystem Research and Implementation Center, Middle East Technical University, 06800 Ankara, Turkey.
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16
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Mallmin E, Traulsen A, De Monte S. Chaotic turnover of rare and abundant species in a strongly interacting model community. Proc Natl Acad Sci U S A 2024; 121:e2312822121. [PMID: 38437535 PMCID: PMC10945849 DOI: 10.1073/pnas.2312822121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 02/02/2024] [Indexed: 03/06/2024] Open
Abstract
The composition of ecological communities varies not only between different locations but also in time. Understanding the fundamental processes that drive species toward rarity or abundance is crucial to assessing ecosystem resilience and adaptation to changing environmental conditions. In plankton communities in particular, large temporal fluctuations in species abundances have been associated with chaotic dynamics. On the other hand, microbial diversity is overwhelmingly sustained by a "rare biosphere" of species with very low abundances. We consider here the possibility that interactions within a species-rich community can relate both phenomena. We use a Lotka-Volterra model with weak immigration and strong, disordered, and mostly competitive interactions between hundreds of species to bridge single-species temporal fluctuations and abundance distribution patterns. We highlight a generic chaotic regime where a few species at a time achieve dominance but are continuously overturned by the invasion of formerly rare species. We derive a focal-species model that captures the intermittent boom-and-bust dynamics that every species undergoes. Although species cannot be treated as effectively uncorrelated in their abundances, the community's effect on a focal species can nonetheless be described by a time-correlated noise characterized by a few effective parameters that can be estimated from time series. The model predicts a nonunitary exponent of the power-law abundance decay, which varies weakly with ecological parameters, consistent with observation in marine protist communities. The chaotic turnover regime is thus poised to capture relevant ecological features of species-rich microbial communities.
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Affiliation(s)
- Emil Mallmin
- Max Planck Institute for Evolutionary Biology, Department of Theoretical Biology, Plön24306, Germany
| | - Arne Traulsen
- Max Planck Institute for Evolutionary Biology, Department of Theoretical Biology, Plön24306, Germany
| | - Silvia De Monte
- Max Planck Institute for Evolutionary Biology, Department of Theoretical Biology, Plön24306, Germany
- Institut de Biologie de l’ENS, Département de Biologie, École Normale Supérieure, CNRS, INSERM, Université Paris Science & Lettres, Paris75005, France
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17
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Pigani E, Mele BH, Campese L, Ser-Giacomi E, Ribera M, Iudicone D, Suweis S. Deviation from neutral species abundance distributions unveils geographical differences in the structure of diatom communities. Sci Adv 2024; 10:eadh0477. [PMID: 38457496 PMCID: PMC10923497 DOI: 10.1126/sciadv.adh0477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 02/05/2024] [Indexed: 03/10/2024]
Abstract
In recent years, the application of metagenomics techniques has advanced our understanding of plankton communities and their global distribution. Despite this progress, the relationship between the abundance distribution of diatom species and varying marine environmental conditions remains poorly understood. This study, leveraging data from the Tara Oceans expedition, tests the hypothesis that diatoms in sampled stations display a consistent species abundance distribution structure, as though they were sampled from a single ocean-wide metacommunity. Using a neutral sampling theory, we thus develop a framework to estimate the structure and diversity of diatom communities at each sampling station given the shape of the species abundance distribution of the metacommunity and the information of a reference station. Our analysis reveals a substantial temperature gradient in the discrepancies between predicted and observed biodiversity across the sampled stations. These findings challenge the hypothesis of a single neutral metacommunity, indicating that environmental differences substantially influence both the composition and structure of diatom communities.
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Affiliation(s)
- Emanuele Pigani
- Stazione Zoologica Anton Dohrn, 80135 Napoli, Italy
- Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, 35131 Padova, Italy
| | | | | | - Enrico Ser-Giacomi
- Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | | | | | - Samir Suweis
- Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, 35131 Padova, Italy
- Istituto Nazionale di Fisica Nucleare, INFN, Sezione di Padova, 35131 Padova, Italy
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18
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Kajan K, Fuchs BM, Orlić S. Insight into planktonic protistan and fungal communities across the nutrient-depleted environment of the South Pacific Subtropical Gyre. Microbiol Spectr 2024; 12:e0301623. [PMID: 38334383 PMCID: PMC10913754 DOI: 10.1128/spectrum.03016-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 01/18/2024] [Indexed: 02/10/2024] Open
Abstract
Ocean microorganisms constitute ~70% of the marine biomass, contribute to ~50% of the Earth's primary production, and play a vital role in global biogeochemical cycles. The marine heterotrophic and mixotrophic protistan and fungal communities have often been overlooked mainly due to limitations in morphological species identification. Despite the accumulation of studies on biogeographic patterns observed in microbial communities, our understanding of the abundance and distribution patterns within the microbial community of the largest subtropical gyre, the South Pacific Gyre (SPG), remains incomplete. Here, we investigated the diversity and vertical composition of protistan and fungal communities in the water column of the ultra-oligotrophic SPG. Our results showed apparent differences in protistan community diversity in the photic and aphotic regions. The entire protistan community diversity was significantly affected by temperature, salinity, oxygen, and nutrient concentrations, while the parasitic community diversity was also affected by chlorophyll a concentration. The parasitic protists were assigned to the class Syndiniales accounting for over 98% of the total parasitic protists, exhibiting higher relative sequence abundance along the water depth and displaying consistent patterns among different sampling stations. In contrast to the protistan community, the fungal community along the SPG primarily clustered based on the sampling station and pelagic zones. In particular, our study reveals a significant presence of parasitic protists and functionally diverse fungi in SPG and their potential impact on carbon cycling in the gyre.IMPORTANCEOur findings carry important implications for understanding the distribution patterns of the previously unrecognized occurrence of parasitic protists and functionally diverse fungi in the nutrient-limited South Pacific Gyre. In particular, our study reveals a significant presence of parasitic Syndiniales, predominantly abundant in the upper 300 m of the aphotic zone in the gyre, and a distinct presence of fungal communities in the aphotic zone at the central part of the gyre. These findings strongly suggest that these communities play a substantial role in yet insufficiently described microbial food web. Moreover, our research enhances our understanding of their contribution to the dynamics of the food webs in oligotrophic gyres and is valuable for projecting the ecological consequences of future climate warming.
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Affiliation(s)
- Katarina Kajan
- Division of Materials Chemistry, Ruđer Bošković Institute, Zagreb, Croatia
- Center of Excellence for Science and Technology-Integration of Mediterranean Region (STIM), Zagreb, Croatia
| | - Bernhard M. Fuchs
- Department of Molecular Ecology, Max Planck Institute for Marine Microbiology, Bremen, Germany
| | - Sandi Orlić
- Division of Materials Chemistry, Ruđer Bošković Institute, Zagreb, Croatia
- Center of Excellence for Science and Technology-Integration of Mediterranean Region (STIM), Zagreb, Croatia
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19
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Sabatino R, Zullo R, Di Cesare A, Piscia R, Musazzi S, Corno G, Volta P, Galafassi S. Traditional and biodegradable plastics host distinct and potentially more hazardous microbes when compared to both natural materials and planktonic community. J Hazard Mater 2024; 465:133166. [PMID: 38101010 DOI: 10.1016/j.jhazmat.2023.133166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/21/2023] [Accepted: 11/30/2023] [Indexed: 12/17/2023]
Abstract
Microplastic particles are persistent micropollutants that provide a substrate for the growth of bacterial biofilms, posing a threat to the environment. This study explores the changes in commercially available food containers made of conventional (polypropylene PP, polyethylene terephthalate PET), innovative biodegradable (Mater-Bi) and natural (wood and cellulose) materials, when introduced in the surface waters of Lake Maggiore for 43 days. Spectral changes revealed by FT-IR spectroscopy in PET and Mater-Bi, and changes in thermal properties of all human-made material tested indicated a degradation process occurred during environmental exposure. Despite similar bacterial richness, biofilms on PET, PP, and Mater-Bi differed from natural material biofilms and the planktonic community. Human-made material communities showed a higher proportion of potential pathogens, with PET and PP also exhibiting increased abundances of antibiotic resistance genes. Overall, these findings stress the need for dedicated strategies to curb the spread of human-made polymers in freshwaters, including innovative materials that, due to their biodegradable properties, might be perceived less hazardous for the environment.
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Affiliation(s)
| | - Rosa Zullo
- Water Research Institute, National Research Council, Verbania, Italy.
| | - Andrea Di Cesare
- Water Research Institute, National Research Council, Verbania, Italy; NBFC, National Biodiversity Future Center, Palermo 90133, Italy
| | - Roberta Piscia
- Water Research Institute, National Research Council, Verbania, Italy
| | - Simona Musazzi
- Water Research Institute, National Research Council, Verbania, Italy
| | - Gianluca Corno
- Water Research Institute, National Research Council, Verbania, Italy; NBFC, National Biodiversity Future Center, Palermo 90133, Italy
| | - Pietro Volta
- Water Research Institute, National Research Council, Verbania, Italy
| | - Silvia Galafassi
- Water Research Institute, National Research Council, Verbania, Italy; NBFC, National Biodiversity Future Center, Palermo 90133, Italy
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20
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Peperzak L, Casas-Monroy O, Bailey SA. Validation of an adenosine triphosphate (ATP) model for 10-50 μm plankton. Mar Pollut Bull 2024; 200:116066. [PMID: 38278016 DOI: 10.1016/j.marpolbul.2024.116066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/18/2024] [Accepted: 01/19/2024] [Indexed: 01/28/2024]
Abstract
A recent model demonstrated that the adenosine triphosphate (ATP) content of spherical aquatic organisms with a 10 to 50 μm diameter is between 0.16 and 19.9 pg cell-1. Here, the model is validated by comparing microscopy-based counts with ATP concentrations from a commercial ATP kit. The measured ATP content of both freshwater and marine organisms 10 to 50 μm size range falls in the 0.16 to 19.9 pg cell-1 model range. On average, freshwater organisms contain 0.33 pg ATP cell-1, have a spherical equivalent diameter (SED) of 13 μm, while marine organisms have 0.89 pg ATP cell-1 and a SED of 18 μm. In addition, their 13 to 18 μm size is within the 10 to 50 μm ballast water size range and in agreement with the 15 μm mean SED of a coastal plankton size-distribution model. This study concludes that the ATP-model is reliable, emphasizing the need for caution when converting three-dimensional biomass proxies into linear cell concentrations.
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Affiliation(s)
- Louis Peperzak
- NIOZ Royal Institute for Sea Research, Department of Estuarine & Delta Systems, PO Box 59, NL-1790 AB Den Burg, the Netherlands.
| | - Oscar Casas-Monroy
- Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 867 Lakeshore Road, Burlington, ON L7S 1A1, Canada
| | - Sarah A Bailey
- Great Lakes Laboratory for Fisheries and Aquatic Sciences, Fisheries and Oceans Canada, 867 Lakeshore Road, Burlington, ON L7S 1A1, Canada
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21
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Li Z, Qi L, Cui R, Zhang N, Song C, Li X, Lu X, Fan Y. De novo transcriptome assembly and molecular response mechanism analysis of a diatom Cyclotella meneghiniana Kützing exposed to cadmium. Ecotoxicol Environ Saf 2024; 272:116020. [PMID: 38306816 DOI: 10.1016/j.ecoenv.2024.116020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 01/20/2024] [Accepted: 01/24/2024] [Indexed: 02/04/2024]
Abstract
Cadmium is a persistent heavy metal commonly found in aquatic ecosystems and has a strong toxic effect on organisms. The sensitivity of phytoplankton to environmental changes and its role as an indicator of aquatic ecosystem health have been well-established. However, the mechanisms by which phytoplankton respond to cadmium remain incompletely understood. In this study, we chose the typical planktonic diatom Cyclotella meneghiniana Kützing, by integrating physiological-biochemical data and transcriptome analysis, to reveal the molecular mechanisms of C. meneghiniana responing to cadmium. Under cadmium stress, the cell density and chlorophyll-a content of C. meneghiniana significantly decreased, while MDA content and SOD activity gradually increased. At 72 h of cadmium stress, we found that at this time point, cell abundance and physiological variation were very significant, therefore we selected 72 h for subsequent analysis. To better understand the cadmium stress response mechanisms of C. meneghiniana, a de novo transcriptome method was used to analyse C. meneghiniana under cadmium stress for 72 h, and 1704 (M vs. CK) and 4788 (H vs. CK) differentially expressed genes were found. Our results showed that the changes in gene expression were closely correlated to the physiological-biochemical changes. Although cadmium stress could promote the nitrogen metabolism pathway, ROS scavenging system, and photosynthesis. While, C. meneghiniana under medium and high concentrations of cadmium can also limit various intracellular metabolic pathways, such as the MAPK pathway and phosphatidylinositol metabolic pathway, and the degree of inhibition increases with the increase of stress concentration. In present study, the complete molecular mechanism of the planktonic diatom response to cadmium has been established, which provided important information for further studies on heavy metal pollutants and the multiple functional genes responsible for cadmium sensitivity and tolerance in planktonic diatoms.
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Affiliation(s)
- Zhenxiang Li
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Lin Qi
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Runbo Cui
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China
| | - Nannan Zhang
- Modern Educational Technology and Experiment Center, Harbin Normal University, Harbin 150025, China
| | - Chunhua Song
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China; Key Laboratory of Biodiversity of Aquatic Organisms, Harbin Normal University, Harbin 150025, China
| | - Xue Li
- Moutai Institute, Zunyi 564507, China
| | - Xinxin Lu
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China; Key Laboratory of Biodiversity of Aquatic Organisms, Harbin Normal University, Harbin 150025, China.
| | - Yawen Fan
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China; Key Laboratory of Biodiversity of Aquatic Organisms, Harbin Normal University, Harbin 150025, China.
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22
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Pucelik B, Barzowska A, Sułek A, Werłos M, Dąbrowski JM. Refining antimicrobial photodynamic therapy: effect of charge distribution and central metal ion in fluorinated porphyrins on effective control of planktonic and biofilm bacterial forms. Photochem Photobiol Sci 2024; 23:539-560. [PMID: 38457119 DOI: 10.1007/s43630-024-00538-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 01/13/2024] [Indexed: 03/09/2024]
Abstract
Antibiotic resistance represents a pressing global health challenge, now acknowledged as a critical concern within the framework of One Health. Photodynamic inactivation of microorganisms (PDI) offers an attractive, non-invasive approach known for its flexibility, independence from microbial resistance patterns, broad-spectrum efficacy, and minimal risk of inducing resistance. Various photosensitizers, including porphyrin derivatives have been explored for pathogen eradication. In this context, we present the synthesis, spectroscopic and photophysical characteristics as well as antimicrobial properties of a palladium(II)-porphyrin derivative (PdF2POH), along with its zinc(II)- and free-base counterparts (ZnF2POH and F2POH, respectively). Our findings reveal that the palladium(II)-porphyrin complex can be classified as an excellent generator of reactive oxygen species (ROS), encompassing both singlet oxygen (Φ△ = 0.93) and oxygen-centered radicals. The ability of photosensitizers to generate ROS was assessed using a variety of direct (luminescence measurements) and indirect techniques, including specific fluorescent probes both in solution and in microorganisms during the PDI procedure. We investigated the PDI efficacy of F2POH, ZnF2POH, and PdF2POH against both Gram-negative and Gram-positive bacteria. All tested compounds proved high activity against Gram-positive species, with PdF2POH exhibiting superior efficacy, leading to up to a 6-log reduction in S. aureus viability. Notably, PdF2POH-mediated PDI displayed remarkable effectiveness against S. aureus biofilm, a challenging target due to its complex structure and increased resistance to conventional treatments. Furthermore, our results show that PDI with PdF2POH is more selective for bacterial than for mammalian cells, particularly at lower light doses (up to 5 J/cm2 of blue light illumination). This enhanced efficacy of PdF2POH-mediated PDI as compared to ZnF2POH and F2POH can be attributed to more pronounced ROS generation by palladium derivative via both types of photochemical mechanisms (high yields of singlet oxygen generation as well as oxygen-centered radicals). Additionally, PDI proved effective in eliminating bacteria within S. aureus-infected human keratinocytes, inhibiting infection progression while preserving the viability and integrity of infected HaCaT cells. These findings underscore the potential of metalloporphyrins, particularly the Pd(II)-porphyrin complex, as promising photosensitizers for PDI in various bacterial infections, warranting further investigation in advanced infection models.
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Affiliation(s)
- Barbara Pucelik
- Faculty of Chemistry, Jagiellonian University, Kraków, Poland.
- Malopolska Centre of Biotechnology, Jagiellonian University, Kraków, Poland.
- Sano Centre for Computational Medicine, Kraków, Poland.
| | - Agata Barzowska
- Malopolska Centre of Biotechnology, Jagiellonian University, Kraków, Poland
- Doctoral School of Exact and Natural Sciences, Jagiellonian University, Kraków, Poland
| | - Adam Sułek
- Faculty of Chemistry, Jagiellonian University, Kraków, Poland
- Sano Centre for Computational Medicine, Kraków, Poland
| | - Mateusz Werłos
- Faculty of Chemistry, Jagiellonian University, Kraków, Poland
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Wang C, Song Z, Zhang H, Sun Y, Hu X. Deciphering variations in the surficial bacterial compositions and functional profiles in the intersection between North and South Yellow Sea. Mar Environ Res 2024; 195:106355. [PMID: 38244366 DOI: 10.1016/j.marenvres.2024.106355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 01/08/2024] [Accepted: 01/10/2024] [Indexed: 01/22/2024]
Abstract
The coastal ocean systems play paramount role in the nutrient biogeochemistry because of its interconnected environment. To gain a novel insight into coupling relationships between bacterial community, functioning properties and nutrient metabolism, we conducted analysis on the patterns and driving factors of planktonic bacterial functional community across subsurface water of marine ranching near the Yellow Sea in both summer and winter. Illumina HiSeq Sequencing and a corresponding set of biogeochemical data were used to assess distribution patterns of taxa, adaptive mechanism and metabolic function. Results demonstrated that Proteobacteria, Cyanobacteria, Actinobacteriota and Bacteroidota were dominant phyla both in summer and winter. Taxonomic profiles related to nutrient variation were found to be highly correlated with Dissolved Oxygen (DO) and Chlorophyll fluorescence (FLUO), and distinct diversity differences were also found between summer and winter samples. Functional activity in summer associated with the relative abundance of phototrophy and photoautotrophy were the highest in the subsurface water, while in winter the dominant functional properties were mainly include chemoheterotrophy and aerobic_ chemoheterotrophy. A significant difference related to functional activity between summer and winter, mainly representing ligninolysis and iron_respiration. In general, our study provides a framework for understanding the relative importance of environmental factors, temperature variation and nutrient availability in shaping the metabolic processes of aquatic microorganisms, particularly in ocean mariculture systems.
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Affiliation(s)
- Caixia Wang
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264403, China; Yantai Key Laboratory of Pharmacology of Traditional Chinese Medicine in Tumor Metabolism, School of Traditional Chinese Medicine, Binzhou Medical University, Yantai, 264003, China
| | - Zenglei Song
- Yantai Vocational College, Yantai, 264003, China
| | - Haikun Zhang
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264403, China
| | - Yanyu Sun
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264403, China
| | - Xiaoke Hu
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264403, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266237, China.
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24
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Tan K, Xu P, Huang L, Luo C, Huang J, Fazhan H, Kwan KY. Effects of bivalve aquaculture on plankton and benthic community. Sci Total Environ 2024; 914:169892. [PMID: 38211869 DOI: 10.1016/j.scitotenv.2024.169892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 01/01/2024] [Accepted: 01/01/2024] [Indexed: 01/13/2024]
Abstract
Global human population has increased dramatically over the past 50 years. As a result, marine fisheries and finfish aquaculture have become increasingly unsustainable, driving bivalve aquaculture to become an important food industry for the production of marine animal protein to support the growing market demand for animal protein. It is projected that the rate of bivalve aquaculture expansion will be greatly accelerated in the near future as the human population continues to increase. Although it is generally believed that unfed bivalve aquaculture has less impact on the environment than finfish aquaculture, the rapid expansion of bivalve aquaculture has raised concerns about its potential negative impact, especially on plankton and benthic community. Therefore, there is an urgent need to update the potential effects of bivalve aquaculture on plankton and benthic community. This article reviews the present state of knowledge on environmental issues related to bivalve aquaculture, and discusses potential mitigation measures for the environmental impacts induced by expansion of bivalve aquaculture. This review provides guidance for scientists and farm managers to clarify the current state of research and identify priority research needs for future bivalve aquaculture research. Therefore, specific management strategies can be formulated for the sustainable development and expansion of bivalve aquaculture.
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Affiliation(s)
- Karsoon Tan
- College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf Ocean Development Research Centre, Beibu Gulf University, Beibu Gulf Marine Ecological Environment Field Observation and Research Station of Guangxi, Qinzhou, Guangxi, China
| | - Peng Xu
- College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf Ocean Development Research Centre, Beibu Gulf University, Beibu Gulf Marine Ecological Environment Field Observation and Research Station of Guangxi, Qinzhou, Guangxi, China
| | - Leiheng Huang
- College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf Ocean Development Research Centre, Beibu Gulf University, Beibu Gulf Marine Ecological Environment Field Observation and Research Station of Guangxi, Qinzhou, Guangxi, China
| | - Cong Luo
- College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf Ocean Development Research Centre, Beibu Gulf University, Beibu Gulf Marine Ecological Environment Field Observation and Research Station of Guangxi, Qinzhou, Guangxi, China
| | - Jinman Huang
- College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf Ocean Development Research Centre, Beibu Gulf University, Beibu Gulf Marine Ecological Environment Field Observation and Research Station of Guangxi, Qinzhou, Guangxi, China
| | - Hanafiah Fazhan
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries, Universiti Malaysia Terengganu, Kuala Nerus, Malaysia
| | - Kit Yue Kwan
- College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf Ocean Development Research Centre, Beibu Gulf University, Beibu Gulf Marine Ecological Environment Field Observation and Research Station of Guangxi, Qinzhou, Guangxi, China.
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25
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Gehlot B, Chandra S, Joshi R, Arya M, Chakrabarti R. Temporal Variations in Plankton Communities and Environmental Factors in the Shipra, a Central Himalayan Tributary of the Kosi River in Uttarakhand, India. Environ Monit Assess 2024; 196:326. [PMID: 38421504 DOI: 10.1007/s10661-024-12513-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/26/2024] [Indexed: 03/02/2024]
Abstract
The essential role of smaller streams and tributaries indigenous to the area is crucial in revitalizing and restoring the main river system. The present study unraveled the relationship between plankton communities and environmental variables in the Shipra River, a Central Himalayan tributary of the Kosi River in Uttarakhand, India. Plankton distribution, abundance, and presence were investigated at four locations: upstream (S1 and S2) and downstream (S3 and S4). Forty-eight genera of phytoplankton and zooplankton have been identified belonging to ten classes (Bacillariophyceae, Chlorophyceae, Zygnematophyceae, Cyanophyceae, Euglenopyceae, Protozoa, Rotifers, Copepoda, Cladocera, and Insecta) based on the findings. Winter was dominated by phytoplankton (Navicula spp., Nitzchia spp., Diatom spp.); summer and monsoon by zooplankton (Daphnia spp., Cyclops spp., Keratella spp., Brachionus spp.). Plankton communities of the tributary were assessed using diversity indices (Shannon-Weiner's index (H), Simpson's diversity index (1-D), and Evenness Index (E)). Seasonal variations in water temperature, specific conductivity, total dissolved solids, dissolved oxygen, nitrate, and ammonium ions were found to be statistically significant (p<0.05). Canonical Correspondence Analysis, K-dominance plots, cluster analysis, and NMDS analysis showed the dynamic nature of the plankton communities with seasonal physiochemical variations in the unexplored Himalayan tributary. The plankton communities exhibited significant temporal fluctuations with physicochemical factors.
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Affiliation(s)
- Bhawna Gehlot
- Aqua Research Lab, Department of Zoology, Delhi University, New Delhi, 110007, India
- ICAR- Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Suresh Chandra
- ICAR- Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India.
| | - Rini Joshi
- ICAR- Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Mukul Arya
- ICAR- Directorate of Coldwater Fisheries Research, Bhimtal, 263136, Uttarakhand, India
| | - Rina Chakrabarti
- Aqua Research Lab, Department of Zoology, Delhi University, New Delhi, 110007, India
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26
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Yuan D, Long Y, Liu D, Zhou F, Liu C, Chen L, Pan Y. Ecological impact of surfactant Tween-80 on plankton: High-scale analyses reveal deeper hazards. Sci Total Environ 2024; 912:169176. [PMID: 38086477 DOI: 10.1016/j.scitotenv.2023.169176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 11/18/2023] [Accepted: 12/05/2023] [Indexed: 01/18/2024]
Abstract
The ecological risks of surfactants have been largely neglected because of their low toxicity. Multiscale studies have indicated that even if a pollutant causes no acute toxicity in a test species, it may alter interspecific interactions and community characteristics through sublethal impacts on test organisms. Therefore, we investigated the lethal and sublethal responses of the plankton species Scenedesmus quadricauda, Chlorella vulgaris, and Daphnia magna, to surfactant Tween-80. Then, high-scale responses in grazer life-history traits and stability of the D. magna-larval damselfly system were further explored. The results showed that discernible adverse effects on the growth or survival of the three plankton species were evident only at exceptionally high concentrations (≥100 mg L-1). However, 10 mg L-1 of Tween-80 notably affected the MDA concentration in grazer species, simultaneously displaying a tendency to diminish grazer's heartbeat and swimming frequency. Furthermore, Tween-80 reduced the grazer reproductive capacity and increased its predation risk by larval damselflies, which ultimately jeopardized the stability of the D. magna-larval damselfly system at much lower concentrations (10-100 fold lower) than the individual-scale responses. This study provides evidence that high-scale traits are far more sensitive to Tween-80, compared with individual-scale traits for plankton organisms, suggesting that the ecological risks of Tween-80 demand careful reassessment. SYNOPSIS: The concentration of Tween-80 needed to induce changes in community characteristics is markedly lower than that needed to produce individual-scale consequences. Thus, high-scale analyses have broad implications for understanding the hazardous effects of surfactants compared with an individual-scale analysis.
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Affiliation(s)
- Duanyang Yuan
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan 650091, China; Yunnan International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management & Yunnan Think Tank of Ecological Civilization, Kunming, Yunnan 650091, China
| | - Yaoyue Long
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan 650091, China; Yunnan International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management & Yunnan Think Tank of Ecological Civilization, Kunming, Yunnan 650091, China; Institute of International Rivers and Eco-Security, Yunnan University, Kunming, Yunnan 650091, China
| | - Dan Liu
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan 650091, China; Yunnan International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management & Yunnan Think Tank of Ecological Civilization, Kunming, Yunnan 650091, China
| | - Fangjie Zhou
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, Yunnan 650091, China
| | - Change Liu
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan 650091, China; Yunnan International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management & Yunnan Think Tank of Ecological Civilization, Kunming, Yunnan 650091, China
| | - Liqiang Chen
- Institute of International Rivers and Eco-Security, Yunnan University, Kunming, Yunnan 650091, China
| | - Ying Pan
- School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, Yunnan 650091, China; Yunnan International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management & Yunnan Think Tank of Ecological Civilization, Kunming, Yunnan 650091, China.
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27
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Siriarchawatana P, Harnpicharnchai P, Phithakrotchanakoon C, Kitikhun S, Mayteeworakoon S, Chunhametha S, Eurwilaichitr L, Ingsriswang S. Elucidating potential bioindicators from insights in the diversity and assembly processes of prokaryotic and eukaryotic communities in the Mekong River. Environ Res 2024; 243:117800. [PMID: 38056615 DOI: 10.1016/j.envres.2023.117800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/23/2023] [Accepted: 11/25/2023] [Indexed: 12/08/2023]
Abstract
Drivers for spatio-temporal distribution patterns of overall planktonic prokaryotes and eukaryotes in riverine ecosystems are generally not fully understood. This study employed amplicon metabarcoding to investigate the distributions and assembly mechanisms of bacterial and eukaryotic communities in the Mekong River. The prevailing bacteria taxa were found to be Betaproteobacteria, Actinobacteria, and Bacteroidetes, while the dominant eukaryotic organisms were cryptophytes, chlorophytes, and diatoms. The community assemblages were influenced by a combination of stochastic and deterministic processes. Drift (DR) and dispersal limitation (DL), signifying the stochastic mechanism, were the main processes shaping the overall prokaryotic and eukaryotic communities. However, homogeneous selection (HoS), indicating deterministic mechanism, played a major role in the assembly process of core prokaryotic communities, especially in the wet season. In contrast, the core eukaryotic communities including Opisthokonta, Sar, and Chlorophyta were dominated by stochastic processes. The significance of HoS within prokaryotic communities was also found to exhibit a decreasing trend from the upstream sampling sites (Chiang Saen and Chiang Khan, Nong Khai) towards the downstream sites (Mukdahan, and Khong Chiam) of the Mekong River. The environmental gradients resulting from the site-specific variations and the gradual decrease in elevation along the river may have a potential influence on the role of HoS in community assembly. Crucial environmental factors that shape the phylogenetic structure within distinct bins of the core prokaryotic communities including water depth, temperature, chloride, sodium, and sulphate were identified, as inferred by their correlation with the beta Net Relatedness Index (betaNRI) during the wet season. Overall, these findings enhance understanding of the complex mechanisms governing the spatio-temporal dynamics of prokaryotic and eukaryotic communities in the Mekong River. Finally, insights gained from this study could provide information on further use of specific core bacteria as microbial-based bioindicators that are effective for the assessment and conservation of the Mekong River ecosystem.
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Affiliation(s)
- Paopit Siriarchawatana
- Thailand Bioresource Research Center (TBRC), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Piyanun Harnpicharnchai
- Thailand Bioresource Research Center (TBRC), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Chitwadee Phithakrotchanakoon
- Thailand Bioresource Research Center (TBRC), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Supattra Kitikhun
- Thailand Bioresource Research Center (TBRC), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Sermsiri Mayteeworakoon
- Thailand Bioresource Research Center (TBRC), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Suwanee Chunhametha
- Thailand Bioresource Research Center (TBRC), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Lily Eurwilaichitr
- National Energy Technology Center (ENTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand
| | - Supawadee Ingsriswang
- Thailand Bioresource Research Center (TBRC), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Pathumthani, Thailand.
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Moreira W, Alonso O, Paule A, Martínez I, Le Du-Carreé J, Almeda R. Life stage-specific effects of tire particle leachates on the cosmopolitan planktonic copepod Acartia tonsa. Environ Pollut 2024; 343:123256. [PMID: 38171424 DOI: 10.1016/j.envpol.2023.123256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/20/2023] [Accepted: 12/27/2023] [Indexed: 01/05/2024]
Abstract
Tire wear particles (TWP) are a major source of microplastics in the aquatic environment and the ecological impacts of their leachates are of major environmental concern. Among marine biota, copepods are the most abundant animals in the ocean and a main link between primary producers and higher trophic levels in the marine food webs. In this study, we determined the acute lethal and sublethal effects of tire particle leachates on different life stages of the cosmopolitan planktonic copepod Acartia tonsa. Median lethal concentration (LC50, 48 h) ranged from 0.4 to 0.6 g L-1 depending on the life stages, being nauplii and copepodites more sensitive to tire particle leachates than adults. The median effective concentration (EC50, 48 h) for hatching was higher than 1 g L-1, indicating a relatively low sensitivity of hatching to tire particle leachates. However, metamorphosis (from nauplius VI to copepodite I) was notably reduced by tire particle leachates with an EC50 (48 h) of 0.23 g L-1 and the absence of metamorphosis at 1 g L-1, suggesting a strong developmental delay or endocrine disruption. Leachates also caused a significant decrease (10-22%) in the body length of nauplii and copepodites after exposure to TWP leachates (0.25 and 0.5 g L-1). We tested a battery of enzymatic biomarkers in A. tonsa adult stages, but a sublethal concentration of 50 mg L-1 of tire particle leachates did not cause a statistically significant effect on the measured enzymatic activities. Our results show that tire particle leachates can negatively impact the development, metamorphosis, and survival of planktonic copepods. More field data on concentrations of TWPs and the fate and persistence of their leached additives is needed for a better assessment of the risk of tire particle pollution on marine food webs.
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Affiliation(s)
- Wilma Moreira
- EOMAR, ECOAQUA, University of Las Palmas de Gran Canaria, Spain
| | - Olalla Alonso
- EOMAR, ECOAQUA, University of Las Palmas de Gran Canaria, Spain
| | - Antonio Paule
- EOMAR, ECOAQUA, University of Las Palmas de Gran Canaria, Spain
| | - Ico Martínez
- EOMAR, ECOAQUA, University of Las Palmas de Gran Canaria, Spain
| | | | - Rodrigo Almeda
- EOMAR, ECOAQUA, University of Las Palmas de Gran Canaria, Spain.
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Dobbertin da Costa M, Gast RJ, Millette NC. Temporal and spatial variability of constitutive mixotroph abundance and proportion. FEMS Microbiol Ecol 2024; 100:fiae015. [PMID: 38308512 PMCID: PMC10939395 DOI: 10.1093/femsec/fiae015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/19/2023] [Accepted: 02/01/2024] [Indexed: 02/04/2024] Open
Abstract
Mixotrophic plankton can comprise a substantial portion of the plankton community compared to phytoplankton and zooplankton. However, there is a gap in the understanding of conditions that influence mixotroph prevalence and activity in situ because current methods often over- or underestimate mixotroph abundance. A labeled prey-tracer method was utilized to identify active mixotrophs present at two locations in a temperate estuary over a year. The tracer method was combined with light microscopy data to estimate active mixotroph abundance and proportion. This study estimated that actively grazing mixotrophic taxa were more abundant in the spring and autumn compared to summer. Dinoflagellates typically dominated the mixotrophic taxa except during autumn at the low salinity location when cryptophytes dominated. Further analysis suggested that active mixotroph abundances might not be only regulated by environmental conditions favorable to mixotrophy but, instead, environmental conditions favorable to different mixotrophs utilization of phagotrophy. By focusing on mixotrophic taxa that were identified to be actively grazing at time of sampling, this study provided a more nuanced estimation of mixotroph abundance, increasing the understanding of how mixotrophic abundance and proportion in situ are influenced by the planktonic community composition and environmental factors.
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Affiliation(s)
- Marcella Dobbertin da Costa
- Virginia Institute of Marine Science, William & Mary, 1370 Greate Rd., Gloucester Point, VA 23062, United States
| | - Rebecca J Gast
- Woods Hole Oceanographic Institution, 266 Woods Hole Rd, MS #32, Woods Hole, MA 02543, United States
| | - Nicole C Millette
- Virginia Institute of Marine Science, William & Mary, 1370 Greate Rd., Gloucester Point, VA 23062, United States
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Heine N, Doll-Nikutta K, Stein F, Jakobi J, Ingendoh-Tsakmakidis A, Rehbock C, Winkel A, Barcikowski S, Stiesch M. Anti-biofilm properties of laser-synthesized, ultrapure silver-gold-alloy nanoparticles against Staphylococcus aureus. Sci Rep 2024; 14:3405. [PMID: 38336925 PMCID: PMC10858226 DOI: 10.1038/s41598-024-53782-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 02/05/2024] [Indexed: 02/12/2024] Open
Abstract
Staphylococcus aureus biofilm-associated infections are a common complication in modern medicine. Due to inherent resilience of biofilms to antibiotics and the rising number of antibiotic-resistant bacterial strains, new treatment options are required. For this purpose, ultrapure, spherical silver-gold-alloy nanoparticles with homogenous elemental distribution were synthesized by laser ablation in liquids and analyzed for their antibacterial activity on different stages of S. aureus biofilm formation as well as for different viability parameters. First, the effect of nanoparticles against planktonic bacteria was tested with metabolic activity measurements. Next, nanoparticles were incubated with differently matured S. aureus biofilms, which were then analyzed by metabolic activity measurements and three dimensional live/dead fluorescent staining to determine biofilm volume and membrane integrity. It could be shown that AgAu NPs exhibit antibacterial properties against planktonic bacteria but also against early-stage and even mature biofilms, with a complete diffusion through the biofilm matrix. Furthermore, AgAu NPs primarily targeted metabolic activity, to a smaller extend membrane integrity, but not the biofilm volume. Additional molecular analyses using qRT-PCR confirmed the influence on different metabolic pathways, like glycolysis, stress response and biofilm formation. As this shows clear similarities to the mechanism of pure silver ions, the results strengthen silver ions to be the major antibacterial agent of the synthesized nanoparticles. In summary, the results of this study provide initial evidence of promising anti-biofilm characteristics of silver-gold-alloy nanoparticles and support the importance of further translation-oriented analyses in the future.
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Affiliation(s)
- Nils Heine
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany.
| | - Katharina Doll-Nikutta
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Frederic Stein
- Technical Chemistry I, University of Duisburg Essen, Universitaetsstr. 7, 45141, Essen, Germany
| | - Jurij Jakobi
- Technical Chemistry I, University of Duisburg Essen, Universitaetsstr. 7, 45141, Essen, Germany
| | - Alexandra Ingendoh-Tsakmakidis
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Christoph Rehbock
- Technical Chemistry I, University of Duisburg Essen, Universitaetsstr. 7, 45141, Essen, Germany
| | - Andreas Winkel
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany
| | - Stephan Barcikowski
- Technical Chemistry I, University of Duisburg Essen, Universitaetsstr. 7, 45141, Essen, Germany
| | - Meike Stiesch
- Department of Prosthetic Dentistry and Biomedical Materials Science, Hannover Medical School, Carl-Neuberg-Straße 1, 30625, Hannover, Germany.
- Lower Saxony Centre of Biomedical Engineering, Implant Research and Development, Stadtfelddamm 34, 30625, Hannover, Germany.
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31
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Mandal A, Sk N, Biswas S. Nutrient enrichment and phyto plankton toxicity influence a diversity of complex dynamics in a fear-induced plankton-fish model. J Theor Biol 2024; 578:111698. [PMID: 38081508 DOI: 10.1016/j.jtbi.2023.111698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 10/15/2023] [Accepted: 12/02/2023] [Indexed: 12/22/2023]
Abstract
In this paper, we contemplate the dynamics of an aquatic system consisting of three interacting species, phytoplankton, zooplankton, and fish. We assume that the evading risk of fish predation induces fear in zooplankton species, which affects its growth dynamics radically. On the other hand, zooplankton develop an anti-predator defense by taking temporary refuge. Interestingly, the system potentially exhibits multi-stable configurations under identical ecological conditions by allowing different bifurcation scenarios, including multiple saddle-node and transcritical bifurcations with varying levels of nutrients, strength of phytoplankton toxicity, zooplankton refuge size and the cost of fear imposed by fish population. Further, by adding Gaussian white noise, we have extended the deterministic system to its stochastic version. We find that white noise appears to regulate the survival and extinction of model species. Comprehensive numerical simulations are consistent with mathematical results prognosticated by linear analysis. Overall, our study may provide a new insight into the mechanisms of emergence and mitigation of plankton blooms.
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Affiliation(s)
- Arindam Mandal
- Department of Mathematics, Indian Institute of Technology Ropar, Rupnagar 140001, Punjab, India
| | - Nazmul Sk
- Department of Mathematics, University of Kalyani, Kalyani 741235, India
| | - Saswati Biswas
- Department of Mathematics, School of Natural Sciences, Shiv Nadar Institution of Eminence (SNIoE), Gautam Buddha Nagar, Uttar Pradesh 201314, India.
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Antoni JS, Almandoz GO, Goldsmit J, Garcia MD, Flores-Melo X, Hernando MP, Schloss IR. Long-term studies on West Antarctic Peninsula phyto plankton blooms suggest range shifts between temperate and polar species. Glob Chang Biol 2024; 30:e17238. [PMID: 38497342 DOI: 10.1111/gcb.17238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/19/2024] [Accepted: 02/28/2024] [Indexed: 03/19/2024]
Abstract
The Western Antarctic Peninsula (WAP) experiences one of the highest rates of sea surface warming globally, leading to potential changes in biological communities. Long-term phytoplankton monitoring in Potter Cove (PC, King George Island, South Shetlands) from the 1990s to 2009 revealed consistently low biomass values, and sporadic blooms dominated by cold-water microplankton diatoms. However, a significant change occurred between 2010 and 2020, marked by a notable increase in intense phytoplankton blooms in the region. During this period, the presence of a nanoplankton diatom, Shionodiscus gaarderae, was documented for the first time. In some instances, this species even dominated the blooms. S. gaarderae is recognized for producing blooms in temperate waters in both hemispheres. However, its blooming in the northern Southern Ocean may suggest either a recent introduction or a range shift associated with rising temperatures in the WAP, a phenomenon previously observed in experimental studies. The presence of S. gaarderae could be viewed as a warning sign of significant changes already underway in the northern WAP plankton communities. This includes the potential replacement of microplankton diatoms by smaller nanoplankton species. This study, based on observations along the past decade, and compared to the previous 20 years, could have far-reaching implications for the structure of the Antarctic food web.
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Affiliation(s)
- Julieta S Antoni
- División Ficología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- CONICET, Buenos Aires, Argentina
| | - Gastón O Almandoz
- División Ficología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- CONICET, Buenos Aires, Argentina
| | - Jesica Goldsmit
- Maurice Lamontagne Institute, Fisheries and Oceans Canada, Mont-Joli, Quebec, Canada
- Arctic Research Division, Freshwater Institute, Fisheries and Oceans Canada, Winnipeg, Manitoba, Canada
- Ministère de l'Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs (MELCCFP), Québec City, Québec, Canada
| | - Maximiliano D Garcia
- CONICET, Buenos Aires, Argentina
- Agencia de Investigación Científica, Ministerio Público de La Pampa, Argentina, Santa Rosa, Argentina
| | - Ximena Flores-Melo
- Centro Austral de Investigaciones Científicas (CADIC)- CONICET, Ushuaia, Tierra del Fuego, Argentina
| | - Marcelo P Hernando
- CONICET, Buenos Aires, Argentina
- Comisión Nacional de Energía Atómica, San Martín, Buenos Aires, Argentina
| | - Irene R Schloss
- Centro Austral de Investigaciones Científicas (CADIC)- CONICET, Ushuaia, Tierra del Fuego, Argentina
- Instituto Antártico Argentino, San Martín, Buenos Aires, Argentina
- Universidad Nacional de Tierra del Fuego, Ushuaia, Tierra del Fuego, Argentina
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33
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Chao J, Li J, Kong M, Shao K, Tang X. Bacterio plankton diversity and potential health risks in volcanic lakes: A study from Arxan Geopark, China. Environ Pollut 2024; 342:123058. [PMID: 38042466 DOI: 10.1016/j.envpol.2023.123058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 10/29/2023] [Accepted: 11/26/2023] [Indexed: 12/04/2023]
Abstract
Bacterioplankton play a vital role in maintaining the functions and services of lake ecosystems. Understanding the diversity and distribution patterns of bacterioplankton, particularly the presence of potential pathogenic bacterial communities, is crucial for safeguarding human health. In this study, we employed 16S rRNA gene amplicon sequencing to investigate the diversity and geographic patterns of bacterioplankton communities, as well as potential pathogens, in eight volcanic lakes located in the Arxan UNESCO Global Geopark (in the Greater Khingan Mountains of China). Our results revealed that the bacterial communities primarily comprised Bacteroidota (45.3%), Proteobacteria (33.1%), and Actinobacteria (9.0%) at the phylum level. At the genus level, prominent taxa included Flavobacterium (31.5%), Acinetobacter (11.0%), Chryseobacterium (7.9%), and CL500-29 marine group (5.6%). Among the bacterioplankton, we identified 34 pathogen genera (165 amplicon sequence variants [ASVs]), with Acinetobacter (59.8%), Rahnella (18.3%), Brevundimonas (9.6%), and Pseudomonas (5.8%) being the most dominant. Our findings demonstrated distinct biogeographic patterns in the bacterial communities at the local scale, driven by a combination of dispersal limitation and environmental factors influenced by human activities. Notably, approximately 15.3% of the bacterioplankton reads in the Arxan lakes were identified as potential pathogens, underscoring the potential risks to public health in these popular tourist destinations. This study provides the first comprehensive insight into the diversity of bacterioplankton in mountain lake ecosystems affected by high tourist activity, laying the groundwork for effective control measures against bacterial pathogens.
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Affiliation(s)
- Jianying Chao
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
| | - Jian Li
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
| | - Ming Kong
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
| | - Keqiang Shao
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Xiangming Tang
- Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
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34
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Gutiérrez-Barral A, Teira E, Díaz-Alonso A, Justel-Díez M, Kaal J, Fernández E. Impact of wildfire ash on bacterio plankton abundance and community composition in a coastal embayment (Ría de Vigo, NW Spain). Mar Environ Res 2024; 194:106317. [PMID: 38160575 DOI: 10.1016/j.marenvres.2023.106317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/17/2023] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Wildfire ash can have an impact on coastal prokaryotic plankton. To understand the extent to which community composition and abundance of coastal prokaryotes are affected by ash, two ash addition experiments were performed. Ash from a massive wildfire that took place in the Ría de Vigo watershed in October 2017 was added to natural surface water samples collected in the middle sector of the ría during the summer of 2019 and winter of 2020, and incubated for 72 h, under natural water temperature and irradiance conditions. Plankton responses were assessed through chlorophyll a and bacterial abundance measurements. Prokaryotic DNA was analyzed using 16S rRNA gene partial sequencing. In summer, when nutrient concentrations were low in the ría, the addition of ash led to an increase in phytoplankton and bacterial abundance, increasing the proportions of Alteromonadales, Flavobacteriales, and the potentially pathogenic Vibrio, among other taxa. After the winter runoff events, nutrient concentrations in the Ría de Vigo were high, and only minor changes in bacterial abundance were detected. Our findings suggest that the compounds associated with wildfire ash can alter the composition of bacterioplanktonic communities, which is relevant information for the management of coastal ecosystems in fire-prone areas.
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Affiliation(s)
- Alberto Gutiérrez-Barral
- Centro de Investigación Mariña da Universidade de Vigo, Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias do Mar, Universidade de Vigo, Vigo, Galicia, Spain.
| | - Eva Teira
- Centro de Investigación Mariña da Universidade de Vigo, Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias do Mar, Universidade de Vigo, Vigo, Galicia, Spain
| | - Alexandra Díaz-Alonso
- Centro de Investigación Mariña da Universidade de Vigo, Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias do Mar, Universidade de Vigo, Vigo, Galicia, Spain
| | - Maider Justel-Díez
- Centro de Investigación Mariña da Universidade de Vigo, Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias do Mar, Universidade de Vigo, Vigo, Galicia, Spain
| | - Joeri Kaal
- Pyrolyscience, 15707, Santiago de Compostela, Spain
| | - Emilio Fernández
- Centro de Investigación Mariña da Universidade de Vigo, Departamento de Ecoloxía e Bioloxía Animal, Facultade de Ciencias do Mar, Universidade de Vigo, Vigo, Galicia, Spain
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35
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Lim YK, Lee KW, Hong SH, Park JG, Baek SH. Differential impact of planktonic and periphytic diatoms on aggregation and sinking of microplastics in a simulated marine environment. Mar Pollut Bull 2024; 199:115961. [PMID: 38171158 DOI: 10.1016/j.marpolbul.2023.115961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/05/2024]
Abstract
Aggregation between microalgae and microplastics (MPs) significantly influences the MPs distribution in marine environment. We investigated the effects of two diatoms, the planktonic Pseudo-nitzschia pungens and the periphytic Navicula sp., on the formation and sinking of aggregates when they were cultured with four different types of MPs: small and large polyethylene terephthalate (PET) fibers, and low-density and high-density polyethylene (PE) spheres. Navicula sp. formed aggregates with all MPs within one week, but P. pungens only formed aggregates with PE spheres after 9 weeks. The PE-Navicula sp. aggregates settled about 100 times faster than the PE-P. pungens aggregates (12.2 vs. 0.1 mm s-1), and this difference was most likely due to aggregate shape rather than size. Our findings indicate that the periphytic Navicula sp. had a greater effect on the settling of MPs than the planktonic P. pungens. These findings have implications for understanding the behavior of MPs in marine environments.
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Affiliation(s)
- Young Kyun Lim
- Ecological Risk Research Department, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, Republic of Korea
| | - Kyun-Woo Lee
- Department of Ocean Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea; Marine Biotechnology & Bioresource Research Department, Korea Institute of Ocean Science and Technology (KIOST), Busan 49111, Republic of Korea
| | - Sang Hee Hong
- Ecological Risk Research Department, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, Republic of Korea; Department of Ocean Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Jae Gon Park
- Department of Ocean Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea; Marine Biotechnology & Bioresource Research Department, Korea Institute of Ocean Science and Technology (KIOST), Busan 49111, Republic of Korea
| | - Seung Ho Baek
- Ecological Risk Research Department, Korea Institute of Ocean Science and Technology (KIOST), Geoje 53201, Republic of Korea; Department of Ocean Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
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36
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Saulnier J, Jose C, Lagarde F. Electrochemical techniques for label-free and early detection of growing microbial cells and biofilms. Bioelectrochemistry 2024; 155:108587. [PMID: 37839250 DOI: 10.1016/j.bioelechem.2023.108587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/06/2023] [Accepted: 10/10/2023] [Indexed: 10/17/2023]
Abstract
Over the past decades, the misuse or abuse of antimicrobial agents to prevent and/or control infections has led to increased resistance of microbes to treatments, and antimicrobial resistance is now a subject of major global concern. In some cases, microbes possess the capacity to attach to biotic or abiotic surfaces, and to produce a protective polymeric matrix, forming biofilms of higher resistance and virulence compared to planktonic forms. To avoid further excessive and inappropriate use of antimicrobials, and to propose new effective treatments, it is very important to detect planktonic microbes and microbial biofilms in their early growth stage and at the point of need. In this review, we provide an overview of currently available electrochemical techniques, in particular impedimetric and voltamperometric methods, highlighting recent advances in the field and illustrating with examples in antibiotic susceptibility testing and microbial biofilm monitoring.
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Affiliation(s)
- Joelle Saulnier
- Universite Claude Bernard Lyon 1, Institute of Analytical Sciences, CNRS, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Catherine Jose
- Universite Claude Bernard Lyon 1, Institute of Analytical Sciences, CNRS, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Florence Lagarde
- Universite Claude Bernard Lyon 1, Institute of Analytical Sciences, CNRS, 5 rue de la Doua, 69100 Villeurbanne, France.
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37
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Fernandez S, Ardura A, Martinez JL, Rick J, Machado-Schiaffino G, Garcia-Vazquez E. Plankton assessment across the distribution of West African hake and tuna based on eDNA metabarcoding. Mar Environ Res 2024; 194:106312. [PMID: 38150786 DOI: 10.1016/j.marenvres.2023.106312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/28/2023] [Accepted: 12/18/2023] [Indexed: 12/29/2023]
Abstract
The richness of plankton communities determines the fish productivity in the ocean, including important resources that rely on extractive fisheries, such as hakes (genus Merluccius) and tunas (genus Thunnus). Their preys forage on zooplankton, and the latter feed on phytoplankton. Inventories of plankton communities for scientific advice to sustainable fishing are essential in this moment of climate change. Plankton is generally inventoried using conventional methodologies based on large water volumes and visual morphological analyses of samples. In this study, we have employed metabarcoding on environmental DNA (eDNA) samples extracted from small water volumes for plankton inventory from twelve distant sampling stations in the East Atlantic Ocean. Zones rich in hake and tuna prey were detected from eDNA, and multivariate multiple regression analysis was able to predict those zones from diatom-based indices and planktonic diversity based on functional groups. Salinity was negatively correlated with the proportion of diatoms in phytoplankton, highlighting expected impacts of current global change on marine plankton communities. The results emphasise the importance of the plankton richness for fish productivity and support the utility of environmental DNA as a tool to monitor plankton composition changes.
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Affiliation(s)
- Sara Fernandez
- Department of Functional Biology, University of Oviedo, Spain
| | - Alba Ardura
- Department of Functional Biology, University of Oviedo, Spain
| | | | - Johannes Rick
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, AWI - Department of Coastal Ecology, Germany
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38
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Zhou J, Qiu H, Chen Y, Ma X, Yu G, Hong Y, Hu B. Fish-mussel-algae-bacteria model remedied eutrophication pollution: Application in Dongxiang district reservoir. Environ Pollut 2024; 342:123011. [PMID: 38036090 DOI: 10.1016/j.envpol.2023.123011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/14/2023] [Accepted: 11/19/2023] [Indexed: 12/02/2023]
Abstract
Eutrophication pollution has become an important ecological problem in China. Biological treatment is a common means to repair eutrophication pollution. Therefore, based on the biological manipulation technology, we put forward a fishing scheme for the Xiaoxiangshan and Shizishan reservoirs in Dongxiang District, which have been in a serious eutrophication pollution level for a long time, that is, to improve the quality and control water by operating fish, mussel, algae, and bacteria. The monitoring results in the middle stage of treatment showed that the structure of phytoplankton changed, and the degree of eutrophication pollution improved. In the later stage of treatment, the plankton diversity and richness of the two reservoirs increased significantly, the density and biomass of Cyanobacteria decreased significantly, and the degree of eutrophication pollution decreased to mesotrophic type. Overall, our research puts forward new ideas for the prevention and control of water eutrophication pollution and provides a reference for other kinds of water body treatment.
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Affiliation(s)
- Jie Zhou
- School of Life Science, Nanchang University, Nanchang, 330031, China
| | - Huimin Qiu
- School of Life Science, Nanchang University, Nanchang, 330031, China
| | - Yuanzhao Chen
- School of Life Science, Nanchang University, Nanchang, 330031, China
| | - Xin Ma
- School of Life Science, Nanchang University, Nanchang, 330031, China
| | - Guilan Yu
- School of Life Science, Nanchang University, Nanchang, 330031, China; Jiangxi Province Key Laboratory of Aquatic Animal Resources and Utilization, Nanchang University, Nanchang, 330031, China
| | - Yijiang Hong
- School of Life Science, Nanchang University, Nanchang, 330031, China; Jiangxi Province Key Laboratory of Aquatic Animal Resources and Utilization, Nanchang University, Nanchang, 330031, China
| | - Beijuan Hu
- School of Life Science, Nanchang University, Nanchang, 330031, China; Jiangxi Province Key Laboratory of Aquatic Animal Resources and Utilization, Nanchang University, Nanchang, 330031, China.
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Pałka I, Saniewska D, Bielecka L, Kobos J, Grzybowski W. Uptake and trophic transfer of selenium into phyto plankton and zooplankton of the southern Baltic Sea. Sci Total Environ 2024; 909:168312. [PMID: 37926260 DOI: 10.1016/j.scitotenv.2023.168312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/07/2023]
Abstract
Selenium (Se) is an essential trace element and displays a narrow range of concentration between essentiality and toxicity. Se plays an important role in ameliorating mercury toxicity in organisms. Despite this there are only a few reports concerning Se concentration in plankton, the first link in the trophic chain that determines the uptake and transfer of Se to subsequent trophic levels. This paper aimed to determine Se concentration in water, phytoplankton, and zooplankton in the Baltic Sea, and factors affecting Se absorption from the environment and its transfer to higher trophic levels. Sea water and plankton samples were collected from the Gulf of Gdańsk during 5 cruises (4 seasons: 2019-2022) at 4 research stations. An additional cruise was undertaken in July 2020 in the open waters of the southern Baltic Sea. The median Se concentrations in the Gulf of Gdańsk was 0.25 μg·dm-3. While the median of Se concentration in phytoplankton was 1.11 μg·g-1 and in zooplankton was 1.25 μg·g-1. The biomass of organisms in the phytoplankton and zooplankton in the Gulf of Gdańsk showed an important role in shaping Se concentration. Seasonal trends in Se concentration in zooplankton could be the result of taxa composition changes, changes to dietary intake of Se, changes in growth dilution, or potentially some combination of factors. The highest biomagnification rate occurred in the summer. In contrast, in autumn and winter, when plankton biomass was dominated by the ciliate species Mesodinium rubrum, the highest Se concentration in plankton was measured. Further scientific studies are needed into the active biocomponents of the Se concentration process, including Se speciation, to more fully understand the dynamics of Se concentrations in the pelagic food webs of this and other freshwater and marine systems.
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Affiliation(s)
- Izabela Pałka
- Institute of Oceanology, Polish Academy of Sciences, Marine Chemistry and Biochemistry Department, Powstańców Warszawy 55, 81-712 Sopot, Poland
| | - Dominika Saniewska
- University of Gdańsk, Faculty of Oceanography and Geography, Division of Marine Chemistry and Environmental Protection, Al. Marszałka Piłsudskiego 46, 81-378 Gdynia, Poland.
| | - Luiza Bielecka
- University of Gdańsk, Faculty of Oceanography and Geography, Division of Marine Ecosystems Functioning, Al. Marszałka Piłsudskiego 46, 81-378 Gdynia, Poland
| | - Justyna Kobos
- University of Gdańsk, Faculty of Oceanography and Geography, Division of Marine Biotechnology, Al. Marszałka Piłsudskiego 46, 81-378 Gdynia, Poland
| | - Waldemar Grzybowski
- University of Gdańsk, Faculty of Oceanography and Geography, Division of Marine Chemistry and Environmental Protection, Al. Marszałka Piłsudskiego 46, 81-378 Gdynia, Poland
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Giraldo C, Cresson P, MacKenzie K, Fontaine V, Loots C, Delegrange A, Lefebvre S. Insights into planktonic food-web dynamics through the lens of size and season. Sci Rep 2024; 14:1684. [PMID: 38243111 PMCID: PMC10798955 DOI: 10.1038/s41598-024-52256-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 01/16/2024] [Indexed: 01/21/2024] Open
Abstract
Knowledge of the trophic structure and variability of planktonic communities is a key factor in understanding food-web dynamics and energy transfer from zooplankton to higher trophic levels. In this study, we investigated how stable isotopes of mesozooplankton species varied seasonally (winter, spring, autumn) in relation to environmental factors and plankton size classes in a temperate coastal ecosystem. Our results showed that spring is characterized by the strongest vertical and size-structured plankton food-web, mainly fueled by the phytoplankton bloom. As a result, spring displayed the largest isotopic niche space and trophic divergence among species. On the contrary, both pelagic and benthic-derived carbon influenced low productive seasons (winter and autumn), resulting in more generalist strategies (trophic redundancy). Stable isotope mixing models were used to explore how different seasonal structures influenced the overall food web up to predatory plankton (i.e., mysids, chaetognaths, and fish larvae). Different feeding strategies were found in spring, with predators having either a clear preference for larger prey items (> 1 mm, for herring and dab larvae) or a more generalist diet (sprat and dragonets larvae). During low productive seasons, predators seemed to be more opportunistic, feeding on a wide range of size classes but focusing on smaller prey. Overall, the food-web architecture of plankton displayed different seasonal patterns linked to components at the base of the food web that shaped the main energy fluxes, either from phytoplankton or recycled material. Additionally, these patterns extended to carnivorous plankton, such as fish larvae, emphasizing the importance of bottom-up processes.
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Affiliation(s)
- Carolina Giraldo
- IFREMER, HMMN - Unité halieutique Manche-Mer du Nord, 62200, Boulogne sur mer, France.
| | - Pierre Cresson
- IFREMER, HMMN - Unité halieutique Manche-Mer du Nord, 62200, Boulogne sur mer, France
| | - Kirsteen MacKenzie
- IFREMER, HMMN - Unité halieutique Manche-Mer du Nord, 62200, Boulogne sur mer, France
| | - Virginie Fontaine
- IFREMER, HMMN - Unité halieutique Manche-Mer du Nord, 62200, Boulogne sur mer, France
- Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR 8187 - LOG - Laboratoire d'Océanologie et de Géosciences, 59000, Lille, France
| | - Christophe Loots
- IFREMER, HMMN - Unité halieutique Manche-Mer du Nord, 62200, Boulogne sur mer, France
| | - Alice Delegrange
- Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR 8187 - LOG - Laboratoire d'Océanologie et de Géosciences, 59000, Lille, France
| | - Sébastien Lefebvre
- Univ. Lille, CNRS, Univ. Littoral Côte d'Opale, IRD, UMR 8187 - LOG - Laboratoire d'Océanologie et de Géosciences, 59000, Lille, France
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Behrenfeld MJ, Bisson KM. Neutral Theory and Plankton Biodiversity. Ann Rev Mar Sci 2024; 16:283-305. [PMID: 37368954 DOI: 10.1146/annurev-marine-112122-105229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
The biodiversity of the plankton has been interpreted largely through the monocle of competition. The spatial distancing of phytoplankton in nature is so large that cell boundary layers rarely overlap, undermining opportunities for resource-based competitive exclusion. Neutral theory accounts for biodiversity patterns based purely on random birth, death, immigration, and speciation events and has commonly served as a null hypothesis in terrestrial ecology but has received comparatively little attention in aquatic ecology. This review summarizes basic elements of neutral theory and explores its stand-alone utility for understanding phytoplankton diversity. A theoretical framework is described entailing a very nonneutral trophic exclusion principle melded with the concept of ecologically defined neutral niches. This perspective permits all phytoplankton size classes to coexist at any limiting resource level, predicts greater diversity than anticipated from readily identifiable environmental niches but less diversity than expected from pure neutral theory, and functions effectively in populations of distantly spaced individuals.
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Affiliation(s)
- Michael J Behrenfeld
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, USA; ,
| | - Kelsey M Bisson
- Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon, USA; ,
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Mohanty TR, Das BK, Tiwari NK, Kumari S, Mondal K, Kundu S, Das Gupta S, Roy S, Baitha R, Ramteke MH, Swain HS, Upadhyay A. Diel variation of plankton in the highly impacted freshwater zone of Hooghly estuary in relation to ecological alteration. Environ Monit Assess 2024; 196:154. [PMID: 38225421 DOI: 10.1007/s10661-023-12274-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 12/29/2023] [Indexed: 01/17/2024]
Abstract
Plankton are promising ecological monitoring tool that responds quickly to any sort of aquatic ecological alteration, of which many of them are much susceptible to ecological variations. Therefore, monitoring shifts in plankton composition can indicate changes in water quality and aid to identify potential pollution sources. In the present study, the variation in plankton dynamics in relation to ecological variables were monitored in the freshwater zone of the Hooghly estuary from May 2020 to April 2021. The study was conducted in the interval of every six hours. i.e., at 6 A.M., 12 P.M., 6 P.M., and 12 A.M. The present finding revealed the occurrence of 54 phytoplankton and 20 zooplankton taxa/species. Diel variation revealed that among different time intervals, the highest abundance of phytoplankton was recorded 28,307 cells l-1 at 12 P.M, while the lowest was recorded 10,632 cells l-1 at 6 A.M. However, the highest zooplankton abundance was observed 804 ind l-1 at 6 A.M., and the lowest was recorded 156 ind l-1 at 6 P.M. The ANOVA (p < 0.05) analysis indicated significant diel variation for many planktonic genera. The CCA exhibited that most of the phytoplankton were influenced by multiple water quality variables such as temperature, turbidity, calcium, pH, salinity, DO, and nutrients. However, the majority of the zooplankton were affected by turbidity, total phosphorus, sulphate, calcium and available nitrogen. Significant seasonal variation in plankton composition has also been observed. The present study will help to determine the varying diel pattern of planktons in retort to alterations in the water quality parameters and varying ecological niches.
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Affiliation(s)
- Trupti Rani Mohanty
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Basanta Kumar Das
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120.
| | - Nitish Kumar Tiwari
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Suman Kumari
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Kausik Mondal
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Sourav Kundu
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Subhadeep Das Gupta
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Shreya Roy
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Raju Baitha
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Mitesh Hiradas Ramteke
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
| | - Himanshu Shekhar Swain
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
- ICAR-Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, India, 751002
| | - Aurobinda Upadhyay
- NMCG Laboratory, ICAR- Central Inland Fisheries Research Institute, Barrackpore, Kolkata, India, 700120
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Guimarães Durán CL, Lansac-Tôha FM, Meira BR, Santana LO, Oliveira FR, Matos MHDO, Velho LFM. Upstream cascade reservoirs drive temporal beta diversity increases through species loss in a dammed river. FEMS Microbiol Ecol 2024; 100:fiad165. [PMID: 38192043 PMCID: PMC10799717 DOI: 10.1093/femsec/fiad165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 11/21/2023] [Accepted: 01/03/2024] [Indexed: 01/10/2024] Open
Abstract
Changes in the biodiversity of aquatic environments over time and space due to human activities are a topic of theoretical and conservational interest in ecology. Thus, variation in taxonomic beta diversity of the planktonic ciliates community was investigated along a temporal and spatial gradient in two subsystems of a Neotropical floodplain, one impacted by dams (Paraná) and the other free of them along its course (Ivinhema). For the spatial analysis, the Paraná subsystem did not show a significant decrease in beta diversity, presenting a pattern like that observed for the Ivinhema subsystem. Therefore, biotic homogenization was not observed for the ciliate's community downstream of the dams. It was noted that there was a fluctuation in the relevance of the components of beta diversity, regardless of the subsystem analyzed. For the temporal analysis there was a significant change in species composition from the first to the last year investigated, essentially for the subsystem impacted by dams, and that this was determined mainly by species loss. Although spatial beta diversity remained high without a clear process of biotic homogenization, dams promoted remarkable changes in ciliate species composition over the years mainly by continuous loss of species.
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Affiliation(s)
- Carolina Leite Guimarães Durán
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Department of Biology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, CEP 87020-900. Maringá, Parana State, Brazil
| | - Fernando Miranda Lansac-Tôha
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Department of Biology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, CEP 87020-900. Maringá, Parana State, Brazil
| | - Bianca Ramos Meira
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Department of Biology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, CEP 87020-900. Maringá, Parana State, Brazil
| | - Loiani Oliveira Santana
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Department of Biology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, CEP 87020-900. Maringá, Parana State, Brazil
| | - Felipe Rafael Oliveira
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Department of Biology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, CEP 87020-900. Maringá, Parana State, Brazil
| | - Matheus Henrique de Oliveira Matos
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Department of Biology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, CEP 87020-900. Maringá, Parana State, Brazil
| | - Luiz Felipe Machado Velho
- Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais (PEA), Department of Biology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá (UEM). Av. Colombo, 5790, CEP 87020-900. Maringá, Parana State, Brazil
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Monteiro LC, Vieira LCG, Bernardi JVE, Bastos WR, de Souza JPR, Recktenvald MCNDN, Nery AFDC, Oliveira IADS, Cabral CDS, Moraes LDC, Filomeno CL, de Souza JR. Local and landscape factors influencing mercury distribution in water, bottom sediment, and biota from lakes of the Araguaia River floodplain, Central Brazil. Sci Total Environ 2024; 908:168336. [PMID: 37949140 DOI: 10.1016/j.scitotenv.2023.168336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/01/2023] [Accepted: 11/03/2023] [Indexed: 11/12/2023]
Abstract
Mercury (Hg) is a chemical element widely present in the Earth's crust. However, its high toxicity and ability to accumulate in organisms and biomagnify through food chains characterize it as a global pollutant of primary control. We assessed total mercury concentrations ([THg]) in abiotic and biotic compartments from 98 floodplain lakes associated with the Araguaia River and six tributaries (Midwest Brazil). [THg] quantification in water was performed by cold vapor atomic fluorescence spectroscopy. [THg] in bottom sediment was assessed using cold vapor generation atomic absorption spectrophotometry, while [THg] in macrophyte, periphyton, and plankton were quantified by thermal decomposition atomic absorption spectrometry. Hotspots of [THg] in water, bottom sediment, and macrophytes were determined in areas impacted by pasture and urban areas. In contrast, hotspots of [THg] in periphyton and forest fires were determined in preserved areas downstream. [THg] in plankton did not show a clear spatial distribution pattern. The mean bioaccumulation factor order was plankton (2.3 ± 1.8) > periphyton (1.3 ± 0.9) > macrophytes (0.7 ± 0.4) (KW = 55.09, p < 0.0001). Higher [THg] in water and bottom sediment were associated with high pH (R2adj = 0.118, p = 0.004) and organic matter (R2adj = 0.244, p < 0.0001). [THg] in macrophytes were positively influenced by [THg] in water (R2adj = 0.063, p = 0.024) and sediment (R2adj = 0.105, p = 0.007). [THg] in periphyton are positively related to forest fires (R2adj = 0.156, p = 0.009) and [THg] in macrophytes (R2adj = 0.061, p = 0.03) and negatively related to lake depth (R2adj = 0.045, p = 0.02). The transfer of Hg from water and sediment to the biota is limited. However, the progressive increase of the bioaccumulation factor between macrophyte, periphyton, and plankton may indicate Hg biomagnification along the food chain of the Araguaia River floodplain.
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Affiliation(s)
- Lucas Cabrera Monteiro
- Programa de Pós-Graduação em Ecologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil.
| | - Ludgero Cardoso Galli Vieira
- Núcleo de Estudos e Pesquisas Ambientais e Limnológicas, Faculdade UnB Planaltina, Universidade de Brasília, Planaltina, DF, Brazil
| | - José Vicente Elias Bernardi
- Laboratório de Geoestatística e Geodésia, Faculdade UnB Planaltina, Universidade de Brasília, Planaltina, DF, Brazil
| | | | | | | | | | | | - Cássio da Silva Cabral
- Laboratório de Biogeoquímica Ambiental, Universidade Federal de Rondônia, Porto Velho, RO, Brazil
| | - Lilian de Castro Moraes
- Programa de Pós-Graduação em Ciências Ambientais, Faculdade UnB Planaltina, Universidade de Brasília, Planaltina, DF, Brazil
| | - Cleber Lopes Filomeno
- Central Análítica, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil
| | - Jurandir Rodrigues de Souza
- Laboratório de Química Analítica e Ambiental, Instituto de Química, Universidade de Brasília, Brasília, DF, Brazil
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Albarico FPJB, Lim YC, Chen CW, Chen CF, Wang MH, Dong CD. Linking seasonal plankton succession and cellular trace metal dynamics in marine assemblages. Sci Total Environ 2024; 907:167805. [PMID: 37858810 DOI: 10.1016/j.scitotenv.2023.167805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 04/04/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023]
Abstract
Factors affecting trace metal dynamics in marine plankton still need to be fully understood. Underlying mechanisms affecting cellular metal distribution, seasonal changes, and the influence of plankton community structure are poorly explored. This study comprehensively analyzed the seasonal changes in environmental factors, plankton community structure, and their impact on plankton cellular metal dynamics. Plankton samples were isolated, and trace metals (Cr, Mn, Fe, Co, Ni, Cu, As, Cd, Hg, and Pb) were analyzed with an inductively coupled plasma mass spectrometer (ICP-MS). Plankton community structure significantly changed with seasons (p < 0.05), which were mainly driven by temperature (seasonal change) and nutrients (eutrophication). Mean plankton cellular trace metals did not significantly change (p > 0.05) in the study area but were higher along estuaries likely due to differences in metal influx from rivers. However, their distribution patterns significantly differ between the wet and dry seasons, likely influenced by the changes in community structure and anthropogenic influx. Cellular trace metals, particularly in phytoplankton, strongly correlated with selected species suggesting the impacts of community structure in trace metal distribution. Hence, the influence of environmental factors in driving plankton succession may have caused a ripple effect on cellular trace metal distribution, especially in phytoplankton. However, both blooming species Skeletonema and Chaetoceros (diatoms) showed a contrasting relationship with cellular metals, suggesting the cooccurrence of bioaccumulation or biodilution mechanisms. This study shows the potential influence of community structure in cellular trace metal dynamics for marine plankton assemblages. However, more than plankton abundance and functional diversity, i.e., species diversity, might be needed to assess the community-level impacts on cellular metals.
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Affiliation(s)
- Frank Paolo Jay B Albarico
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; College of Fisheries and Allied Sciences, Northern Negros State College of Science and Technology, Sagay City 6122, Philippines
| | - Yee Cheng Lim
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Chiu-Wen Chen
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Chih-Feng Chen
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Ming-Huang Wang
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan
| | - Cheng-Di Dong
- Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan.
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Zhang H, Hellweger FL, Luo H. Genome reduction occurred in early Prochlorococcus with an unusually low effective population size. ISME J 2024; 18:wrad035. [PMID: 38365237 PMCID: PMC10837832 DOI: 10.1093/ismejo/wrad035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/14/2023] [Accepted: 12/20/2023] [Indexed: 02/18/2024]
Abstract
In the oligotrophic sunlit ocean, the most abundant free-living planktonic bacterial lineages evolve convergently through genome reduction. The cyanobacterium Prochlorococcus responsible for 10% global oxygen production is a prominent example. The dominant theory known as "genome streamlining" posits that they have extremely large effective population sizes (Ne) such that selection for metabolic efficiency acts to drive genome reduction. Because genome reduction largely took place anciently, this theory builds on the assumption that their ancestors' Ne was similarly large. Constraining Ne for ancient ancestors is challenging because experimental measurements of extinct organisms are impossible and alternatively reconstructing ancestral Ne with phylogenetic models gives large uncertainties. Here, we develop a new strategy that leverages agent-based modeling to simulate the changes in the genome-wide ratio of radical to conservative nonsynonymous nucleotide substitution rate (dR/dC) in a possible range of Ne in ancestral populations. This proxy shows expected increases with decreases of Ne only when Ne falls to about 10 k - 100 k or lower, magnitudes characteristic of Ne of obligate endosymbiont species where drift drives genome reduction. Our simulations therefore strongly support a scenario where the primary force of Prochlorococcus genome reduction is drift rather than selection.
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Affiliation(s)
- Hao Zhang
- Simon F. S. Li Marine Science Laboratory, School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, 999077, Hong Kong SAR
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, 518000, China
| | - Ferdi L Hellweger
- Water Quality Engineering, Technical University of Berlin, Berlin, 10623, Germany
| | - Haiwei Luo
- Simon F. S. Li Marine Science Laboratory, School of Life Sciences and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, 999077, Hong Kong SAR
- Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin, 999077, Hong Kong SAR
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Latz MAC, Andersson A, Brugel S, Hedblom M, Jurdzinski KT, Karlson B, Lindh M, Lycken J, Torstensson A, Andersson AF. A comprehensive dataset on spatiotemporal variation of microbial plankton communities in the Baltic Sea. Sci Data 2024; 11:18. [PMID: 38168085 PMCID: PMC10761891 DOI: 10.1038/s41597-023-02825-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 12/06/2023] [Indexed: 01/05/2024] Open
Abstract
The Baltic Sea is one of the largest brackish water environments on earth and is characterised by pronounced physicochemical gradients and seasonal dynamics. Although the Baltic Sea has a long history of microscopy-based plankton monitoring, DNA-based metabarcoding has so far mainly been limited to individual transect cruises or time-series of single stations. Here we report a dataset covering spatiotemporal variation in prokaryotic and eukaryotic microbial communities and physicochemical parameters. Within 13-months between January 2019 and February 2020, 341 water samples were collected at 22 stations during monthly cruises along the salinity gradient. Both salinity and seasonality are strongly reflected in the data. Since the dataset was generated with both metabarcoding and microscopy-based methods, it provides unique opportunities for both technical and ecological analyses, and is a valuable biodiversity reference for future studies, in the prospect of climate change.
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Affiliation(s)
- Meike A C Latz
- KTH Royal Institute of Technology, Department of Gene Technology, Science for Life Laboratory, Stockholm, Sweden.
- University of Copenhagen, Department of Plant and Environmental Sciences, Frederiksberg C, Denmark.
| | - Agneta Andersson
- Umeå University, Department of Ecology and Environmental Sciences, Umeå, Sweden
- Umeå Marine Sciences Centre, Umeå University, SE-905 71, Hörnefors, Sweden
| | - Sonia Brugel
- Umeå University, Department of Ecology and Environmental Sciences, Umeå, Sweden
- Umeå Marine Sciences Centre, Umeå University, SE-905 71, Hörnefors, Sweden
| | - Mikael Hedblom
- Swedish Meteorological and Hydrological Institute, Community Planning Services - Oceanography, Västra Frölunda, Sweden
| | - Krzysztof T Jurdzinski
- KTH Royal Institute of Technology, Department of Gene Technology, Science for Life Laboratory, Stockholm, Sweden
| | - Bengt Karlson
- Swedish Meteorological and Hydrological Institute, Oceanographic Research, Västra Frölunda, Sweden
| | - Markus Lindh
- Swedish Meteorological and Hydrological Institute, Community Planning Services - Oceanography, Västra Frölunda, Sweden
| | - Jenny Lycken
- Swedish Meteorological and Hydrological Institute, Community Planning Services - Oceanography, Västra Frölunda, Sweden
| | - Anders Torstensson
- Swedish Meteorological and Hydrological Institute, Community Planning Services - Oceanography, Västra Frölunda, Sweden
| | - Anders F Andersson
- KTH Royal Institute of Technology, Department of Gene Technology, Science for Life Laboratory, Stockholm, Sweden.
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48
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Taucher J, Lechtenbörger AK, Bouquet JM, Spisla C, Boxhammer T, Minutolo F, Bach LT, Lohbeck KT, Sswat M, Dörner I, Ismar-Rebitz SMH, Thompson EM, Riebesell U. The appendicularian Oikopleura dioica can enhance carbon export in a high CO 2 ocean. Glob Chang Biol 2024; 30:e17020. [PMID: 37947122 DOI: 10.1111/gcb.17020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 10/06/2023] [Accepted: 10/08/2023] [Indexed: 11/12/2023]
Abstract
Gelatinous zooplankton are increasingly recognized to play a key role in the ocean's biological carbon pump. Appendicularians, a class of pelagic tunicates, are among the most abundant gelatinous plankton in the ocean, but it is an open question how their contribution to carbon export might change in the future. Here, we conducted an experiment with large volume in situ mesocosms (~55-60 m3 and 21 m depth) to investigate how ocean acidification (OA) extreme events affect food web structure and carbon export in a natural plankton community, particularly focusing on the keystone species Oikopleura dioica, a globally abundant appendicularian. We found a profound influence of O. dioica on vertical carbon fluxes, particularly during a short but intense bloom period in the high CO2 treatment, during which carbon export was 42%-64% higher than under ambient conditions. This elevated flux was mostly driven by an almost twofold increase in O. dioica biomass under high CO2 . This rapid population increase was linked to enhanced fecundity (+20%) that likely resulted from physiological benefits of low pH conditions. The resulting competitive advantage of O. dioica resulted in enhanced grazing on phytoplankton and transfer of this consumed biomass into sinking particles. Using a simple carbon flux model for O. dioica, we estimate that high CO2 doubled the carbon flux of discarded mucous houses and fecal pellets, accounting for up to 39% of total carbon export from the ecosystem during the bloom. Considering the wide geographic distribution of O. dioica, our findings suggest that appendicularians may become an increasingly important vector of carbon export with ongoing OA.
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Affiliation(s)
- Jan Taucher
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | | | - Jean-Marie Bouquet
- Department of Biological Sciences, University of Bergen, Bergen, Norway
- Michael Sars Centre for Marine Molecular Biology, University of Bergen, Bergen, Norway
| | - Carsten Spisla
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | - Tim Boxhammer
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | - Fabrizio Minutolo
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
- Institute of Carbon Cycles, Helmholtz-Centre Hereon, Geesthacht, Germany
| | - Lennart Thomas Bach
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia
| | - Kai T Lohbeck
- Limnological Institute, University of Konstanz, Konstanz, Germany
| | - Michael Sswat
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | - Isabel Dörner
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | | | - Eric M Thompson
- Department of Biological Sciences, University of Bergen, Bergen, Norway
- Michael Sars Centre for Marine Molecular Biology, University of Bergen, Bergen, Norway
| | - Ulf Riebesell
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
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49
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Russo L, Bellardini D, Steinberg DK, Congestri R, Lomas MW, D'Alelio D. Long-term oscillations in the normalized biomass-size spectrum reveal the impact of oligotrophication on zoo plankton trophic structure in the North Atlantic Subtropical Gyre. Mar Environ Res 2024; 193:106295. [PMID: 38118377 DOI: 10.1016/j.marenvres.2023.106295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/30/2023] [Accepted: 12/04/2023] [Indexed: 12/22/2023]
Abstract
Ocean warming of the North Atlantic Subtropical Gyre (NASG) induced oligotrophication and a decrease in integrated net primary production during the 2010s, potentially affecting higher trophic levels. We analyzed long-term records (1994-2019) of daytime and nighttime zooplankton biomass in five size classes from the NASG. Daytime biomass decreased in the three largest size classes during the 2010s, while decrease in nighttime biomass was less evident due to the relative stability in diel vertical migrator biomass. We used the normalized biomass size spectrum (NBSS) to estimate the relative transfer efficiency between trophic levels. The steepness of the NBSS slope at the end of the time series increased by 14% (daytime) and 24% (nighttime) from the maximum observed annual average values (2011 and 2009, respectively). This suggests oligotrophication during the 2010s led to a significant reduction in the transfer of biomass across trophic levels, with negative impacts on the NASG planktonic food web.
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Affiliation(s)
- Luca Russo
- Program in Evolutionary Biology and Ecology, Department of Biology, University of Rome 'Tor Vergata', Via della Ricerca scientifica 1, 00133, Rome, Italy.
| | - Daniele Bellardini
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121, Naples, Italy; DiSTAV, Department of Earth, Environment and Life Sciences, University of Genoa, Corso Europa 26, 16132, Genoa, Italy.
| | - Deborah K Steinberg
- Coastal & Ocean Processes Section, Virginia Institute of Marine Science, William & Mary, Gloucester Point, VA, 23062, USA.
| | - Roberta Congestri
- Laboratory of Biology of Algae, Department of Biology, University of Rome 'Tor Vergata', Via Cracovia 1, 00133, Rome, Italy.
| | - Michael W Lomas
- Bigelow Laboratory for Ocean Sciences, 60 Bigelow Drive, East Boothbay, ME, 04544, USA.
| | - Domenico D'Alelio
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121, Naples, Italy; NBFC, National Biodiversity Future Center, Piazza Marina 61, 90133, Palermo, Italy.
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50
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Silva MD, Melo LDR. Phage-Host Interaction Analysis Using Flow Cytometry. Methods Mol Biol 2024; 2734:133-140. [PMID: 38066366 DOI: 10.1007/978-1-0716-3523-0_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Phage-host interactions are commonly evaluated by culture-based methods. However, these techniques are very laborious and time-consuming. Therefore, other time-efficient, not labor-intensive, and cost-effective methods have been developed.This chapter describes the methodology used to assess the susceptibility of planktonic cultures of bacteria to phage infection and to study their interactions over time by flow cytometry.
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Affiliation(s)
- Maria Daniela Silva
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
- LABBELS - Associate Laboratory, Braga & Guimarães, Portugal
| | - Luís D R Melo
- CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal.
- LABBELS - Associate Laboratory, Braga & Guimarães, Portugal.
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