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Liu X, Pan B, Liu X, Han X, Zhu P, Li G, Li D. Trophic level plays an enhanced role in shaping microbiota structure and assembly in lakes with decreased salinity on the Qinghai-Tibet and Inner Mongolia Plateaus. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171316. [PMID: 38423321 DOI: 10.1016/j.scitotenv.2024.171316] [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: 11/15/2023] [Revised: 02/25/2024] [Accepted: 02/25/2024] [Indexed: 03/02/2024]
Abstract
Plateau lakes characterized by salinization and eutrophication are essential aquatic ecosystems. A myriad of microorganisms serve as crucial biological resources in plateau lakes and drive the elemental cycles of these ecosystems. Currently, there is a paucity of knowledge regarding the impacts of salinization and eutrophication dynamics on the microbiota in plateau lakes. Here, high-throughput sequencing of the 16S ribosomal RNA genes (V4 region) was used to characterize microbial community structure and assembly in plateau lakes with different salinities and trophic levels. Water samples were collected at 191 sites across 24 lakes on the Qinghai-Tibet and Inner Mongolia Plateaus in northern China. The results showed that high salinity considerably reduced microbial alpha-diversity and niche breadth while increasing within-group similarity among various lake types. High salinity additionally decreased the complexity of microbial networks and enhanced network robustness. The assembly of microbial communities was primarily governed by deterministic processes in high-salinity and eutrophic low-salinity lakes. At decreased salinity, trophic level played a leading role in shaping microbial community structure, and the ecological processes shifted from deterministic processes driven by high salinity to eutrophication-driven deterministic processes. The biomarkers also varied from taxa adapted to high-salinity environments (e.g., Nanoarchaeaeota, Rhodothermia) to those suited for living in freshwater and low-salinity habitats (e.g., Alphaproteobacteria, Actinobacteria). In the case of eutrophication, Actinobacteria, Chloroflexi, and Cyanobacteria became the dominant taxa. Our findings indicate that decreased salinity enables trophic level to play an enhanced role in shaping microbial community structure and assembly in plateau lakes. This study enriches our knowledge about the ecological impacts of salinization and eutrophication in plateau lakes.
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Affiliation(s)
- Xing Liu
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi Province, China
| | - Baozhu Pan
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi Province, China.
| | - Xinyuan Liu
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi Province, China
| | - Xu Han
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi Province, China
| | - Penghui Zhu
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi Province, China
| | - Gang Li
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi Province, China
| | - Dianbao Li
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, Shaanxi Province, China
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Lozano IL, González-Olalla JM, Medina-Sánchez JM. New Insights for the Renewed Phytoplankton-Bacteria Coupling Concept: the Role of the Trophic Web. MICROBIAL ECOLOGY 2023; 86:810-824. [PMID: 36574041 DOI: 10.1007/s00248-022-02159-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 12/08/2022] [Indexed: 07/12/2023]
Abstract
It is widely accepted that in many aquatic ecosystems bacterioplankton is dependent on and regulated by organic carbon supplied by phytoplankton, leading to coupled algae-bacteria relationship. In this study, an in-depth analysis of this relationship has been carried out by combining two approaches: (i) a correlation analyses between heterotrophic bacterial production (BP) vs. primary production (PP) or algal excretion of organic carbon (EOC), (ii) the balance between bacterial carbon demands (BCD) and the supply of C as EOC, measured as BCD:EOC ratio. During the study period (2013-2016), the algae-bacteria relationship was constantly changing from a coupling in 2013, uncoupling in 2014 and 2015, and an incipient return to coupling (in 2016). Our results show that top-down control (bacterivory) by algal mixotrophy acts as a decoupling force since it provides a fresh C source different to algal EOC to satisfy bacterial carbon demands. Notably, a relationship between the BCD:EOC ratio and the ecosystem metabolic balance (Primary production (PP): respiration (R)) was found, suggesting that PP:R may be a good predictor of the algae-bacteria coupling. This analysis, including the comparison between basal and potential ecosystem metabolic balance, can be a tool to improve knowledge on the interaction between both biotics compartments, which the traditional analyses on coupling may not capture.
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Affiliation(s)
- I L Lozano
- Department of Forest Sciences, University of Helsinki, 00014, Helsinki, Finland
- Institute for Atmospheric and Earth System Research, University of Helsinki, 00014, Helsinki, Finland
| | - J M González-Olalla
- Department of Watershed Sciences, Utah State University, Utah, 84322, USA.
- University Institute of Water Research, University of Granada, 18071, Granada, Spain.
| | - J M Medina-Sánchez
- University Institute of Water Research, University of Granada, 18071, Granada, Spain
- Department of Ecology, Faculty of Sciences, University of Granada, 18071, Granada, Spain
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3
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Chifflet S, Briant N, Freydier R, Araújo DF, Quéméneur M, Zouch H, Bellaaj-Zouari A, Carlotti F, Tedetti M. Isotopic compositions of copper and zinc in plankton from the Mediterranean Sea (MERITE-HIPPOCAMPE campaign): Tracing trophic transfer and geogenic inputs. MARINE POLLUTION BULLETIN 2022; 185:114315. [PMID: 36368082 DOI: 10.1016/j.marpolbul.2022.114315] [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: 07/27/2022] [Revised: 10/09/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
This study uses Cu and Zn isotopic compositions as proxies of sources and metal transfers in the planktonic food webs from the Mediterranean Sea. Plankton was collected in spring 2019 in the deep chlorophyll maximum (DCM) along a North-South transect including coastal and offshore zones (MERITE-HIPPOCAMPE campaign). δ65Cu and δ66Zn were determined on four planktonic size fractions from 60 to 2000 μm. Combined δ65Cu and δ66Zn with geochemical tracers (Ti, particulate organic phosphorus) showed that geogenic particles were ubiquitous with plankton assemblages. The δ15N ecological tracer showed that planktonic food web was enriched in heavy isotopes of Cu and Zn in the higher trophic levels. δ65Cu were correlated with picoplankton in the offshore zone, and with zooplankton in the southern coastal zone. Firmicutes bacteria were found correlated with δ66Zn in northern and southern coastal zones suggesting decomposition of particulate matter at the DCM. These findings suggest that biogeochemical process may impact Cu and Zn isotopy in the planktonic community.
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Affiliation(s)
- Sandrine Chifflet
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France.
| | - Nicolas Briant
- Ifremer, CCEM Contamination Chimique des Écosystèmes Marins, F-44000 Nantes, France
| | - Rémi Freydier
- HSM, Université de Montpellier, CNRS, Montpellier, France
| | - Daniel F Araújo
- Ifremer, CCEM Contamination Chimique des Écosystèmes Marins, F-44000 Nantes, France
| | - Marianne Quéméneur
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Hana Zouch
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia
| | - Amel Bellaaj-Zouari
- Institut National des Sciences et Technologies de la Mer (INSTM), 28, rue 2 mars 1934, Salammbô 2025, Tunisia
| | - François Carlotti
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Marc Tedetti
- Aix Marseille Univ., Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
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Garate L, Alonso‐Sáez L, Revilla M, Logares R, Lanzén A. Shared and contrasting associations in the dynamic nano- and picoplankton communities of two close but contrasting sites from the Bay of Biscay. Environ Microbiol 2022; 24:6052-6070. [PMID: 36054533 PMCID: PMC10087561 DOI: 10.1111/1462-2920.16153] [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: 04/01/2022] [Accepted: 07/30/2022] [Indexed: 01/12/2023]
Abstract
Pico- and nanoplankton are key players in the marine ecosystems due to their implication in the biogeochemical cycles, nutrient recycling and the pelagic food webs. However, the specific dynamics and niches of most bacterial, archaeal and eukaryotic plankton remain unknown, as well as the interactions between them. Better characterization of these is critical for understanding and predicting ecosystem functioning under anthropogenic pressures. We used environmental DNA metabarcoding across a 6-year time series to explore the structure and seasonality of pico- and nanoplankton communities in two sites of the Bay of Biscay, one coastal and one offshore, and construct association networks to reveal potential keystone and connector taxa. Temporal trends in alpha diversity were similar between the two sites, and concurrent communities more similar than within the same site at different times. However, we found differences between the network topologies of the two sites, with both shared and site-specific keystones and connectors. For example, Micromonas, with lower abundance in the offshore site is a keystone here, indicating a stronger effect of associations such as resource competition. This study provides an example of how time series and association network analysis can reveal how similar communities may function differently despite being geographically close.
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Affiliation(s)
- Leire Garate
- AZTI, Marine ResearchBasque Research and Technology Alliance (BRTA)PasaiaSpain
| | - Laura Alonso‐Sáez
- AZTI, Marine ResearchBasque Research and Technology Alliance (BRTA)PasaiaSpain
| | - Marta Revilla
- AZTI, Marine ResearchBasque Research and Technology Alliance (BRTA)PasaiaSpain
| | - Ramiro Logares
- Institute of Marine Sciences (ICM)CSICBarcelonaCataloniaSpain
| | - Anders Lanzén
- AZTI, Marine ResearchBasque Research and Technology Alliance (BRTA)PasaiaSpain
- IKERBASQUEBasque Foundation for ScienceBilbaoBizkaiaSpain
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Geng Y, Peng C, Zhou W, Huang S, Zhou P, Wang Z, Qin H, Li D. Gradient rise in seepage pollution levels in tailings ponds shapes closer linkages between phytoplankton and bacteria. JOURNAL OF HAZARDOUS MATERIALS 2022; 437:129432. [PMID: 35753300 DOI: 10.1016/j.jhazmat.2022.129432] [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: 04/19/2022] [Revised: 06/17/2022] [Accepted: 06/18/2022] [Indexed: 05/14/2023]
Abstract
A large number of tailings ponds formed by slag accumulation have become serious environmental hazards. Spatially high potential energy and long-term accumulation may result in gradient-changing seepage pollution. The assemblages of phytoplankton and bacteria are widely used as assessment indicators. In this study, we investigate the changes in phytoplankton and bacterial assemblages in tailing pollution. The results showed that there are temporal and spatial variabilities in seepage pollution. The abundance and diversity of phytoplankton and bacteria decreased with increasing pollution. However, Synedra acus (diatom) and Polynucleobacter (bacteria) were positively correlated with pollution levels (r = 0.37, P < 0.05; r = 0.24, P < 0.05). Heavy metals are the main contributors to bacterial changes (16.46%), while nutrients are for algae (13.24%). Tailings pond pollution reduced the number of phytoplankton and bacterial linkages. However, more pollution broke the originally independent modules of phytoplankton and bacteria, and they produced more positive correlations (79.39%; 87.68%). Microcystis sp. and Limnobacter were the key nodes of the co-occurrence network in the polluted areas. Exploring the interactions between bacteria and phytoplankton within different pollution levels could provide insights into biological interaction patterns and the bioremediation of tailings ponds.
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Affiliation(s)
- Yuchen Geng
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chengrong Peng
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Weicheng Zhou
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shun Huang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Panpan Zhou
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhicong Wang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Hongjie Qin
- Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Key Lab of Comprehensive Innovative Utilization of Ornamental Plant Germplasm, Guangzhou 510640, China
| | - Dunhai Li
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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6
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Coclet C, Garnier C, Durrieu G, D'onofrio S, Layglon N, Briand JF, Misson B. Impacts of copper and lead exposure on prokaryotic communities from contaminated contrasted coastal seawaters: the influence of previous metal exposure. FEMS Microbiol Ecol 2020; 96:5809961. [PMID: 32188980 DOI: 10.1093/femsec/fiaa048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 03/17/2020] [Indexed: 01/04/2023] Open
Abstract
Our understanding of environmental factors controlling prokaryotic community is largely hampered by the large environmental variability across spatial scales (e.g. trace metal contamination, nutrient enrichment and physicochemical variations) and the broad diversity of bacterial pre-exposure to environmental factors. In this article, we investigated the specific influence of copper (Cu) and lead (Pb) on prokaryotic communities from the uncontaminated site, using mesocosm experiments. In addition, we studied how pre-exposure (i.e. life history) affects communities, with reference to previous metal exposure on the response of three prokaryotic communities to similar Cu exposition. This study showed a stronger influence of Cu contamination than Pb contamination on prokaryotic diversity and structure. We identified 12 and 34 bacterial families and genera, respectively, contributing to the significant differences observed in community structure between control and spiked conditions. Taken altogether, our results point toward a combination of direct negative responses to Cu contamination and indirect responses mediated by interaction with phytoplankton. These identified responses were largely conditioned by the previous exposure of community to contaminants.
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Affiliation(s)
- Clément Coclet
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 83041 Toulon, Cedex 9, Franc.,Université de Toulon, MAPIEM, EA 4323, Toulon, 83041 Toulon, Cedex 9, Franc
| | - Cédric Garnier
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 83041 Toulon, Cedex 9, Franc
| | - Gaël Durrieu
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 83041 Toulon, Cedex 9, Franc
| | - Sébastien D'onofrio
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 83041 Toulon, Cedex 9, Franc
| | - Nicolas Layglon
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 83041 Toulon, Cedex 9, Franc
| | | | - Benjamin Misson
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM 110, 83041 Toulon, Cedex 9, Franc
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Layglon N, Misson B, Durieu G, Coclet C, D'Onofrio S, Dang DH, François D, Mullot JU, Mounier S, Lenoble V, Omanović D, Garnier C. Long-term monitoring emphasizes impacts of the dredging on dissolved Cu and Pb contamination along with ultraplankton distribution and structure in Toulon Bay (NW Mediterranean Sea, France). MARINE POLLUTION BULLETIN 2020; 156:111196. [PMID: 32510358 DOI: 10.1016/j.marpolbul.2020.111196] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 04/16/2020] [Accepted: 04/16/2020] [Indexed: 06/11/2023]
Abstract
A long-term monitoring during dredging and non-dredging periods was performed. Total and dissolved Cu and Pb concentrations, DGT-labile Pb, ultraphytoplankton abundance and structure were monitored at four sites: dredging site, dumping site (inside/outside of a geotextile bag) and reference site. During the reference period (non-dredging), an increasing contamination in Pb, Cu and a progressive shift from Synechococcus to photosynthetic picoeukaryotes dominance was observed from reference to dumping site. Pb concentrations were significantly higher during dredging period, pointing out sediment resuspension as Pb major source of contamination. Unlike Pb, Cu concentrations were not statistically different during the two periods. Dredging period did not impact on ultraphytoplankton abundance and structure but influence heterotrophic prokaryotes abundance. Sediment resuspension is therefore a major driver of chemical and biological qualities in Toulon Bay. Furthermore, although the geotextile bag reduces particulate transport of the dredged sediment, the transport in the dissolved phase remains a major problem.
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Affiliation(s)
- Nicolas Layglon
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, France.
| | - Benjamin Misson
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, France
| | - Gaël Durieu
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, France
| | - Clément Coclet
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, France; MAPIEM, EA4323, Université de Toulon, Toulon, France
| | - Sébastien D'Onofrio
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, France
| | - Duc Huy Dang
- School of the Environment, Chemistry Department, Trent University, Peterborough, ON, Canada
| | - David François
- LASEM-Toulon, Base Navale De Toulon, BP 61, 83800 Toulon, France
| | | | - Stéphane Mounier
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, France
| | - Véronique Lenoble
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, France
| | - Dario Omanović
- Center for Marine and Environmental Research, Ruđer Bošković Institute, P.O. Box 180, 10002 Zagreb, Croatia
| | - Cédric Garnier
- Université de Toulon, Aix Marseille Université, CNRS, IRD, Mediterranean Institute of Oceanography (MIO), UM110, France
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Bancon-Montigny C, Gonzalez C, Delpoux S, Avenzac M, Spinelli S, Mhadhbi T, Mejri K, Hlaili AS, Pringault O. Seasonal changes of chemical contamination in coastal waters during sediment resuspension. CHEMOSPHERE 2019; 235:651-661. [PMID: 31276878 DOI: 10.1016/j.chemosphere.2019.06.213] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 06/20/2019] [Accepted: 06/27/2019] [Indexed: 06/09/2023]
Abstract
The potential of remobilization of pollutants is a major problem for anthropogenic ecosystems, because even when the anthropogenic source of pollution is identified and removed, pollutants stored in sediments can be released into the water column and impact pelagic communities during sediment resuspension provoked by dredging, storms or bottom trawling. The objectives of the present study were to assess the changes observed in the chemical composition of the water column following resuspension of a polluted marine sediment and the consequences for the chemical composition of adjacent marine waters according to season. For that purpose, an experimental sediment resuspension protocol was performed on four distinct occasions, spring, summer, fall and winter, and the changes in nutrients, organic contaminants and inorganic contaminants were measured after mixing sediment elutriate with lagoon waters and offshore waters sampled nearby. Significant seasonal variations in the chemical composition of the contaminated sediments were observed, with a strong accumulation of PAHs in fall, whereas minimum PAH concentrations were observed during winter. In all seasons, sediment resuspension provoked a significant enrichment in nutrients, dissolved organic carbon, and trace metal elements like Ni, Cu, and Zn in offshore waters and lagoon waters, with enrichment factors that were season and site dependent. The most pronounced changes were observed for offshore waters, especially in spring and winter, whereas the chemical composition of lagoon waters was weakly impacted by the compounds supplied by sediment resuspension.
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Affiliation(s)
- Chrystelle Bancon-Montigny
- UMR 5569 HydroSciences HSM Université Montpellier, CNRS, IRD 300, avenue du Professeur Emile Jeanbrau, CC57 34090, Montpellier, cedex 5, France
| | - Catherine Gonzalez
- IMT Mines Alès, University of Montpellier, 6 avenue de Clavières, 30319, Alès, cedex, France
| | - Sophie Delpoux
- UMR 5569 HydroSciences HSM Université Montpellier, CNRS, IRD 300, avenue du Professeur Emile Jeanbrau, CC57 34090, Montpellier, cedex 5, France
| | - Muriel Avenzac
- IMT Mines Alès, University of Montpellier, 6 avenue de Clavières, 30319, Alès, cedex, France
| | - Sylvie Spinelli
- IMT Mines Alès, University of Montpellier, 6 avenue de Clavières, 30319, Alès, cedex, France
| | - Takoua Mhadhbi
- IMT Mines Alès, University of Montpellier, 6 avenue de Clavières, 30319, Alès, cedex, France; Faculté des Sciences de Bizerte, Université de Carthage, 7021, Zarzouna, Tunisia
| | - Kaouther Mejri
- Faculté des Sciences de Bizerte, Université de Carthage, 7021, Zarzouna, Tunisia
| | - Asma Sakka Hlaili
- Faculté des Sciences de Bizerte, Université de Carthage, 7021, Zarzouna, Tunisia
| | - Olivier Pringault
- Faculté des Sciences de Bizerte, Université de Carthage, 7021, Zarzouna, Tunisia; UMR 9190 MARBEC IRD-Ifremer-CNRS-Université de Montpellier, Place Eugène Bataillon, case 093, 34095, Montpellier, cedex 5, France; UMR 110 MIO Mediterranean Institute of Oceanography, Aix Marseille University, University of Toulon, CNRS, IRD, Marseille, France.
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Coclet C, Garnier C, Durrieu G, Omanović D, D’Onofrio S, Le Poupon C, Mullot JU, Briand JF, Misson B. Changes in Bacterioplankton Communities Resulting From Direct and Indirect Interactions With Trace Metal Gradients in an Urbanized Marine Coastal Area. Front Microbiol 2019; 10:257. [PMID: 30853948 PMCID: PMC6395402 DOI: 10.3389/fmicb.2019.00257] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 01/31/2019] [Indexed: 01/21/2023] Open
Abstract
Unraveling the relative importance of both environmental conditions and ecological processes regulating bacterioplankton communities is a central goal in microbial ecology. Marine coastal environments are among the most urbanized areas and as a consequence experience environmental pressures. The highly anthropized Toulon Bay (France) was considered as a model system to investigate shifts in bacterioplankton communities along natural and anthropogenic physicochemical gradients during a 1-month survey. In depth geochemical characterization mainly revealed strong and progressive Cd, Zn, Cu, and Pb contamination gradients between the entrance of the Bay and the north-western anthropized area. On the other hand, low-amplitude natural gradients were observed for other environmental variables. Using 16S rRNA gene sequencing, we observed strong spatial patterns in bacterioplankton taxonomic and predicted function structure along the chemical contamination gradient. Variation partitioning analysis demonstrated that multiple metallic contamination explained the largest part of the spatial biological variations observed, but DOC and salinity were also significant contributors. Network analysis revealed that biotic interactions were far more numerous than direct interactions between microbial groups and environmental variables. This suggests indirect effects of the environment, and especially trace metals, on the community through a few taxonomic groups. These spatial patterns were also partially found for predicted bacterioplankton functions, thus indicating a limited functional redundancy. All these results highlight both potential direct influences of trace metals contamination on coastal bacterioplankton and indirect forcing through biotic interactions and cascading.
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Affiliation(s)
- Clément Coclet
- Mediterranean Institute of Oceanography (MIO), UM110, CNRS, IRD, Université de Toulon, Aix-Marseille Université, Marseille, France
- MAPIEM, EA 4323, Université de Toulon, Toulon, France
| | - Cédric Garnier
- Mediterranean Institute of Oceanography (MIO), UM110, CNRS, IRD, Université de Toulon, Aix-Marseille Université, Marseille, France
| | - Gaël Durrieu
- Mediterranean Institute of Oceanography (MIO), UM110, CNRS, IRD, Université de Toulon, Aix-Marseille Université, Marseille, France
| | - Dario Omanović
- Division for Marine and Environmental Research, Ruđer Bošković Institute, Zagreb, Croatia
| | - Sébastien D’Onofrio
- Mediterranean Institute of Oceanography (MIO), UM110, CNRS, IRD, Université de Toulon, Aix-Marseille Université, Marseille, France
| | - Christophe Le Poupon
- Mediterranean Institute of Oceanography (MIO), UM110, CNRS, IRD, Université de Toulon, Aix-Marseille Université, Marseille, France
| | | | | | - Benjamin Misson
- Mediterranean Institute of Oceanography (MIO), UM110, CNRS, IRD, Université de Toulon, Aix-Marseille Université, Marseille, France
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Kang L, He Y, Dai L, He Q, Ai H, Yang G, Liu M, Jiang W, Li H. Interactions between suspended particulate matter and algal cells contributed to the reconstruction of phytoplankton communities in turbulent waters. WATER RESEARCH 2019; 149:251-262. [PMID: 30448737 DOI: 10.1016/j.watres.2018.11.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/26/2018] [Accepted: 11/01/2018] [Indexed: 06/09/2023]
Abstract
The effect of turbulence on phytoplankton growth has been widely studied; however, its effects with respects to suspended particulate matter (SPM) on the development of phytoplankton communities and the behavioral responses of phytoplankton to turbulence and SPM are poorly understood. Here, an approximately homogeneous turbulence simulation system (AHTS, mainly consisting of an oscillating-grid apparatus) was established to gain insight into the mechanisms underlying phytoplankton community responses in turbid, well-mixed waters. The results revealed that maintaining the turbulence dissipation rates (Ɛ) of 2.25 × 10-3 and 1.80 × 10-2 m2/s3 caused significant reductions in algal density, and the effects could be substantially enhanced when 500 mg/L of SPM were added before day 12. In contrast to the constant decrease of algal density for the Ɛ of 2.25 × 10-3 m2/s3, a dramatic increase in the phytoplankton density occurred after 16 days of incubation for a Ɛ of 1.80 × 10-2 m2/s3, irrespective of SPM. Addition of SPM in the Ɛ of 1.80 × 10-2 m2/s3 treatments did not considerably affect the algal density profile compared to that without SPM, of which unicellular algae decreased and colonial algae dominated the phytoplankton community. On the other hand, the phytoplankton can regulate the SPM properties. During the 18 days' coincubation, extracellular polymeric substances (EPS) released from algal cells induced larger particle sizes and round surfaces of SPM, which can reduce the damage received to algal cells. Here we demonstrated that the phytoplankton communities could actively counteract the effects of turbulence + SPM and adapt the couple stress, jointly through the release of EPS, the modification of SPM surface properties and the conversion of their assemblage pattern, thereby contributing to rebalance the ecosystem. These findings highlight the strategies employed during the reconstruction of phytoplankton under the dual effects of turbulence and SPM for the first time, consequently enabling the forecasting of the dominant species of phytoplankton in turbulent waters.
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Affiliation(s)
- Li Kang
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Yixin He
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Lichun Dai
- Biomass Energy Technology Research Center, Biogas Institute of Ministry of Agriculture, Chengdu, 610041, China
| | - Qiang He
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Hainan Ai
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Guofeng Yang
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Ming Liu
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Wei Jiang
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China
| | - Hong Li
- Key Laboratory of Eco-Environment of Three Gorges Region, Ministry of Education, Chongqing University, Chongqing, 400044, China.
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11
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M'rabet C, Kéfi-Daly Yahia O, Couet D, Gueroun SKM, Pringault O. Consequences of a contaminant mixture of bisphenol A (BPA) and di-(2-ethylhexyl) phthalate (DEHP), two plastic-derived chemicals, on the diversity of coastal phytoplankton. MARINE POLLUTION BULLETIN 2019; 138:385-396. [PMID: 30660288 DOI: 10.1016/j.marpolbul.2018.11.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 11/13/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
To assess the impact of two plastic derived chemicals: bisphenol A (BPA) and the di-2-ethylhexyl phthalate (DEHP), on phytoplankton biomass and community structure, microcosm incubations were performed during spring and summer, with offshore and lagoon waters of a south-western Mediterranean ecosystem. Phytoplankton were exposed to an artificial mixture of BPA and DEHP and to marine water previously enriched with plastic-derivative compounds, originated from in situ water incubations of plastic debris for 30 days. After 96 h of incubation, changes were observed in phytoplankton biomass in the contaminated microcosms, with a net decrease (up to 50% of the control) in the concentration of Chlorophyll a in offshore waters. Concomitantly, plastic-derivative contamination provoked structural changes, especially for offshore waters. This suggests a relative tolerance of the lagoon communities to BPA and DEHP contamination, related to the dominance of Chaetoceros spp., which could potentially be used as a bioindicator in bioassessment studies.
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Affiliation(s)
- Charaf M'rabet
- Research Group on Oceanography and Plankton Ecology, Tunisian National Agronomic Institute (INAT), IRESA - Carthage University, R.U 13ES36 - Marine Biology (University of Tunis-El Manar I), 43 Avenue Charles Nicolle, 1082 Tunis, Tunisia; UMR 9190 MARBEC IRD-Ifremer-CNRS-Université de Montpellier, Place Eugène Bataillon, Case 093, 34095 Montpellier Cedex, France.
| | - Ons Kéfi-Daly Yahia
- Research Group on Oceanography and Plankton Ecology, Tunisian National Agronomic Institute (INAT), IRESA - Carthage University, R.U 13ES36 - Marine Biology (University of Tunis-El Manar I), 43 Avenue Charles Nicolle, 1082 Tunis, Tunisia
| | - Douglas Couet
- UMR 9190 MARBEC IRD-Ifremer-CNRS-Université de Montpellier, Place Eugène Bataillon, Case 093, 34095 Montpellier Cedex, France
| | - Sonia Khadija Maïté Gueroun
- Laboratory of Aquatic Systems Biodiversity and Functioning, Faculty of Sciences of Bizerte, 7021 Zarzouna Bizerte, University of Carthage, Tunisia
| | - Olivier Pringault
- UMR 9190 MARBEC IRD-Ifremer-CNRS-Université de Montpellier, Place Eugène Bataillon, Case 093, 34095 Montpellier Cedex, France; Faculty of Sciences of Bizerte, 7021 Zarzouna Bizerte, University of Carthage, Tunisia
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12
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Zouch H, Cabrol L, Chifflet S, Tedetti M, Karray F, Zaghden H, Sayadi S, Quéméneur M. Effect of Acidic Industrial Effluent Release on Microbial Diversity and Trace Metal Dynamics During Resuspension of Coastal Sediment. Front Microbiol 2018; 9:3103. [PMID: 30619182 PMCID: PMC6302000 DOI: 10.3389/fmicb.2018.03103] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 11/30/2018] [Indexed: 12/05/2022] Open
Abstract
Both industrial effluent discharge and the resuspension of contaminated marine sediments are important sources of trace metals in seawater which potentially affect marine ecosystems. The aim of this study was to evaluate the impact of the industrial wastewaters having acidic pH (2–3) and containing trace metals on microbial diversity in the coastal ecosystem of the Gulf of Gabès (Tunisia, southern Mediterranean Sea) subjected to resuspension events of marine sediments. Four trace elements (As, Cd, U, and V) were monitored during 10-day sediment resuspension experiments. The highest enrichment in the seawater dissolved phase was observed for Cd followed by U, V, and As. Cd remobilization was improved by indigenous microbial community, while U release was mainly abiotic. Acidic effluent addition impacted both trace metal distribution and microbial diversity, particularly that of the abundant phylum Bacteroidetes. Members of the order Saprospirales were enriched from sediment in natural seawater (initial pH > 8), while the family Flavobacteriaceae was favored by acidified seawater (initial pH < 8). Some Flavobacteriaceae members were identified as dominant species in both initial sediment and experiments with acidic wastewater, in which their relative abundance increased with increasing dissolved Cd levels. It could be therefore possible to consider them as bioindicators of metal pollution and/or acidification in marine ecosystems.
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Affiliation(s)
- Hana Zouch
- Laboratory of Environmental Bioprocesses, Biotechnology Center of Sfax, Sfax, Tunisia.,Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Léa Cabrol
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Sandrine Chifflet
- Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Marc Tedetti
- Laboratory of Environmental Bioprocesses, Biotechnology Center of Sfax, Sfax, Tunisia.,Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
| | - Fatma Karray
- Laboratory of Environmental Bioprocesses, Biotechnology Center of Sfax, Sfax, Tunisia
| | - Hatem Zaghden
- Laboratory of Environmental Bioprocesses, Biotechnology Center of Sfax, Sfax, Tunisia
| | - Sami Sayadi
- Laboratory of Environmental Bioprocesses, Biotechnology Center of Sfax, Sfax, Tunisia
| | - Marianne Quéméneur
- Laboratory of Environmental Bioprocesses, Biotechnology Center of Sfax, Sfax, Tunisia.,Aix Marseille Univ, Université de Toulon, CNRS, IRD, MIO UM 110, Marseille, France
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