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Danovaro R, Cocozza di Montanara A, Corinaldesi C, Dell'Anno A, Illuminati S, Willis TJ, Gambi C. Bioaccumulation and biomagnification of heavy metals in marine micro-predators. Commun Biol 2023; 6:1206. [PMID: 38012231 PMCID: PMC10682414 DOI: 10.1038/s42003-023-05539-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 11/03/2023] [Indexed: 11/29/2023] Open
Abstract
Nematodes represent >3/5 of the abundance of the world's metazoans and usually account for nearly 90% of the total benthic fauna, playing a key ecological role in the benthic ecosystem functioning on a global scale. These small metazoans include a relevant number of microscopic predators and, in turn, are the most abundant preys of macro-megafauna and fish juveniles thus playing a key role in marine food webs. Here, using two independent approaches, we test the bioaccumulation in marine nematodes of several heavy metals present in contaminated sediments. We report here that nematodes, despite their short life cycle and small size, bioaccumulate significantly heavy metals. Bioaccumulation increases from deposit feeders and microalgal grazers to predators of microbes and other tiny metazoans. These results suggest that nematodes also contribute to their biomagnification along the food webs and can contribute to increase the transfer of contaminants from the sediments to larger organisms.
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Affiliation(s)
- Roberto Danovaro
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy.
- Nature Biodiversity Future Centre, Palermo, Italy.
| | - Adele Cocozza di Montanara
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
- Dipartimento di Scienze e Tecnologie, Università degli Studi di Napoli Parthenope, Centro Direzionale, 80143, Napoli, Italy
| | - Cinzia Corinaldesi
- Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Antonio Dell'Anno
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Silvia Illuminati
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
| | - Trevor J Willis
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Fano Marine Center, 61032, Fano, Italy
| | - Cristina Gambi
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy
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Nguyen Thi My Y, Vanreusel A, Mevenkamp L, Laforce B, Lins L, Tran Thanh T, Nguyen Van D, Ngo Xuan Q. The effect of a dam on the copper accumulation in estuarine sediment and associated nematodes in a Mekong estuary. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:772. [PMID: 36255510 DOI: 10.1007/s10661-022-10183-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 01/22/2022] [Indexed: 06/16/2023]
Abstract
Dam construction across the main flow of an estuary can greatly contribute to a high accumulation of inorganic contaminants. However, it remains unknown to what extend externally available heavy metals are incorporated into biota living in those contaminated environments. In this study, the heavy metal copper was investigated both in the sediment and in the tissues of nematodes taken from the subtidal zone in the Ba Lai estuary where a dam is present, and compared with samples from the dam-free Ham Luong estuary, both part of the Mekong Delta. Samples were taken in the dry season of 2017 in four stations in the Ba Lai estuary with two stations in the downstream part from the dam and two upstream. Similar locations with respect to the distance were sampled in the dam-free estuary. The internal copper concentration in nematodes was measured by applying micro X-ray fluorescence. The results showed that both internal and sediment copper concentrations were different between the two estuaries and among estuarine sections. The highest copper concentration in nematodes was found in the upstream section of Ba Lai estuary where the greatest accumulation of sedimentary copper was observed, while the dammed downstream part was lowest in internal copper accumulation. Moreover, there was more variation in the copper levels between the two sections within the dammed estuary compared to those in Ham Luong. These observations might point to the contribution of the Ba Lai dam to the increase of copper contaminants in the benthic environment leading to accumulation in nematodes.
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Affiliation(s)
- Yen Nguyen Thi My
- Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan Str., Dist. 3, Ho Chi Minh City, Vietnam
- Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium
| | - Ann Vanreusel
- Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium
| | - Lisa Mevenkamp
- Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium
| | - Brecht Laforce
- XMI Group, Department of Chemistry, Ghent University, Krijgslaan 281, S12, B-9000, Ghent, Belgium
| | - Lidia Lins
- Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium
| | - Thai Tran Thanh
- Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan Str., Dist. 3, Ho Chi Minh City, Vietnam
| | - Dong Nguyen Van
- Department of Analytical Chemistry, Faculty of Chemistry, University of Science - Vietnam National University Ho Chi Minh City, Nguyen Van Cu Str., Dist. 5, Ho Chi Minh City, Vietnam
| | - Quang Ngo Xuan
- Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan Str., Dist. 3, Ho Chi Minh City, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.
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Geo-Environmental Characterisation of High Contaminated Coastal Sites: The Analysis of Past Experiences in Taranto (Southern Italy) as a Key for Defining Operational Guidelines. LAND 2022. [DOI: 10.3390/land11060878] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Despite its remarkable geomorphological, ecological, and touristic value, the coastal sector of the Apulia region (Southern Italy) hosts three of the main contaminated Italian sites (Sites of National Interest, or SINs), for which urgent environmental remediation and reclamation actions are required. These sites are affected by intense coastal modification and diffuse environmental pollution due to the strong industrialisation and urbanisation processes that have been taking place since the second half of the XIX century. The Apulian coastal SINs, established by the National Law 426/1998 and delimited by the Ministerial Decree of 10 January 2000, include large coastal sectors and marine areas, which have been deeply investigated by the National Institution for the Environmental Research and Protection (ISPRA) and the Regional Agency for the Prevention and Protection of the Environment (ARPA) with the aim of obtaining a deep environmental characterisation of the marine matrices (sediments, water, and biota). More recently, high-resolution and multidisciplinary investigations focused on the geo-environmental characterisation of the coastal basins in the SIN Taranto site have been funded by the “Special Commissioner for the urgent measures of reclamation, environmental improvements, and redevelopment of Taranto”. In this review, we propose an overview of the investigations carried out in the Apulian SINs for the environmental characterisation of the marine matrices, with special reference to the sea bottom and sediments. Based on the experience gained in the previous characterisation activities, further research is aimed at defying a specific protocol of analysis for supporting the identification of priority actions for an effective and efficient geo-morphodynamic and environmental characterisation of the contaminated coastal areas, with special reference to geomorphological, sedimentological, and geo-dynamic features for which innovative and high-resolution investigations are required.
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Ng WL, Chen CA, Mustafa S, Soo CL, Liao YC, Shih TW. Free-living marine nematodes community structure in the conservation area (Chaojing Park) and its adjacent area of Keelung, Taiwan. PLoS One 2022; 17:e0268691. [PMID: 35622785 PMCID: PMC9140311 DOI: 10.1371/journal.pone.0268691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 05/04/2022] [Indexed: 11/24/2022] Open
Abstract
Studies conducted in the same seas or even study sites nearby each other, showed very different community structure, implying the patchiness of free-living marine nematodes which may be related to the sedimentary environment such as sediment type and food availability of the study area. This study was motivated by the concerns about the impacts of high level of anthropogenic activities on Chaojing Park (gazetted as Wanghaixiang’s Chao-Jing Bay Resource Conservation Area (WCJBRA) in 2016). The present study provides baseline knowledge of free-living marine nematode community structure in WCJBRA and identify potential marine nematodes as bioindicators to indicate possible impacts of the anthropogenic activities to the Chaojing Park. A total of 15 stations were selected in the subtidal zones of WCJBRA and its adjacent area. Marine nematode sample collection was carried out on the 13th and 14th of September 2019 using SCUBA diving technique. Results showed positive correlation between nematode density and medium sand (500μm-1.0mm). Presence of certain species such as Daptonema sp., Pomponema sp. and Innocuonema sp. indicates presence of disturbances in S12 and S13. Several species also showed potential to be introduced as indicator for healthy environment subjected to further studies on nematode-pollutants relationship, particularly on autecology as per se. Higher species diversity, H’ index of S1-S8 and S11 was categorised as Good Condition; followed by station with moderate species diversity index (S9, S10, S14 –Moderate Condition) zone; and lastly S12, S13 and S15 (Poor Condition).
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Affiliation(s)
- Wei-Ling Ng
- Borneo Marine Research Institute, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
| | - Cheng-Ann Chen
- Borneo Marine Research Institute, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
- * E-mail:
| | - Saleem Mustafa
- Borneo Marine Research Institute, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
| | - Chen-Lin Soo
- Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Sabah, Malaysia
| | - Yun-Chih Liao
- Department of Earth and Life Science, University of Taipei, Taipei, Taiwan (R.O.C.)
| | - Tung-Wei Shih
- National Museum of Marine Science & Technology, Keelung, Taiwan (R.O.C.)
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Palanques A, Paradis S, Puig P, Masqué P, Iacono CL. Effects of bottom trawling on trace metal contamination of sediments along the submarine canyons of the Gulf of Palermo (southwestern Mediterranean). THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 814:152658. [PMID: 34954182 DOI: 10.1016/j.scitotenv.2021.152658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
Submarine canyons are preferential pathways for transport of particulate matter and contaminants from the shelf to the deep sea. The Gulf of Palermo continental margin has a very narrow shelf (about 2-3 km wide on average) and is incised by several submarine canyons that favour shelf-slope sediment transfer. A sediment core collected on the outer shelf and six sediment cores taken at different depths along the Oreto, Eleuterio and Anerella submarine canyons were analysed to study the transfer and historical record of trace metal contamination in the Gulf of Palermo continental margin. Trace metals, major elements, organic carbon and sediment grain size were analysed in these cores, which were dated with 210Pb to assess their historical compositional evolution since the late 19th century. Hg, Pb, Cu, Zn and Cd content increased until the 1970s and 1980s, associated with the increase in urbanization and industrial activities in the Palermo area, and Hg was the contaminant that reached the highest enrichments. However, the increasing trend of these metals contamination was reversed in the 1970s and 1980s, coinciding with drastic changes in the terrigenous content and grain size of sediments in the canyon axes. These changes occurred when bottom trawling fleets expanded to deeper fishing grounds equipped with powerful trawlers around the Gulf of Palermo canyon heads and flanks and along the Oreto canyon axis. Bottom trawlers have resuspended large amounts of sediment, which have been transferred into the canyons since the 1970s and 1980s and have thus increased sediment accumulation rates. This resuspended sediment has been mixing with the sediment transferred and accumulated along the canyons, diluting and reducing its trace metal contamination levels since the expansion of the bottom trawling fleets.
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Affiliation(s)
- Albert Palanques
- Institute of Marine Sciences, Consejo Superior de Investigaciones Científicas, Barcelona 08003, Spain.
| | - Sarah Paradis
- Institute of Environmental Science and Technology (ICTA) and Physics Department, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain; Geological Institute, Department of Earth Sciences, ETH Zürich, 8092 Zürich, Switzerland
| | - Pere Puig
- Institute of Marine Sciences, Consejo Superior de Investigaciones Científicas, Barcelona 08003, Spain
| | - Pere Masqué
- Institute of Environmental Science and Technology (ICTA) and Physics Department, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain; International Atomic Energy Agency, 4a Quai Antoine 1er, 98000, Principality of Monaco, Monaco; School of Natural Sciences, Centre for Marine Ecosystems Research, Edith Cowan University, Joondalup, WA 6027, Australia
| | - Claudio Lo Iacono
- Institute of Marine Sciences, Consejo Superior de Investigaciones Científicas, Barcelona 08003, Spain
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Mahmoudi M, Bejaoui W, Ali MB, Hedfi A, Almalki M, Essid N, Mahmoudi E, Rizk R, Pacioglu O, Urkmez D, Dervishi A, Boufahja F. How effective is wastewater treatment? A case study under the light of taxonomic and feeding features of meiobenthic nematodes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:2566-2578. [PMID: 34370198 DOI: 10.1007/s11356-021-15844-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
A microcosm bioassay was designed to assess the efficacy of wastewater treatment methods used in sewage plants. The taxonomic and feeding characteristics of a meiobenthic nematode assemblage from Ghar El Melh lagoon (Tunisia) were used to achieve this goal. Nematode assemblages were exposed for 30 days to untreated wastewater (UW) obtained from the sewage treatment plant of Sidi Ahmed (Tunisia) and three mixtures with treated wastewater (TW33 = 33%, TW66 = 66%, and TW100 = 100%). Concerning the nematode abundance, the exposure to either treated wastewater (TW33-100) or untreated wastewater (UW) had no significant effect. In contrast, Shannon-Wiener index and Pielou's Evenness were clearly reduced by contamination with both types of wastewater, with a more pronounced negative impact prior to treatment in the sewage plant. The multivariate analyzes revealed a change in the taxonomic composition of the nematofauna in response to the contamination by untreated or treated wastewater. The relative abundances of species in wastewater replicates compared to controls reflected this taxonomic restructuring. Finally, Ascolaimus elongatus, Terschellingia communis, and Kraspedonema octogoniata were less represented in all experimentally treated units and could be considered as 'sensitive taxa to wastewater'. While, Paracomesoma dubium, appears to be a 'tolerant and/or opportunistic' species, showing increased relative abundances under all wastewater treatments.
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Affiliation(s)
- Mohamed Mahmoudi
- Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Wiem Bejaoui
- LR Biotechnology and Bio-Geo Resources Valorization (LR11ES31c) Higher Institute for Biotechnology, University of Manouba Biotechnopole of Sidi Thabet, 2020, Sidi Thabet, Ariana, Tunisia
| | - Manel Ben Ali
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Amor Hedfi
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Mohammed Almalki
- Department of Biology, College of Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Naceur Essid
- Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Ezzeddine Mahmoudi
- Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia
| | - Roquia Rizk
- Research Center for Biochemical, Environmental and Chemical Engineering, Sustainability Solutions Research Lab, University of Pannonia, Egyetem str. 10, Veszprém, H-8200, Hungary
- Biochemisrty Department, Faculty of Agriculture, Cairo University, Cairo, Egypt
| | - Octavian Pacioglu
- National Institute of Research and Development for Biological Sciences, Bucharest, Romania
| | - Derya Urkmez
- Sinop University, Scientific and Technological Research and Application Center, TR57000, Sinop, Turkey
| | - Aida Dervishi
- Department of Biotechnology, Faculty of Natural Sciences, University of Tirana, Zog I, 25/1, 1001, Tirana, Albania
| | - Fehmi Boufahja
- Faculty of Sciences of Bizerte, LR01ES14 Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia.
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Essid N, Gharbi R, Harrath AH, Mansour L, Mahmoudi E, Beyrem H, Ansari KGMT, Boufahja F. Toxicity of a chromium-enriched superfood, Spirulina platensis, assessed by taxonomic and morpho-functional diversity of marine meiofauna. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 262:114350. [PMID: 32197121 DOI: 10.1016/j.envpol.2020.114350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 02/21/2020] [Accepted: 03/06/2020] [Indexed: 06/10/2023]
Abstract
A laboratory bioassay was conducted to investigate the ecotoxicity of a chromium-enriched superfood, Spirulina platensis, on the meiofauna collected from the Ghar El Melh lagoon, Tunisia. After 1 month of exposure, the abundances of meiobenthic taxa and the taxonomic and morpho-functional diversity of nematodes showed significant differences between the Spirulina and Spirulina + chromium groups. The nematodes were more tolerant of all types of stressors compared to harpacticoids, polychaetes, and oligochaetes, and the lowest taxonomic and morpho-functional diversity of nematodes was observed in the highest sedimentary concentration of S. platensis (50% DW). The mixed treatments may have been richer in micro-habitats and subject to low selective pressure, thereby hosting nematodes with a wide range of adaptations. The responses of the nematode species differed depending on their functional traits. Spirulina enriched with chromium induced two responses for the same feeding group: high toxicity for Daptonema fallax and low toxicity for two Theristus species (T. flevensis and T. modicus). The ecotoxicity of the Spirulina/chromium mixtures were lower than that of Spirulina alone, suggesting mutual neutralization between these two elements. The association between functional traits and taxonomic diversity showed that the effects of the mixtures were not additive and that one of the stressors camouflaged the effect of the other. Our findings should encourage the commercialization of chromium-enriched S. platensis owing to its lower ecotoxicity than Spirulina alone.
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Affiliation(s)
- Naceur Essid
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Rifka Gharbi
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Abdel Halim Harrath
- King Saud University, Zoology Department, College of Science, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Lamjed Mansour
- King Saud University, Zoology Department, College of Science, Box 2455, Riyadh, 11451, Saudi Arabia
| | - Ezzeddine Mahmoudi
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | - Hamouda Beyrem
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia
| | | | - Fehmi Boufahja
- University of Carthage, Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, 7021, Zarzouna, Tunisia.
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Mao G, Zhang Y, Tong Y, Huang X, Mehr F. Ecological risk assessment of heavy metals to aquatic organisms in the Lhasa River, Tibet, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:26091-26102. [PMID: 32358753 DOI: 10.1007/s11356-020-09021-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 04/22/2020] [Indexed: 06/11/2023]
Abstract
The Lhasa River is the largest and most important tributary of the Yarlung Tsangpo River on the Tibetan Plateau, China. It is an important source of drinking water and irrigation for the inhabitants living in the watershed. Despite the increasing focus on water chemistry, the ecological risk assessment (ERA) caused by heavy metals to aquatic organisms in the Lhasa River has not been performed before. Based on the documented monitoring data for heavy metals, the species sensitivity distributions (SSDs) method was applied in this study. The potential ecological risks induced by eight major heavy metals (including arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), manganese (Mn), lead (Pb), and zinc (Zn)) in the Lhasa River to four typical categories of freshwater organisms, including insects, crustaceans, fish, and mollusks, were assessed in different water periods (e.g., high, normal, and low water-periods). Results suggested that the downstream part of the Lhasa River and the Meldromarchu and Tölungchu tributaries are the principal zones for the high aquatic ecological risks. For most of the monitoring sites, the ecological risks decreased in the following order: high-water period > normal-water period > low-water period. During the high-water period, Cu had the highest ecological risks for all selected species. For the insects, the ecological risks were quite low (< 1%) throughout the year. These results suggested that particular attention should be paid to the contamination of certain heavy metals (e.g., Cu and Cr) in the future water management in the Lhasa River.
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Affiliation(s)
- Guozhu Mao
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Yu Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
| | - Yindong Tong
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China.
| | - Xiang Huang
- Department of Chemistry and Environmental Sciences, Tibet University, Lhasa, 850000, Tibet, China
| | - Faryal Mehr
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300350, China
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9
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Ferraz MA, Choueri RB, Castro ÍB, Simon da Silva C, Gallucci F. Influence of sediment organic carbon on toxicity depends on organism's trophic ecology. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 261:114134. [PMID: 32062462 DOI: 10.1016/j.envpol.2020.114134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 01/09/2020] [Accepted: 02/04/2020] [Indexed: 06/10/2023]
Abstract
Studies which showed the influence of organic carbon on the toxicity of sediment-associated contaminants on benthic invertebrates suggest this was primarily due to its influence on the interstitial water concentrations of the contaminant. A higher organic content offers more binding sites for organic contaminants, which means lower toxicity for organisms whose exposure route is mainly through contaminated interstitial water. However, a higher organic content in the sediment could mean a higher toxicity for deposit-feeding organisms, which can assimilate the contaminant by ingestion of contaminated particles. To investigate the influence of sedimentary organic carbon content on the toxicity of an organic contaminant on a benthic community, a microcosm experiment was carried out where natural nematode assemblages were exposed to three concentrations of Irgarol in sediments with two different levels of organic carbon for 7 and 35 days. The response of the nematode assemblage to sediment contamination by Irgarol differed between organically "Lower organic carbon" and "Higher organic carbon" sediments. Responses were genus specific and although community composition was the same in both sediments in the beginning of the assay, contamination by Irgarol affected different genera at each sediment type. Also, the differential amount of organic carbon promoted responses of different functional groups. In Lower organic carbon sediments, contaminated treatments showed lower abundances of the genus Viscosia and the group of predacious nematodes, which were probably affected by an increased availability of Irgarol in the interstitial water in this treatment. In Higher organic carbon sediments, the group of deposit-feeders were mainly affected, suggesting the ingestion of contaminated food as the main route of contamination in this condition. These results indicate that the bioavailability of toxic substances in sediments is not only determined by their partitioning between the different phases of the sediment but also by the organism's trophic ecology.
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Affiliation(s)
- Mariana Aliceda Ferraz
- Centro de Estudos do Mar, Universidade Federal do Paraná, Caixa Postal 61, 83255-976, Pontal do Paraná, PR, Brazil.
| | - Rodrigo Brasil Choueri
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100, Santos, SP, Brazil
| | - Ítalo Braga Castro
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100, Santos, SP, Brazil
| | - Cecília Simon da Silva
- Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100, Santos, SP, Brazil
| | - Fabiane Gallucci
- Centro de Estudos do Mar, Universidade Federal do Paraná, Caixa Postal 61, 83255-976, Pontal do Paraná, PR, Brazil; Instituto do Mar, Universidade Federal de São Paulo (IMAR-UNIFESP), Rua Maria Máximo 168, 11030-100, Santos, SP, Brazil
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Azaroff A, Miossec C, Lanceleur L, Guyoneaud R, Monperrus M. Priority and emerging micropollutants distribution from coastal to continental slope sediments: A case study of Capbreton Submarine Canyon (North Atlantic Ocean). THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 703:135057. [PMID: 31733492 DOI: 10.1016/j.scitotenv.2019.135057] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/11/2019] [Accepted: 10/17/2019] [Indexed: 06/10/2023]
Abstract
Incising continental margins, submarine canyons are key issue for understanding shelf/deep sea exchange of particulate pollutant, impact on marine ecosystem and global geochemical cycling. The occurrence and distribution of 100 priority and emerging micropollutants were investigated in sediments within the first 25 km of the Capbreton submarine area. The most predominant compounds were polycyclic aromatic hydrocarbons (PAHs), trace metals and metalloid (TMs) (e.g. mercury, lead and arsenic), synthetical musks (e.g. musk ketone, galaxolide), UV filters (e.g. octocrylene and 2-ethylhexyl 4-methoxycinnamate, EHMC) as well as some pharmaceuticals (e.g. azithromycin, acetaminophen). Highest concentrations were measured in submarine canyon sediments, distant from the coast and were correlated with both organic carbon and fine fraction contents, where PAHs, EHMC and musk ketone concentrations up to 7116, 32 and 7 ng g-1 dry weight, respectively. Those results likely demonstrate, that atmospheric inputs of pyrogenic PAHs, and both trapping and transporting of polluted particles along the continuum shore/deep sea by the Capbreton Canyon, might lead to an accumulation of anthropogenic micropollutants. The ecological risk assessment indicates that priority pollutants raise a potentially high risk for benthic organisms (e.g. PAHs, TMs). This might raised a specific concern about how the human can impact this ecosystem.
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Affiliation(s)
- Alyssa Azaroff
- CNRS/ UNIV PAU & PAYS ADOUR/ E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux - MIRA, UMR 5254, 64600 Anglet, France
| | - Carole Miossec
- CNRS/ UNIV PAU & PAYS ADOUR/ E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux - MIRA, UMR 5254, 64600 Anglet, France
| | - Laurent Lanceleur
- CNRS/ UNIV PAU & PAYS ADOUR/ E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux - MIRA, UMR 5254, 64600 Anglet, France
| | - Rémy Guyoneaud
- CNRS/ UNIV PAU & PAYS ADOUR/ E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux - MIRA, UMR 5254, 64000 Pau, France
| | - Mathilde Monperrus
- CNRS/ UNIV PAU & PAYS ADOUR/ E2S UPPA, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux - MIRA, UMR 5254, 64600 Anglet, France.
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11
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Omara T, Karungi S, Kalukusu R, Nakabuye B, Kagoya S, Musau B. Mercuric pollution of surface water, superficial sediments, Nile tilapia ( Oreochromis nilotica Linnaeus 1758 [Cichlidae]) and yams ( Dioscorea alata) in auriferous areas of Namukombe stream, Syanyonja, Busia, Uganda. PeerJ 2019; 7:e7919. [PMID: 31656704 PMCID: PMC6812675 DOI: 10.7717/peerj.7919] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 09/18/2019] [Indexed: 01/13/2023] Open
Abstract
The mercury content and the contamination characteristics of water, sediments, edible muscles of a non-piscivorous fish (Oreochromis nilotica Linnaeus 1758 [Cichlidae]) and yams (Dioscorea alata) from Namukombe stream in Busia gold district of Uganda were evaluated. Human health risk assessment from consumption of contaminated fish and yams as well as contact with contaminated sediments from the stream were performed. Forty-eight (48) samples of water (n = 12), sediments (n = 12), fish (n = 12) and yams (n = 12) were taken at intervals of 10 m from three gold recovery sites located at up, middle and down sluices of the stream and analyzed for total mercury (THg) using US EPA method 1631. Results (presented as means ± standard deviations) showed that water in the stream is polluted with mercury in the range of < detection limit to 1.21 ± 0.040 mg/L while sediments contain mean THg from < detection limit to 0.14 ± 0.040 ugg-1. Mean THg content of the edible muscles of O. nilotica ranged from < detection limit to 0.11 ± 0.014 ugg-1while D. alata contained from < detection limit to 0.30 ± 0.173 ugg-1mean THg. The estimated daily intake ranged from 0.0049 ugg-1day-1 to 0.0183 ugg-1day-1 and 0.0200 ugg-1day-1 to 0.0730 ugg-1day-1 for fish consumed by adults and children respectively. The corresponding health risk indices ranged from 0.0123 to 0.0458 and 0.0500 to 0.1830. Estimated daily intake was from 0.0042 ugg-1day-1 to 0.1279 ugg-1day-1 and 0.0130 ugg-1day-1 to 0.3940 ugg-1day-1 for D. alata consumed by adults and children respectively. The health risk indices recorded were from 0.011 to 0.320 and 0.033 to 0.985 for adults and children respectively. The mean THg content of the sediments, edible muscles of O. nilotica and D. alata were within acceptable WHO/US EPA limits. About 91.7% of the water samples had mean THg above US EPA maximum permissible limit for mercury in drinking water. Consumption of D. alata grown within 5 m radius up sluice of Namukombe stream may pose deleterious health risks as reflected by the health risk index of 0.985 being very close to one. From the pollution and risk assessments, mercury use should be delimited in Syanyonja artisanal gold mining areas. A solution to abolish mercury-based gold mining in the area needs to be sought as soon as possible to avert the accentuating health, economic and ecological disaster arising from the continuous discharge of mercury into the surrounding areas. Other mercury-free gold recovering methods such as use of borax, sluice boxes and direct panning should be encouraged. Waste management system for contaminated wastewater, used mercury bottles and tailings should be centralized.
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Affiliation(s)
- Timothy Omara
- Department of Chemistry and Biochemistry, School of Biological and Physical Sciences, Moi University, Uasin Gishu County, Kesses, Eldoret, Kenya.,Department of Chemistry, Faculty of Science, Kyambogo University, Kyambogo, Kampala, Uganda.,Department of Quality Control and Quality Assurance, Product Development Directory, AgroWays Uganda Limited, Kyabazinga way, Jinja, Uganda
| | - Shakilah Karungi
- Department of Mining and Water Resources Engineering, Faculty of Engineering, Busitema University, Busitema, Tororo, Uganda
| | - Raymond Kalukusu
- Department of Chemistry, Faculty of Science, Kyambogo University, Kyambogo, Kampala, Uganda.,Department of Quality Control and Quality Assurance, Leading Distillers Uganda Limited, Kampala, Uganda
| | - BrendaVictoria Nakabuye
- Department of Quality Control and Quality Assurance, Leading Distillers Uganda Limited, Kampala, Uganda.,Department of Food Processing Technology, Faculty of Science, Kyambogo University, Kyambogo, Kampala, Uganda
| | - Sarah Kagoya
- Department of Chemistry, Faculty of Science, Kyambogo University, Kyambogo, Kampala, Uganda.,Department of Quality Control and Quality Assurance, Product Development Directory, Sweets and Confectionaries Section, Kakira Sugar Limited, Jinja, Uganda
| | - Bashir Musau
- Department of Chemistry, Faculty of Science, Kyambogo University, Kyambogo, Kampala, Uganda.,Department of Quality Control and Quality Assurance, Leading Distillers Uganda Limited, Kampala, Uganda
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12
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Martinez JG, Quiobe SP, Moens T. Effects of Mercury (Hg) on Soil Nematodes: A Microcosm Approach. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2019; 77:421-431. [PMID: 31292676 DOI: 10.1007/s00244-019-00652-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 07/01/2019] [Indexed: 06/09/2023]
Abstract
Mercury (Hg), one of the most toxic heavy metals, is commonly used in the gold extraction process in small-scale mining operations in many countries. Our previous field work on the impact of mining on soil nematode assemblages in a small-scale mining area in Sibutad, the Philippines, revealed no significant negative effects despite sometimes strongly elevated Hg concentrations. Using a microcosm approach, we now applied similar Hg concentrations as commonly found in these field sites (2.5, 5, and 10 mg/kg Hg) and determined their impact on nematode assemblages from a different soil with different physicochemical soil attributes. Our results demonstrate (a) limited "bottling" effects (incubation effects) after a 45-day incubation period: a nematode abundance decrease of up to 37%, but absence of significant differences in diversity and nematode assemblage composition; (b) that total nematode abundance already decreased at Hg concentrations (2.5 mg/kg), which did not yield significant impacts on other nematode assemblage descriptors, such as assemblage composition and different diversity indices; and (c) that the Hg concentrations found in the Sibutad field sites can be detrimental to soil nematode assemblages. The discrepancy between our microcosm and the field-based results is probably related to differences in physicochemical soil attributes (e.g., OM contents, soil pH), which suggests that nematode-based environmental assessments should be interpreted in a context-dependent manner.
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Affiliation(s)
- Joey Genevieve Martinez
- Marine Biology Section, Biology Department, Ghent University, Krijgslaan 281/S8, 9000, Ghent, Belgium.
- Department of Biological Sciences, College of Science and Mathematics, Mindanao State University-Iligan Institute of Technology (MSU-IIT), Iligan, Philippines.
- Complex Systems Group, Prime Research Institute of Science and Mathematics (PRISM), MSU-IIT, Iligan, Philippines.
| | - Shiela Pearl Quiobe
- Department of Biological Sciences, College of Science and Mathematics, Mindanao State University-Iligan Institute of Technology (MSU-IIT), Iligan, Philippines
| | - Tom Moens
- Marine Biology Section, Biology Department, Ghent University, Krijgslaan 281/S8, 9000, Ghent, Belgium
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Frontalini F, Semprucci F, Di Bella L, Caruso A, Cosentino C, Maccotta A, Scopelliti G, Sbrocca C, Bucci C, Balsamo M, Martins MV, Armynot du Châtelet E, Coccioni R. The response of cultured meiofaunal and benthic foraminiferal communities to lead exposure: Results from mesocosm experiments. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:2439-2447. [PMID: 29920754 DOI: 10.1002/etc.4207] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 03/27/2018] [Accepted: 06/12/2018] [Indexed: 06/08/2023]
Abstract
Lead (Pb) is regarded as a highly toxic element that poses a serious threat to biota. A mesocosm experiment was performed to assess the influence of Pb on meiofaunal (metazoans within 45-500 μm) and benthic foraminiferal (protozoan) communities. To this end, sediments bearing such communities were incubated in mesocosms, exposed to different levels of Pb in seawater, and monitored for up to 8 wk. Concentrations of Pb <1 ppm in water did not promote a significant increase of this metal in sediments. Relatively high concentrations of Pb seemed to affect meiofaunal and benthic foraminiferal communities by reducing their richness or diversity, and the abundance of the most sensitive taxa. The mesocosm approach can be considered an effective method to document the responses of meiofaunal and benthic foraminiferal communities to various kinds and concentrations of pollutants over time. This approach allows the evaluation of dose-response relationships, validates the outcomes of field studies, and possibly confirms the sediment quality guidelines and thresholds. Environ Toxicol Chem 2018;37:2439-2447. © 2018 SETAC.
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Affiliation(s)
- Fabrizio Frontalini
- Department of Pure and Applied Sciences, University of Urbino, Urbino, Italy
| | - Federica Semprucci
- Department of Biomolecular Sciences, University of Urbino, Urbino, Italy
| | - Letizia Di Bella
- Department of Earth Science, Rome University Sapienza, Roma, Italy
| | - Antonio Caruso
- Dipartimento di Scienze della Terra e del Mare, Università di Palermo, Palermo, Italy
| | - Claudia Cosentino
- Dipartimento di Scienze della Terra e del Mare, Università di Palermo, Palermo, Italy
| | - Antonella Maccotta
- Dipartimento di Scienze della Terra e del Mare, Università di Palermo, Palermo, Italy
| | - Giovanna Scopelliti
- Dipartimento di Scienze della Terra e del Mare, Università di Palermo, Palermo, Italy
| | - Claudia Sbrocca
- Department of Biomolecular Sciences, University of Urbino, Urbino, Italy
| | - Carla Bucci
- Department of Pure and Applied Sciences, University of Urbino, Urbino, Italy
| | - Maria Balsamo
- Department of Biomolecular Sciences, University of Urbino, Urbino, Italy
| | - Maria Virginia Martins
- Laboratory of Micropaleontology, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
- GeoBioTec, Departamento de Geociências, Universidade de Aveiro, Campus de Santiago, Aveiro, Portugal
| | - Eric Armynot du Châtelet
- Laboratoire d'Océanologie et de Géosciences, Université Littoral Côte d'Opale, Université de Lille, Conseil National de la Recherche Scientifique, Lille, France
| | - Rodolfo Coccioni
- Department of Pure and Applied Sciences, University of Urbino, Urbino, Italy
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14
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Loaiza I, Hurtado D, Miglio M, Orrego H, Mendo J. Tissue-specific Cd and Pb accumulation in Peruvian scallop (Argopecten purpuratus) transplanted to a suspended and bottom culture at Sechura Bay, Peru. MARINE POLLUTION BULLETIN 2015; 91:429-440. [PMID: 25444617 DOI: 10.1016/j.marpolbul.2014.09.058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Revised: 09/09/2014] [Accepted: 09/29/2014] [Indexed: 06/04/2023]
Abstract
In order to understand the effect of different culture systems on Cd and Pb accumulation, suspended long-line and bottom cultures of Argopecten purpuratus were conducted during January until April 2010 (120 days). The Cd tissue levels were the highest at the middle of the experiment (30-d till 70-d) for suspended-cultured individuals, while bottom-cultured individuals showed an increasing trend. Gonad Pb levels were also higher during the same period for all cultures, while adductor muscle exhibited no considerable variations. Cd and Pb tissue concentrations were mainly greater in deeper cultures. There were no significant differences in Cd and Pb accumulation between individual sizes. The Cd and Pb levels in edible tissue (gonad+adductor muscle) did not exceed the EU and FDA maximum levels. Based on the target hazard quotient (THQ) and the provisional tolerance weekly intake (PTWI), no risk (THQ<1 and %PTWI<30) was found for human consumption.
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Affiliation(s)
- Iván Loaiza
- Department of Fisheries, Management and Environment, Faculty of Fisheries, La Molina National Agrarian University (UNALM), Haras de la Molina, La Molina, Lima 12, Peru.
| | - Daniela Hurtado
- Department of Fisheries, Management and Environment, Faculty of Fisheries, La Molina National Agrarian University (UNALM), Haras de la Molina, La Molina, Lima 12, Peru
| | - Maria Miglio
- Department of Fisheries, Management and Environment, Faculty of Fisheries, La Molina National Agrarian University (UNALM), Haras de la Molina, La Molina, Lima 12, Peru
| | - Henry Orrego
- Department of Fisheries, Management and Environment, Faculty of Fisheries, La Molina National Agrarian University (UNALM), Haras de la Molina, La Molina, Lima 12, Peru
| | - Jaime Mendo
- Department of Fisheries, Management and Environment, Faculty of Fisheries, La Molina National Agrarian University (UNALM), Haras de la Molina, La Molina, Lima 12, Peru
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15
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Beyrem H, Boufahja F, Hedfi A, Essid N, Aïssa P, Mahmoudi E. Laboratory study on individual and combined effects of cobalt- and zinc-spiked sediment on meiobenthic nematodes. Biol Trace Elem Res 2011; 144:790-803. [PMID: 21455706 DOI: 10.1007/s12011-011-9032-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Accepted: 03/09/2011] [Indexed: 12/01/2022]
Abstract
Free-living nematodes are the most abundant taxa among the meiobenthos and the predominant prey for bottom-feeding fishes. They are able to accumulate toxicants from sediments which explain their use in this study as possible tools in nutritional quality assessment of fishes. Nematodes from sediments of Ghar El Melh lagoon (Tunisia) were subjected to cobalt and/or zinc enrichment in a microcosm experiment for 30 days. Three levels (low, medium, and high) of each treatment were used. Nematode abundance and diversity significantly decreased, and the taxonomic structure was altered. Results from multivariate analyses of the species abundance data revealed that all treatments were significantly different from the control. Both univariate and multivariate analyses of the data showed that the differential response occurred in all treatments, but the assemblages from microcosms contaminated with zinc alone were much more negatively affected compared with those exposed to cobalt alone. The presence of cobalt simultaneously with zinc seems to reduce its impact on nematode species composition. Such a result is suggestive of antagonistic interactions between these two metals. The responses of nematode species to the cobalt and zinc treatments were varied. Oncholaimellus mediterraneus, Oncholaimus campylocercoides, and Neochromadora trichophora were significantly affected with cobalt contamination but, they were not eliminated. Exposed to zinc, Hypodontolaimus colesi was eliminated and seemed to be an intolerant species versus this metal. Some of these species, "cobalt-sensitive" or "zinc-sensitive", were also affected by the metal combination even at low dose: O. mediterraneus, N. trichophora, and H. colesi. Differential sensitivity to cobalt and/or zinc may result in a subsequent competitive release of more tolerant species. A list of this kind of species was established to be used as a possible preventive tool versus contaminated fish. This was most evidently the case in Marylynnia stekhoveni and O. campylocercoides which increased at all doses of cobalt and zinc, respectively. These two resistant species have also the opportunity to dominate the nematode assemblage when the studied metals were added together. The level of health risk is probably higher for humans assimilating additional amount of cobalt and zinc, especially heavy smokers and/or patients using some medications including salts of these metals.
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Affiliation(s)
- Hamouda Beyrem
- Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Faculty of Sciences of Bizerte, University of Carthage, 7021, Zarzouna, Tunisia.
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16
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Callaway A, Quinn R, Brown CJ, Service M, Benetti S. Trace metal contamination of Beaufort's Dyke, North Channel, Irish Sea: a legacy of ordnance disposal. MARINE POLLUTION BULLETIN 2011; 62:2345-2355. [PMID: 21944193 DOI: 10.1016/j.marpolbul.2011.08.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 08/20/2011] [Accepted: 08/25/2011] [Indexed: 05/31/2023]
Abstract
Beaufort's Dyke is a disused ordnance disposal ground within the North Channel of the Irish Sea. Over 1 million tonnes of ordnance were disposed of in the dyke over a 40 year period representing a substantial volume of trace metal pollutants introduced to the seabed. Utilising particle transport modelling software we simulated the potential transport of metal particles from Beaufort's Dyke over a 3 month period. This demonstrated that Beaufort's Dyke has the potential to act as a source for trace metal contamination to areas beyond the submarine valley. Trace metal analysis of sediments from the Dyke and surrounding National Marine Monitoring Programme areas demonstrate that the Dyke is not the most contaminated site in the region. Particle transport modelling enables the transport pathways of trace metal contaminants to be predicted. Implementation of the technique in other munitions disposal grounds will provide valuable information for the selection of monitoring stations.
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Affiliation(s)
- Alexander Callaway
- Centre for Coastal and Marine Research, Environmental Sciences Research Institute and School of Environmental Sciences, University of Ulster, Coleraine, Northern Ireland BT52 1SA, United Kingdom.
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17
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Lira VF, Santos GAP, Derycke S, Larrazabal MEL, Fonsêca-Genevois VG, Moens T. Effects of barium and cadmium on the population development of the marine nematode Rhabditis (Pellioditis) marina. MARINE ENVIRONMENTAL RESEARCH 2011; 72:151-159. [PMID: 21855994 DOI: 10.1016/j.marenvres.2011.07.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2008] [Revised: 07/15/2011] [Accepted: 07/24/2011] [Indexed: 05/31/2023]
Abstract
Offshore oil and gas drilling often involves the use of fluids containing barium and traces of other heavy metals. These may affect the environment, but information on their toxicity to benthic biota remains scant. Here, we present results of a 10-day bioassay with the marine nematode Rhabditis (Pellioditis) marina at different loads of barium (0-10 ,000 ppm nominal concentrations) and cadmium (0-12 ppm) in the range of concentrations reported from drilling-impacted sediments. Barium did not affect the fitness and population development of R. (P.) marina at concentrations up to 300 ppm, but did cause a decrease in population abundance and an increase in development time from concentrations of 400-2000 ppm onwards. Increased mortality occurred at 4800 ppm Ba. For cadmium, LOEC and EC₅₀ values for total population abundance were 2.95 and 8.82 ppm, respectively. Cd concentrations as low as 2.40 to 2.68 caused a decrease in the abundance of adult nematodes, indicating that assays covering more generations would likely demonstrate yet more pronounced population-level effects. Our results indicate that oil and gas drilling activities may potentially have important implications for the meiobenthos through the toxicity of barium and associated metals like cadmium.
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Affiliation(s)
- V F Lira
- Marine Biology Section, Biology Department, Ghent University, Krijgslaan 281 (S8), B-9000 Ghent, Belgium
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18
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Boufahja F, Hedfi A, Amorri J, Aïssa P, Beyrem H, Mahmoudi E. An assessment of the impact of chromium-amended sediment on a marine nematode assemblage using microcosm bioassays. Biol Trace Elem Res 2011; 142:242-55. [PMID: 20632126 DOI: 10.1007/s12011-010-8762-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Accepted: 06/29/2010] [Indexed: 11/25/2022]
Abstract
Microcosms were used to assess the impact of chromium on free-living marine nematodes. Nematodes were exposed to three chromium concentrations (500 ppm (dm, dry mass), 800 ppm (dm) and 1,300 ppm (dm)), and effects were examined after 4 weeks. Results showed significant differences between univariate measures of control nematodes and those from medium- and high-chromium microcosms. Most, decreased significantly with increasing level of chromium contamination. The medium-chromium treatment seems to be the minimal concentration that could has a negative effect on nematodes. Results from multivariate analyses demonstrated that responses of nematode species to chromium treatments were varied: Leptonemella aphanothecae was eliminated at all doses tested and seemed to be intolerant species to chromium; Daptonema normandicum and Sabatieria longisetosa which significantly increased at 500 ppm chromium (dm) appeared to be "opportunistic" species at this dose whereas the two Bathylaimus species (Bathylaimus capacosus and Bathylaimus tenuicaudatus) which increased at all the doses tested seemed to be "chromium resistant". As we think such "opportunistic" and "resistant" species could be used as sensitive indicators of unsafe marine food. The use of microcosms has allowed the effects of the chromium on nematodes to be assessed individually, which was not possible in the field.
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Affiliation(s)
- Fehmi Boufahja
- Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, Faculty of Sciences of Bizerte, 7021 Zarzouna, Tunisia.
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Wang S, Jia Y, Wang S, Wang X, Wang H, Zhao Z, Liu B. Fractionation of heavy metals in shallow marine sediments from Jinzhou Bay, China. J Environ Sci (China) 2010; 22:23-31. [PMID: 20397383 DOI: 10.1016/s1001-0742(09)60070-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This work investigated the distribution and speciation of Cd, Cu, Pb, Fe and Mn in the shallow sediments of Jinzhou Bay, Northeast China, which has been heavily contaminated by nonferrous smelting activities. The concentrations of Cd, Cu and Pb in sediments were found to be 100, 13 and 7 times, respectively, being higher than the national guideline (GB 18668-2002). Sequential extraction test showed that 39%-61% of Cd were exchangeable fractions, indicating that Cd in the sediments posed a high risk to local environments. While Cu and Pb were at moderate risk levels: According to the relationships between percentage of metal speciation and total metal concentration, it was concluded that the distributions of Cd, Cu and Pb in some geochemical fractions were dynamic in the process of pollutants migration and the stability of metals in sediments of Jinzhou Bay decreased in the order of Pb > Cu > Cd.
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Affiliation(s)
- Shaofeng Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
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20
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Moreno M, Albertelli G, Fabiano M. Nematode response to metal, PAHs and organic enrichment in tourist marinas of the Mediterranean Sea. MARINE POLLUTION BULLETIN 2009; 58:1192-1201. [PMID: 19386320 DOI: 10.1016/j.marpolbul.2009.03.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2008] [Revised: 03/05/2009] [Accepted: 03/16/2009] [Indexed: 05/27/2023]
Abstract
The structure of nematode assemblages was investigated in the sediments of two different tourist marinas in the Mediterranean Sea and related to pollution variables. Nematode densities and generic compositions were determined, as were concentrations of heavy metals, PAHs and organic matter. Results showed different assemblages at the two marinas, with a dominance of the genera Paralongicyatholaimus and Daptonema. Significant correlations between nematodes and concentrations of environmental contaminants were found. In particular, Paralongicyatholaimus showed a significant negative correlation with Cu concentrations and was almost absent at the stations where higher Cu concentrations were found. The presence of sensitive/tolerant nematode genera represents a promising tool to identify areas subjected to a higher level of disturbance and to define the correct environmental management strategy for harbors.
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Affiliation(s)
- M Moreno
- Department for the Study of the Territory and its Resources, University of Genoa, C.so Europa 26, 16132, Genoa, Italy.
| | - G Albertelli
- Department for the Study of the Territory and its Resources, University of Genoa, C.so Europa 26, 16132, Genoa, Italy
| | - M Fabiano
- Department for the Study of the Territory and its Resources, University of Genoa, C.so Europa 26, 16132, Genoa, Italy
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21
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Hermi M, Mahmoudi E, Beyrem H, Aïssa P, Essid N. Responses of a free-living marine nematode community to mercury contamination: results from microcosm experiments. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2009; 56:426-433. [PMID: 18726536 DOI: 10.1007/s00244-008-9217-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2008] [Accepted: 08/04/2008] [Indexed: 05/26/2023]
Abstract
A microcosm experiment was used to examine the effects of mercury contamination on a free-living nematode community in a Tunisian lagoon. Sediments were contaminated with three mercury concentrations (low, 0.084 ppm; medium, 0.167 ppm; and high, 0.334 ppm), and effects were examined after 60 days. Results from multiple-comparison tests showed significant differences between nematode assemblages from undisturbed control and those from mercury treatments. Most univariate measures decreased significantly with increasing level of Hg contamination. Results from multivariate analyses of the species abundance data demonstrated that responses of nematode species to mercury contamination were varied: Araeolaimus bioculatus was eliminated at all the mercury doses tested and seemed to be an intolerant species to mercury contamination; Marylynnia stekhoveni increased at low and medium concentrations and appeared to be an "opportunistic" species at these doses, whereas Prochromadorella neapolitana, which increased at all doses tested (0.084, 0.167, and 0.334 ppm), seemed to be a "mercury-resistant" species.
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Affiliation(s)
- M Hermi
- Laboratoire de Biosurveillance de l'Environnement, Faculté des Sciences de Bizerte, Zarzouna, Tunisie
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