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Wang X, Li H, Zhang R, Liu X, Nan F, Liu Q, Lv J, Feng J, Xie S, Liu Y. Bacterial community and dissolved organic matter networks in urban river: The role of human influence. ENVIRONMENTAL RESEARCH 2024; 263:120021. [PMID: 39293755 DOI: 10.1016/j.envres.2024.120021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2024] [Revised: 09/12/2024] [Accepted: 09/15/2024] [Indexed: 09/20/2024]
Abstract
Human activities have significantly altered the biogeochemical cycles of carbon, nitrogen, and sulfur in aquatic ecosystems, leading to ecological problems.This study utilized 16S rRNA gene high-throughput sequencing and excitation-emission matrix parallel factor analysis (EEM-PARAFAC) to evaluate the bacterial community composition and dissolved organic matter structure in the upstream (less impacted) and downstream (severely impacted) sections of the river, with a focus on the interactions between bacterial diversity and dissolved organic matter (DOM) characteristics.Results indicated significant spatial diversity in bacterial communities, with a higher α-diversity upstream compared to the more polluted downstream sections. Environmental parameters, particularly total phosphorus (TP) and dissolved oxygen (DO), were found to significantly influence the distribution and composition of bacterial phyla through redundancy analysis. The pattern of bacterial community assembly has shifted from predominantly deterministic to predominantly stochastic as a result of human activities. The analysis of DOM through EEM-PARAFAC identified three main fluorescent components, reflecting varied sources and interactions with bacterial communities. Upstream, microbial activities predominantly contributed to autochthonous DOM, while downstream, increased inputs of allochthonous DOM from human activities were evident. Furthermore, the study revealed that through the introduction of various organic pollutants and nutrient loads that shift microbial metabolic functions towards increased degradation and transformation of complex organic compounds downstream. Structural equation modeling (SEM) revealed that upstream human activities primarily affected bacterial communities indirectly by altering DOM properties. In contrast, downstream activities had both direct and indirect effects due to higher pollutant loads and more complex environmental conditions. These interactions underline the profound effect of anthropogenic factors on riverine ecosystems and emphasize the importance of managing human impacts to preserve microbial biodiversity and water quality.
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Affiliation(s)
- Xiding Wang
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Huimin Li
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Ruikai Zhang
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Xudong Liu
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Fangru Nan
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Qi Liu
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Junping Lv
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Jia Feng
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Shulian Xie
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China.
| | - Yang Liu
- Shanxi Key Laboratory for Research and Development of Regional Plants, School of Life Science, Shanxi University, Taiyuan, 030006, China.
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2
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Voolstra CR, Raina JB, Dörr M, Cárdenas A, Pogoreutz C, Silveira CB, Mohamed AR, Bourne DG, Luo H, Amin SA, Peixoto RS. The coral microbiome in sickness, in health and in a changing world. Nat Rev Microbiol 2024; 22:460-475. [PMID: 38438489 DOI: 10.1038/s41579-024-01015-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2024] [Indexed: 03/06/2024]
Abstract
Stony corals, the engines and engineers of reef ecosystems, face unprecedented threats from anthropogenic environmental change. Corals are holobionts that comprise the cnidarian animal host and a diverse community of bacteria, archaea, viruses and eukaryotic microorganisms. Recent research shows that the bacterial microbiome has a pivotal role in coral biology. A healthy bacterial assemblage contributes to nutrient cycling and stress resilience, but pollution, overfishing and climate change can break down these symbiotic relationships, which results in disease, bleaching and, ultimately, coral death. Although progress has been made in characterizing the spatial-temporal diversity of bacteria, we are only beginning to appreciate their functional contribution. In this Review, we summarize the ecological and metabolic interactions between bacteria and other holobiont members, highlight the biotic and abiotic factors influencing the structure of bacterial communities and discuss the impact of climate change on these communities and their coral hosts. We emphasize how microbiome-based interventions can help to decipher key mechanisms underpinning coral health and promote reef resilience. Finally, we explore how recent technological developments may be harnessed to address some of the most pressing challenges in coral microbiology, providing a road map for future research in this field.
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Affiliation(s)
| | - Jean-Baptiste Raina
- Climate Change Cluster, University of Technology Sydney, Ultimo, New South Wales, Australia.
| | - Melanie Dörr
- Department of Biology, University of Konstanz, Konstanz, Germany
| | - Anny Cárdenas
- Department of Biology, American University, Washington, DC, USA
| | - Claudia Pogoreutz
- PSL Université Paris: EPHE-UPVD-CNRS, UAR 3278 CRIOBE, Université de Perpignan, Perpignan, France
| | | | - Amin R Mohamed
- Marine Microbiomics Laboratory, Biology Program, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - David G Bourne
- Australian Institute of Marine Science, Townsville, Queensland, Australia
- College of Science and Engineering, James Cook University, Townsville, Queensland, Australia
| | - Haiwei Luo
- Simon F.S. Li Marine Science Laboratory, School of Life Sciences, State Key Laboratory of Agrobiotechnology and Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Shady A Amin
- Marine Microbiomics Laboratory, Biology Program, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
- Center for Genomics and Systems Biology (CGSB), New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
| | - Raquel S Peixoto
- Red Sea Research Center (RSRC) and Computational Biology Research Center (CBRC), Biological, Environmental Sciences, and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia.
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3
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Carilli J, Baer J, Aquino JM, Little M, Chadwick B, Rohwer F, Rosen G, van der Geer A, Sánchez-Quinto A, Ballard A, Hartmann AC. Escaping the benthos with Coral Reef Arks: effects on coral translocation and fish biomass. PeerJ 2024; 12:e17640. [PMID: 39071125 PMCID: PMC11283776 DOI: 10.7717/peerj.17640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 06/06/2024] [Indexed: 07/30/2024] Open
Abstract
Anthropogenic stressors like overfishing, land based runoff, and increasing temperatures cause the degradation of coral reefs, leading to the loss of corals and other calcifiers, increases in competitive fleshy algae, and increases in microbial pathogen abundance and hypoxia. To test the hypothesis that corals would be healthier by moving them off the benthos, a common garden experiment was conducted in which corals were translocated to midwater geodesic spheres (hereafter called Coral Reef Arks or Arks). Coral fragments translocated to the Arks survived significantly longer than equivalent coral fragments translocated to Control sites (i.e., benthos at the same depth). Over time, average living coral surface area and volume were higher on the Arks than the Control sites. The abundance and biomass of fish were also generally higher on the Arks compared to the Control sites, with more piscivorous fish on the Arks. The addition of Autonomous Reef Monitoring Structures (ARMS), which served as habitat for sessile and motile reef-associated organisms, also generally significantly increased fish associated with the Arks. Overall, the Arks increased translocated coral survivorship and growth, and exhibited knock-on effects such as higher fish abundance.
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Affiliation(s)
- Jessica Carilli
- Naval Information Warfare Center Pacific, San Diego, CA, United States
| | - Jason Baer
- San Diego State University, San Diego, CA, United States
| | | | - Mark Little
- Harvard University, Cambridge, MA, United States
| | - Bart Chadwick
- Coastal Monitoring Associates, San Diego, CA, United States
| | - Forest Rohwer
- San Diego State University, San Diego, CA, United States
| | - Gunther Rosen
- Naval Information Warfare Center Pacific, San Diego, CA, United States
| | | | | | - Ashton Ballard
- San Diego State University, San Diego, CA, United States
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4
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Garcia B, Becker CC, Weber L, Swarr GJ, Kido Soule MC, Apprill A, Kujawinski EB. Benzoyl Chloride Derivatization Advances the Quantification of Dissolved Polar Metabolites on Coral Reefs. J Proteome Res 2024; 23:2041-2053. [PMID: 38782401 PMCID: PMC11166142 DOI: 10.1021/acs.jproteome.4c00049] [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: 01/22/2024] [Revised: 04/23/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
Extracellular chemical cues constitute much of the language of life among marine organisms, from microbes to mammals. Changes in this chemical pool serve as invisible signals of overall ecosystem health and disruption to this finely tuned equilibrium. In coral reefs, the scope and magnitude of the chemicals involved in maintaining reef equilibria are largely unknown. Processes involving small, polar molecules, which form the majority components of labile dissolved organic carbon, are often poorly captured using traditional techniques. We employed chemical derivatization with mass spectrometry-based targeted exometabolomics to quantify polar dissolved phase metabolites on five coral reefs in the U.S. Virgin Islands. We quantified 45 polar exometabolites, demonstrated their spatial variability, and contextualized these findings in terms of geographic and benthic cover differences. By comparing our results to previously published coral reef exometabolomes, we show the novel quantification of 23 metabolites, including central carbon metabolism compounds (e.g., glutamate) and novel metabolites such as homoserine betaine. We highlight the immense potential of chemical derivatization-based exometabolomics for quantifying labile chemical cues on coral reefs and measuring molecular level responses to environmental stressors. Overall, improving our understanding of the composition and dynamics of reef exometabolites is vital for effective ecosystem monitoring and management strategies.
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Affiliation(s)
- Brianna
M. Garcia
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | | | - Laura Weber
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | - Gretchen J. Swarr
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | - Melissa C. Kido Soule
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | - Amy Apprill
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
| | - Elizabeth B. Kujawinski
- Department of Marine Chemistry
and Geochemistry, Woods Hole Oceanographic
Institution, Woods
Hole, Massachusetts 02543, United States
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5
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Li Y, Zhang R, Ma G, Shi M, Xi Y, Li X, Wang S, Zeng X, Jia Y. Bacterial community in the metal(loid)-contaminated marine vertical sediments of Jinzhou Bay: Impacts and adaptations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171180. [PMID: 38402990 DOI: 10.1016/j.scitotenv.2024.171180] [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: 01/06/2024] [Revised: 02/19/2024] [Accepted: 02/20/2024] [Indexed: 02/27/2024]
Abstract
Metal(loid) discharge has led to severe coastal contamination; however, there remains a significant knowledge gap regarding its impact on sediment profiles and depth-resolved bacterial communities. In this study, geochemical measurements (pH, nutrient elements, total and bioavailable metal(loid) content) consistently revealed decreasing nitrogen, phosphorus, and metal(loid) levels with sediment depth, accompanied by reduced alpha diversity. Principal coordinate analysis indicated distinct community compositions with varying sediment depths, suggesting a geochemical influence on diversity. Ecological niche width expanded with depth, favoring specialists over generalists, but both groups decreased in abundance. Taxonomic shifts emerged, particularly in phyla and families, correlated with sediment depth. Microbe-microbe interactions displayed intricate dynamics, with keystone taxa varying by sediment layer. Zinc and arsenic emerged as key factors impacting community diversity and composition using random forest, network analysis, and Mantel tests. Functional predictions revealed shifts in potential phenotypes related to mobile elements, biofilm formation, pathogenicity, N/P/S cycles, and metal(loid) resistance along sediment profiles. Neutral and null models demonstrated a transition from deterministic to stochastic processes with sediment layers. This study provides insights into the interplay between sediment geochemistry and bacterial communities across sediment depths, illuminating the factors shaping these ecosystems.
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Affiliation(s)
- Yongbin Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Rui Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Guoqing Ma
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Mingyi Shi
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yimei Xi
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
| | - Xiaojun Li
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
| | - Shaofeng Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Xiangfeng Zeng
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China.
| | - Yongfeng Jia
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
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6
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Aji LP, Maas DL, Capriati A, Ahmad A, de Leeuw C, Becking LE. Shifts in dominance of benthic communities along a gradient of water temperature and turbidity in tropical coastal ecosystems. PeerJ 2024; 12:e17132. [PMID: 38666078 PMCID: PMC11044884 DOI: 10.7717/peerj.17132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/27/2024] [Indexed: 04/28/2024] Open
Abstract
Tropical coastal benthic communities will change in species composition and relative dominance due to global (e.g., increasing water temperature) and local (e.g., increasing terrestrial influence due to land-based activity) stressors. This study aimed to gain insight into possible trajectories of coastal benthic assemblages in Raja Ampat, Indonesia, by studying coral reefs at varying distances from human activities and marine lakes with high turbidity in three temperature categories (<31 °C, 31-32 °C, and >32 °C). The benthic community diversity and relative coverage of major benthic groups were quantified via replicate photo transects. The composition of benthic assemblages varied significantly among the reef and marine lake habitats. The marine lakes <31 °C contained hard coral, crustose coralline algae (CCA), and turf algae with coverages similar to those found in the coral reefs (17.4-18.8% hard coral, 3.5-26.3% CCA, and 15-15.5% turf algae, respectively), while the higher temperature marine lakes (31-32 °C and >32 °C) did not harbor hard coral or CCA. Benthic composition in the reefs was significantly influenced by geographic distance among sites but not by human activity or depth. Benthic composition in the marine lakes appeared to be structured by temperature, salinity, and degree of connection to the adjacent sea. Our results suggest that beyond a certain temperature (>31 °C), benthic communities shift away from coral dominance, but new outcomes of assemblages can be highly distinct, with a possible varied dominance of macroalgae, benthic cyanobacterial mats, or filter feeders such as bivalves and tubeworms. This study illustrates the possible use of marine lake model systems to gain insight into shifts in the benthic community structure of tropical coastal ecosystems if hard corals are no longer dominant.
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Affiliation(s)
- Ludi Parwadani Aji
- Wageningen University and Research, Wageningen, The Netherlands
- Naturalis Biodiversity Center, Leiden, The Netherlands
- Research Center for Oceanography, National Research and Innovation Agency, Jakarta, Indonesia
| | | | | | | | | | - Leontine Elisabeth Becking
- Wageningen University and Research, Wageningen, The Netherlands
- Naturalis Biodiversity Center, Leiden, The Netherlands
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7
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Becker CC, Weber L, Llopiz JK, Mooney TA, Apprill A. Microorganisms uniquely capture and predict stony coral tissue loss disease and hurricane disturbance impacts on US Virgin Island reefs. Environ Microbiol 2024; 26:e16610. [PMID: 38576217 DOI: 10.1111/1462-2920.16610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 03/01/2024] [Indexed: 04/06/2024]
Abstract
Coral reef ecosystems are now commonly affected by major climate and disease disturbances. Disturbance impacts are typically recorded using reef benthic cover, but this may be less reflective of other ecosystem processes. To explore the potential for reef water-based disturbance indicators, we conducted a 7-year time series on US Virgin Island reefs where we examined benthic cover and reef water nutrients and microorganisms from 2016 to 2022, which included two major disturbances: hurricanes Irma and Maria in 2017 and the stony coral tissue loss disease outbreak starting in 2020. The disease outbreak coincided with the largest changes in the benthic habitat, with increases in the percent cover of turf algae and Ramicrusta, an invasive alga. While sampling timepoint contributed most to changes in reef water nutrient composition and microbial community beta diversity, both disturbances led to increases in ammonium concentration, a mechanism likely contributing to observed microbial community shifts. We identified 10 microbial taxa that were sensitive and predictive of increasing ammonium concentration. This included the decline of the oligotrophic and photoautotrophic Prochlorococcus and the enrichment of heterotrophic taxa. As disturbances impact reefs, the changing nutrient and microbial regimes may foster a type of microbialization, a process that hastens reef degradation.
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Affiliation(s)
- Cynthia C Becker
- MIT-WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Cambridge and Woods Hole, Massachusetts, USA
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
| | - Laura Weber
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
| | - Joel K Llopiz
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
| | - T Aran Mooney
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
| | - Amy Apprill
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
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8
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Lai JL, Li ZG, Han MW, Huang Y, Xi HL, Luo XG. Analysis of environmental biological effects and OBT accumulation potential of microalgae in freshwater systems exposed to tritium pollution. WATER RESEARCH 2024; 250:121013. [PMID: 38118252 DOI: 10.1016/j.watres.2023.121013] [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: 06/01/2023] [Revised: 12/07/2023] [Accepted: 12/10/2023] [Indexed: 12/22/2023]
Abstract
The ecological risk of tritiated wastewater into the environment has attracted much attention. Assessing the ecological risk of tritium-containing pollution is crucial by studying low-activity tritium exposure's environmental and biological effects on freshwater micro-environment and the enrichment potential of organically bound tritium (OBT) in microalgae and aquatic plants. The impact of tritium-contaminated wastewater on the microenvironment of freshwater systems was analyzed using microcosm experiments to simulate tritium pollution in freshwater systems. Low activity tritium pollution (105 Bq/L) induced differences in microbial abundance, with Proteobacteria, Bacteroidota, and Desulfobacterota occupying important ecological niches in the water system. Low activity tritium (105-107 Bq/L) did not affect the growth of microalgae and aquatic plants, but OBT was significantly enriched in microalgae and two aquatic plants (Pistia stratiotes, Spirodela polyrrhiza), with the enrichment coefficients of 2.08-3.39 and 1.71-2.13, respectively. At the transcriptional level, low-activity tritium (105 Bq/L) has the risk of interfering with gene expression in aquatic plants. Four dominant cyanobacterial strains (Leptolyngbya sp., Synechococcus elongatus, Nostoc sp., and Anabaena sp.) were isolated and demonstrated good environmental adaptability to tritium pollution. Environmental factors can modify the tritium accumulation potential in cyanobacteria and microalgae, theoretically enhancing food chain transfer.
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Affiliation(s)
- Jin-Long Lai
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China; State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Zhan-Guo Li
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Meng-Wei Han
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Yan Huang
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Hai-Ling Xi
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China.
| | - Xue-Gang Luo
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China.
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9
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Vizon C, Urbanowiez A, Raviglione D, Bonnard I, Nugues MM. Benthic cyanobacterial metabolites interact to reduce coral larval survival and settlement. HARMFUL ALGAE 2024; 132:102582. [PMID: 38331546 DOI: 10.1016/j.hal.2024.102582] [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: 09/14/2023] [Revised: 01/04/2024] [Accepted: 01/15/2024] [Indexed: 02/10/2024]
Abstract
Benthic cyanobacterial mats (BCMs) are becoming increasingly abundant on coral reefs worldwide. High growth rates and prolific toxin production give them the potential to cause widespread coral recruitment failure through allelopathic effects, but few studies have made the link between their toxicity for coral larvae and in situ toxin concentrations. Here we investigated the allelopathic effects of the benthic cyanobacterium Anabaena sp.1 on larvae of the coral Pocillopora acuta. This cyanobacterium produces several non-ribosomal cyclic lipopeptides of the laxaphycin family with cytotoxic properties. Therefore, we measured the concentration of laxaphycins A and B in Anabaena mats and in the water column and tested their effects on coral larvae. We found that Anabaena crude extract reduces both larval survivorship and settlement and that laxaphycin B reduces settlement. When larvae were exposed to both laxaphycins, there was a reduction in both larval survival and settlement. In the natural reef environment, laxaphycin A and B concentrations increased with increasing proximity to Anabaena mats, with concentrations being consistently above LC50 and EC50 thresholds within a 1 cm distance of the mats. This study demonstrates that laxaphycins reduce the survival and inhibit the settlement of coral larvae at concentrations found near Anabaena mats in situ. It further shows a combined effect between two cyanobacterial metabolites. As BCMs become more common, more of their secondary metabolites might be released in the water column. Their occurrence will lead to a reduction in coral recruitment rates, contributing to the continuing decline of coral reefs and shift in community structure.
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Affiliation(s)
- Camille Vizon
- PSL Université Paris: EPHE-UPVD-CNRS, UAR 3278 CRIOBE, Université de Perpignan, 52 avenue Paul Alduy, 66860 Perpignan, France.
| | - Axel Urbanowiez
- PSL Université Paris: EPHE-UPVD-CNRS, UAR 3278 CRIOBE, Université de Perpignan, 52 avenue Paul Alduy, 66860 Perpignan, France
| | - Delphine Raviglione
- PSL Université Paris: EPHE-UPVD-CNRS, UAR 3278 CRIOBE, Université de Perpignan, 52 avenue Paul Alduy, 66860 Perpignan, France; Plateau technique MSXM, Plateforme Bio2mar, Université de Perpignan via Domitia, Perpignan, Cedex 9, France
| | - Isabelle Bonnard
- PSL Université Paris: EPHE-UPVD-CNRS, UAR 3278 CRIOBE, Université de Perpignan, 52 avenue Paul Alduy, 66860 Perpignan, France; Plateau technique MSXM, Plateforme Bio2mar, Université de Perpignan via Domitia, Perpignan, Cedex 9, France; Laboratoire d'Excellence Corail, 66860 Perpignan, France
| | - Maggy M Nugues
- PSL Université Paris: EPHE-UPVD-CNRS, UAR 3278 CRIOBE, Université de Perpignan, 52 avenue Paul Alduy, 66860 Perpignan, France; Laboratoire d'Excellence Corail, 66860 Perpignan, France
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10
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Terzin M, Laffy PW, Robbins S, Yeoh YK, Frade PR, Glasl B, Webster NS, Bourne DG. The road forward to incorporate seawater microbes in predictive reef monitoring. ENVIRONMENTAL MICROBIOME 2024; 19:5. [PMID: 38225668 PMCID: PMC10790441 DOI: 10.1186/s40793-023-00543-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 12/11/2023] [Indexed: 01/17/2024]
Abstract
Marine bacterioplankton underpin the health and function of coral reefs and respond in a rapid and sensitive manner to environmental changes that affect reef ecosystem stability. Numerous meta-omics surveys over recent years have documented persistent associations of opportunistic seawater microbial taxa, and their associated functions, with metrics of environmental stress and poor reef health (e.g. elevated temperature, nutrient loads and macroalgae cover). Through positive feedback mechanisms, disturbance-triggered heterotrophic activity of seawater microbes is hypothesised to drive keystone benthic organisms towards the limit of their resilience and translate into shifts in biogeochemical cycles which influence marine food webs, ultimately affecting entire reef ecosystems. However, despite nearly two decades of work in this space, a major limitation to using seawater microbes in reef monitoring is a lack of a unified and focused approach that would move beyond the indicator discovery phase and towards the development of rapid microbial indicator assays for (near) real-time reef management and decision-making. By reviewing the current state of knowledge, we provide a comprehensive framework (defined as five phases of research and innovation) to catalyse a shift from fundamental to applied research, allowing us to move from descriptive to predictive reef monitoring, and from reactive to proactive reef management.
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Affiliation(s)
- Marko Terzin
- Australian Institute of Marine Science, PMB no3 Townsville MC, Townsville, QLD, 4810, Australia.
- College of Science and Engineering, James Cook University, Townsville, QLD, 4811, Australia.
- AIMS@JCU, James Cook University, Townsville, QLD, 4811, Australia.
| | - Patrick W Laffy
- Australian Institute of Marine Science, PMB no3 Townsville MC, Townsville, QLD, 4810, Australia
- AIMS@JCU, James Cook University, Townsville, QLD, 4811, Australia
| | - Steven Robbins
- Australian Centre for Ecogenomics, University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Yun Kit Yeoh
- Australian Institute of Marine Science, PMB no3 Townsville MC, Townsville, QLD, 4810, Australia
- AIMS@JCU, James Cook University, Townsville, QLD, 4811, Australia
| | - Pedro R Frade
- Natural History Museum Vienna, 1010, Vienna, Austria
| | - Bettina Glasl
- Division of Microbial Ecology, Centre for Microbiology and Environmental Systems Science, University of Vienna, 1030, Vienna, Austria
| | - Nicole S Webster
- Australian Institute of Marine Science, PMB no3 Townsville MC, Townsville, QLD, 4810, Australia
- Australian Centre for Ecogenomics, University of Queensland, St. Lucia, QLD, 4072, Australia
- Australian Antarctic Program, Department of Climate Change, Energy, the Environment and Water, Kingston, TAS, 7050, Australia
| | - David G Bourne
- Australian Institute of Marine Science, PMB no3 Townsville MC, Townsville, QLD, 4810, Australia.
- College of Science and Engineering, James Cook University, Townsville, QLD, 4811, Australia.
- AIMS@JCU, James Cook University, Townsville, QLD, 4811, Australia.
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11
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Barrows AR, Hancock JR, Cohen DL, Gorong P, Lewis M, Louie S, Musselman L, Caruso C, Miller S, Drury C. Enhancing survivorship and growth of juvenile Montipora capitata using the Hawaiian collector urchin Tripneustes gratilla. PeerJ 2023; 11:e16113. [PMID: 37790625 PMCID: PMC10542273 DOI: 10.7717/peerj.16113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/27/2023] [Indexed: 10/05/2023] Open
Abstract
The biodiversity of coral reef habitats is rapidly declining due to the effects of anthropogenic climate change, prompting the use of active restoration as a mitigation strategy. Sexual propagation can maintain or enhance genetic diversity in restoration of these ecosystems, but these approaches suffer from a range of inefficiencies in rearing and husbandry. Algal overgrowth of juveniles is a major bottleneck in the production of sexually propagated corals that may be alleviated by co-culture with herbivores. We reared juvenile Montipora capitata alongside juvenile native Hawaiian collector urchins, Tripneustes gratilla, for 15 weeks and documented significant ecological benefits of co-culture. Urchin treatments significantly increased the survivorship of coral aggregates (14%) and individual settlers (24%). We also documented a significant increase in coral growth in the presence of urchins. These results demonstrate the utility of microherbivory in promoting coral growth and survivorship in ex situ conditions, providing valuable insight for restoration pipelines of native Hawaiian coral species.
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Affiliation(s)
- Andrew R. Barrows
- Hawai‘i Institute of Marine Biology, University of Hawai‘i, Kāne‘ohe, HI, United States
| | - Joshua R. Hancock
- Hawai‘i Institute of Marine Biology, University of Hawai‘i, Kāne‘ohe, HI, United States
| | - David L. Cohen
- Department of Land and Natural Resources, Division of Aquatic Resources, Honolulu, Hawai‘i, United States
| | - Patrick Gorong
- Department of Land and Natural Resources, Division of Aquatic Resources, Honolulu, Hawai‘i, United States
| | - Matthew Lewis
- Department of Land and Natural Resources, Division of Aquatic Resources, Honolulu, Hawai‘i, United States
| | - Sean Louie
- Department of Land and Natural Resources, Division of Aquatic Resources, Honolulu, Hawai‘i, United States
| | - Lani Musselman
- Department of Land and Natural Resources, Division of Aquatic Resources, Honolulu, Hawai‘i, United States
| | - Carlo Caruso
- Hawai‘i Institute of Marine Biology, University of Hawai‘i, Kāne‘ohe, HI, United States
| | - Spencer Miller
- Hawai‘i Institute of Marine Biology, University of Hawai‘i, Kāne‘ohe, HI, United States
| | - Crawford Drury
- Hawai‘i Institute of Marine Biology, University of Hawai‘i, Kāne‘ohe, HI, United States
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12
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Mannochio-Russo H, Swift SOI, Nakayama KK, Wall CB, Gentry EC, Panitchpakdi M, Caraballo-Rodriguez AM, Aron AT, Petras D, Dorrestein K, Dorrestein TK, Williams TM, Nalley EM, Altman-Kurosaki NT, Martinelli M, Kuwabara JY, Darcy JL, Bolzani VS, Wegley Kelly L, Mora C, Yew JY, Amend AS, McFall-Ngai M, Hynson NA, Dorrestein PC, Nelson CE. Microbiomes and metabolomes of dominant coral reef primary producers illustrate a potential role for immunolipids in marine symbioses. Commun Biol 2023; 6:896. [PMID: 37653089 PMCID: PMC10471604 DOI: 10.1038/s42003-023-05230-1] [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: 12/01/2022] [Accepted: 08/08/2023] [Indexed: 09/02/2023] Open
Abstract
The dominant benthic primary producers in coral reef ecosystems are complex holobionts with diverse microbiomes and metabolomes. In this study, we characterize the tissue metabolomes and microbiomes of corals, macroalgae, and crustose coralline algae via an intensive, replicated synoptic survey of a single coral reef system (Waimea Bay, O'ahu, Hawaii) and use these results to define associations between microbial taxa and metabolites specific to different hosts. Our results quantify and constrain the degree of host specificity of tissue metabolomes and microbiomes at both phylum and genus level. Both microbiome and metabolomes were distinct between calcifiers (corals and CCA) and erect macroalgae. Moreover, our multi-omics investigations highlight common lipid-based immune response pathways across host organisms. In addition, we observed strong covariation among several specific microbial taxa and metabolite classes, suggesting new metabolic roles of symbiosis to further explore.
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Affiliation(s)
- Helena Mannochio-Russo
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA.
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University, Araraquara, SP, 14800-060, Brazil.
| | - Sean O I Swift
- Daniel K. Inouye Center for Microbial Oceanography: Research and Education, Department of Oceanography and Sea Grant College Program, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA.
| | - Kirsten K Nakayama
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Christopher B Wall
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
- Ecology Behavior and Evolution Section, Department of Biological Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Emily C Gentry
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Morgan Panitchpakdi
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Andrés M Caraballo-Rodriguez
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Allegra T Aron
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO, 80210, USA
| | - Daniel Petras
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
- Cluster of Excellence "Controlling Microbes to Fight Infections" (CMFI), University of Tuebingen, Tuebingen, Germany
| | - Kathleen Dorrestein
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
| | | | - Taylor M Williams
- Marine Option Program, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Eileen M Nalley
- Hawai'i Sea Grant College Program, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Noam T Altman-Kurosaki
- School of Biological Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA, 30332, USA
| | | | - Jeff Y Kuwabara
- Marine Option Program, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - John L Darcy
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Vanderlan S Bolzani
- Department of Biochemistry and Organic Chemistry, Institute of Chemistry, São Paulo State University, Araraquara, SP, 14800-060, Brazil
| | - Linda Wegley Kelly
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, California, CA, USA
| | - Camilo Mora
- Geography, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Joanne Y Yew
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Anthony S Amend
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Margaret McFall-Ngai
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Nicole A Hynson
- Pacific Biosciences Research Center, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
| | - Pieter C Dorrestein
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
- Collaborative Mass Spectrometry Innovation Center, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Craig E Nelson
- Daniel K. Inouye Center for Microbial Oceanography: Research and Education, Department of Oceanography and Sea Grant College Program, University of Hawai'i at Mānoa, Honolulu, HI, 96822, USA
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