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Jupke JF, Birk S, Apostolou A, Aroviita J, Baattrup-Pedersen A, Baláži P, Barešová L, Blanco S, Borrego-Ramos M, van Dam H, Dimitriou E, Feld CK, Ferreira MT, Gecheva G, Gomà J, Hanžek N, Haslev IM, Isheva T, Jamoneau A, Jyrkänkallio-Mikkola J, Kahlert M, Karaouzas I, Karjalainen SM, Olenici A, Panek P, Paril P, Peeters ETHM, Polášek M, Pont D, Pumputyte A, Sandin L, Sochuliaková L, Soininen J, Stanković I, Straka M, Šušnjara M, Sutela T, Tison-Rosebery J, Udovič MG, Verhofstad M, Žutinić P, Schäfer RB. European river typologies fail to capture diatom, fish, and macrophyte community composition. Sci Total Environ 2023; 896:165081. [PMID: 37355122 DOI: 10.1016/j.scitotenv.2023.165081] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/16/2023] [Accepted: 06/21/2023] [Indexed: 06/26/2023]
Abstract
Typology systems are frequently used in applied and fundamental ecology and are relevant for environmental monitoring and conservation. They aggregate ecosystems into discrete types based on biotic and abiotic variables, assuming that ecosystems of the same type are more alike than ecosystems of different types with regard to a specific property of interest. We evaluated whether this assumption is met by the Broad River Types (BRT), a recently proposed European river typology system, that classifies river segments based on abiotic variables, when it is used to group biological communities. We compiled data on the community composition of diatoms, fishes, and aquatic macrophytes throughout Europe and evaluated whether the composition is more similar in site groups with the same river type than in site groups of different river types using analysis of similarities, classification strength, typical species analysis, and the area under zeta diversity decline curves. We compared the performance of the BRT with those of four region-based typology systems, namely, Illies Freshwater Ecoregions, the Biogeographic Regions, the Freshwater Ecoregions of the World, and the Environmental Zones, as well as spatial autocorrelation (SA) classifications. All typology systems received low scores from most evaluation methods, relative to predefined thresholds and the SA classifications. The BRT often scored lowest of all typology systems. Within each typology system, community composition overlapped considerably between site groups defined by the types of the systems. The overlap tended to be the lowest for fishes and between Illies Freshwater Ecoregions. In conclusion, we found that existing broad-scale river typology systems fail to delineate site groups with distinct and compositionally homogeneous communities of diatoms, fishes, and macrophytes. A way to improve the fit between typology systems and biological communities might be to combine segment-based and region-based typology systems to simultaneously account for local environmental variation and historical distribution patterns, thus potentially improving the utility of broad-scale typology systems for freshwater biota.
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Affiliation(s)
- Jonathan F Jupke
- Institute for Environmental Sciences iES, RPTU Kaiserslautern-Landau, Campus Landau, Fortstraße 7, 76829 Landau, Germany.
| | - Sebastian Birk
- Faculty of Biology, Department of Aquatic Ecology, University of Duisburg-Essen, 45117 Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, 45117 Essen, Germany
| | - Apostolos Apostolou
- Department of Aquatic Ecosystems, Institute for Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Gagarin 2, Sofia 1113, Bulgaria
| | - Jukka Aroviita
- Finnish Environment Institute, Paavo Havaksen tie 3, 90570 Oulu, Finland
| | | | - Peter Baláži
- Water Research Institute, Nabr. arm. gen. L. Svobodu 7, 81249 Bratislava, Slovakia
| | - Libuše Barešová
- Czech Hydrometeorological Institute, Na Šabatce 17, 143 06 Praha, Czech Republic
| | - Saúl Blanco
- Diatom Lab, Universidad de León, La Serna 58, E24007 Leon, Spain
| | | | - Herman van Dam
- Consultancy for Water and Nature, Spyridon Louisweg 141, 1034 WR Amsterdam, the Netherlands
| | - Elias Dimitriou
- Institute of Marine Biological Resources & Inland Waters, Hellenic Centre for Marine Research, 46.7 km Athens-Sounio Av., 19013 Anavyssos, Attica, Greece
| | - Christian K Feld
- Faculty of Biology, Department of Aquatic Ecology, University of Duisburg-Essen, 45117 Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, 45117 Essen, Germany
| | - Maria Teresa Ferreira
- Forest Research Centre and Associate Laboratory TERRA, Instituto Superior de Agronomia, Tapada da Ajuda, 1349-017 Lisboa, Portugal
| | - Gana Gecheva
- Faculty of Biology, Plovdiv University, Tsar Asen 24, 4000 Plovdiv, Bulgaria
| | - Joan Gomà
- Faculty of Biology, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
| | - Nikola Hanžek
- Josip Juraj Strossmayer Water Institute, Ulica grada Vukovara 220, HR-10000 Zagreb, Croatia
| | | | - Tsvetelina Isheva
- Department of Aquatic Ecosystems, Institute for Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Gagarin 2, Sofia 1113, Bulgaria
| | | | | | - Maria Kahlert
- Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, PO Box 7050, 750 07 Uppsala, Sweden
| | - Ioannis Karaouzas
- Institute of Marine Biological Resources & Inland Waters, Hellenic Centre for Marine Research, 46.7 km Athens-Sounio Av., 19013 Anavyssos, Attica, Greece
| | | | - Adriana Olenici
- Diatom Lab, Universidad de León, La Serna 58, E24007 Leon, Spain; Babeș-Bolyai University, Faculty of Environmental Sciences and Engineering, Fântânele Street, No. 30, 400294 Cluj-Napoca, Romania
| | - Piotr Panek
- Chief Inspectorate for Environmental Protection, ul. Bitwy Warszawskiej 1920 r. 3, 02-362 Warszawa, Poland
| | - Petr Paril
- Department of Botany and Zoology, Faculty of Science, Masaryk University, 61137, Brno, Czech Republic
| | - Edwin T H M Peeters
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Marek Polášek
- Department of Botany and Zoology, Faculty of Science, Masaryk University, 61137, Brno, Czech Republic
| | - Didier Pont
- Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences, Gregor-MendelStrasse 33, Vienna, Austria
| | - Audrone Pumputyte
- Aplinkos apsaugos agentūra, A Juozapavičiaus g.9, 09311 Vilnius, Lithuania
| | - Leonard Sandin
- Norwegian institute for nature research (NINA), Lillehammer, Norway
| | - Lucia Sochuliaková
- Department of Biology and Ecology, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, 97401 Banská Bystrica, Slovakia
| | - Janne Soininen
- Department of Geosciences and Geography, PO Box 64, Fi-00014, University of Helsinki, Finland
| | - Igor Stanković
- Josip Juraj Strossmayer Water Institute, Ulica grada Vukovara 220, HR-10000 Zagreb, Croatia
| | - Michal Straka
- Department of Botany and Zoology, Faculty of Science, Masaryk University, 61137, Brno, Czech Republic; T.G. Masaryk Water Research Institute, 612 00, Brno, Czech Republic
| | - Mirela Šušnjara
- Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
| | - Tapio Sutela
- Natural Resources Institute Finland, Paavo Havaksen tie 3, 90570 Oulu, Finland
| | | | | | - Michiel Verhofstad
- FLORON: Plant Conservation Netherlands, Toernooiveld 1, 6525ED Nijmegen, the Netherlands
| | - Petar Žutinić
- Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
| | - Ralf B Schäfer
- Institute for Environmental Sciences iES, RPTU Kaiserslautern-Landau, Campus Landau, Fortstraße 7, 76829 Landau, Germany
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Tison-Rosebery J, Boutry S, Bertrin V, Leboucher T, Morin S. A new diatom-based multimetric index to assess lake ecological status. Environ Monit Assess 2023; 195:1202. [PMID: 37702871 PMCID: PMC10499699 DOI: 10.1007/s10661-023-11855-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/06/2023] [Indexed: 09/14/2023]
Abstract
Eutrophication impairs lake ecosystems at a global scale. In this context, as benthic microalgae are well-established warnings for a large range of stressors, particularly nutrient enrichment, the Water Framework Directive required the development of diatom-based methods to monitor lake eutrophication. Here, we present the diatom-based index we developed for French lakes, named IBDL (Indice Biologique Diatomées en Lacs). Data were collected in 93 lakes from 2015 to 2020. A challenge arose from the discontinuous pressure gradient of our dataset, especially the low number of nutrient-impacted lakes. To analyze the data we opted for the so-called "Threshold Indicator Taxa ANalysis" method, which makes it possible to determine a list of "alert taxa." We obtained a multimetric index based on specific pressure gradients (Kjeldahl nitrogen, suspended matter, biological oxygen demand, and total phosphorous). Considering the European intercalibration process, the very good correlation between IBDL and the common metric (R2 from 0.52 to 0.87 according to the lake alkalinity type) makes us very confident in our ability to match future IBDL quality thresholds with European standards. The IBDL proved at last to be particularly relevant as it has a twofold interest: an excellent relationship with total phosphorus (R2 from 0.63 to 0.83 according to the lake alkalinity type) and a possible application to any lake metatype. Its complementarity with macrophyte-based indices moreover justifies the use of at least two primary producer components for lake ecological status classification.
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Affiliation(s)
- J Tison-Rosebery
- INRAE, UR EABX, 33612, Cestas, France.
- Pôle R&D ECLA, Le Bourget-du-Lac, France.
| | - S Boutry
- INRAE, UR EABX, 33612, Cestas, France
- Pôle R&D ECLA, Le Bourget-du-Lac, France
| | - V Bertrin
- INRAE, UR EABX, 33612, Cestas, France
- Pôle R&D ECLA, Le Bourget-du-Lac, France
| | - T Leboucher
- Université de Lorraine, CNRS, LIEC, 57000, Metz, France
| | - S Morin
- INRAE, UR EABX, 33612, Cestas, France
- Pôle R&D ECLA, Le Bourget-du-Lac, France
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Passy SI, Mruzek JL, Budnick WR, Leboucher T, Jamoneau A, Chase JM, Soininen J, Sokol ER, Tison-Rosebery J, Vilmi A, Wang J, Larson CA. On the shape and origins of the freshwater species-area relationship. Ecology 2023; 104:e3917. [PMID: 36336908 DOI: 10.1002/ecy.3917] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 08/25/2022] [Accepted: 10/06/2022] [Indexed: 11/09/2022]
Abstract
The species-area relationship (SAR) has over a 150-year-long history in ecology, but how its shape and origins vary across scales and organisms remains incompletely understood. This is the first subcontinental freshwater study to examine both these properties of the SAR in a spatially explicit way across major organismal groups (diatoms, insects, and fish) that differ in body size and dispersal capacity. First, to describe the SAR shape, we evaluated the fit of three commonly used models, logarithmic, power, and Michaelis-Menten. Second, we proposed a hierarchical framework to explain the variability in the SAR shape, captured by the parameters of the SAR model. According to this framework, scale and species group were the top predictors of the SAR shape, climatic factors (heterogeneity and median conditions) represented the second predictor level, and metacommunity properties (intraspecific spatial aggregation, γ-diversity, and species abundance distribution) the third predictor level. We calculated the SAR as a sample-based rarefaction curve using 60 streams within landscape windows (scales) in the United States, ranging from 160,000 to 6,760,000 km2 . First, we found that all models provided good fits (R2 ≥ 0.93), but the frequency of the best-fitting model was strongly dependent on organism, scale, and metacommunity properties. The Michaelis-Menten model was most common in fish, at the largest scales, and at the highest levels of intraspecific spatial aggregation. The power model was most frequent in diatoms and insects, at smaller scales, and in metacommunities with the lowest evenness. The logarithmic model fit best exclusively at the smallest scales and in species-poor metacommunities, primarily fish. Second, we tested our framework with the parameters of the most broadly used SAR model, the log-log form of the power model, using a structural equation model. This model supported our framework and revealed that the SAR slope was best predicted by scale- and organism-dependent metacommunity properties, particularly spatial aggregation, whereas the intercept responded most strongly to species group and γ-diversity. Future research should investigate from the perspective of our framework how shifts in metacommunity properties due to climate change may alter the SAR.
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Affiliation(s)
- Sophia I Passy
- Department of Biology, University of Texas at Arlington, Arlington, Texas, USA
| | - Joseph L Mruzek
- Forestry and Environmental Conservation Department, Clemson University, Clemson, South Carolina, USA
| | - William R Budnick
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan, USA
| | - Thibault Leboucher
- Laboratory for Continental Environments, National Scientific Research Center, University of Lorraine, Metz, France
| | | | - Jonathan M Chase
- Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Janne Soininen
- Department of Geosciences and Geography, University of Helsinki, Helsinki, Finland
| | - Eric R Sokol
- National Ecological Observatory Network (NEON), Battelle, Boulder, Colorado, USA
| | | | - Annika Vilmi
- Freshwater Centre, Finnish Environment Institute, Oulu, Finland
| | - Jianjun Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China
| | - Chad A Larson
- Washington State Department of Ecology, Environmental Assessment Program, Lacey, Washington, USA
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Tison-Rosebery J, Leboucher T, Archaimbault V, Belliard J, Carayon D, Ferréol M, Floury M, Jeliazkov A, Tales E, Villeneuve B, Passy SI. Decadal biodiversity trends in rivers reveal recent community rearrangements. Sci Total Environ 2022; 823:153431. [PMID: 35143793 DOI: 10.1016/j.scitotenv.2022.153431] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
While it is recognized that biodiversity currently declines at a global scale, we still have an incomplete understanding of local biodiversity trends under global change. To address this deficiency, we examined the recent decadal trends in water quality and biodiversity (taxonomic and functional) of key river organisms (diatoms, macroinvertebrates and fish) in France. We implemented regression, RLQ and fourth-corner analyses. Our results showed that nutrient loads tended to decrease, diatom richness tended to decline and macoinvertebrate richness tended to increase. The recovery of sensitive taxa in all three groups suggested a successful outcome of water quality management in France over the past decades. Our study further revealed consistent rearrangements within river communities, with a decrease in the ratio of planktonic to benthic diatoms, and corresponding functional changes in macroinvertebrate and fish trait composition, indicative of a trophic cascade in response to changes in environmental conditions.
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Affiliation(s)
| | | | - V Archaimbault
- University of Paris Saclay, INRAE, UR HYCAR, F-92160 Antony, France
| | - J Belliard
- University of Paris Saclay, INRAE, UR HYCAR, F-92160 Antony, France
| | - D Carayon
- INRAE, UR ETBX, F-33612 Cestas, France
| | - M Ferréol
- INRAE, UR RIVERLY, F-69625 Villeurbanne, France
| | - M Floury
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, F-69622, Villeurbanne, France
| | - A Jeliazkov
- University of Paris Saclay, INRAE, UR HYCAR, F-92160 Antony, France
| | - E Tales
- University of Paris Saclay, INRAE, UR HYCAR, F-92160 Antony, France
| | | | - S I Passy
- University of Texas at Arlington, Department of Biology, TX 76019, Arlington, USA
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Ribaudo C, Tison-Rosebery J, Eon M, Jan G, Bertrin V. Wind Exposure Regulates Water Oxygenation in Densely Vegetated Shallow Lakes. Plants 2021; 10:plants10071269. [PMID: 34206402 PMCID: PMC8309138 DOI: 10.3390/plants10071269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/14/2021] [Accepted: 06/18/2021] [Indexed: 11/16/2022]
Abstract
The presence of dense macrophyte canopies in shallow lakes locally generates thermal stratification and the buildup of labile organic matter, which in turn stimulate the biological oxygen demand. The occurrence of hypoxic conditions may, however, be buffered by strong wind episodes, which favor water mixing and reoxygenation. The present study aims at explicitly linking the wind action and water oxygenation within dense hydrophytes stands in shallow lakes. For this purpose, seasonal 24 h-cycle campaigns were carried out for dissolved gases and inorganic compounds measurements in vegetated stands of an oligo-mesotrophic shallow lake. Further, seasonal campaigns were carried out in a eutrophic shallow lake, at wind-sheltered and -exposed sites. Overall results showed that dissolved oxygen (DO) daily and seasonal patterns were greatly affected by the degree of wind exposure. The occurrence of frequent wind episodes favored the near-bottom water mixing, and likely facilitated mechanical oxygen supply from the atmosphere or from the pelagic zone, even during the maximum standing crop of plants (i.e., summer and autumn). A simple model linking wind exposure (Keddy Index) and water oxygenation allowed us to produce an output management map, which geographically identified wind-sheltered sites as the most subjected to critical periods of hypoxia.
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Affiliation(s)
- Cristina Ribaudo
- EA 4592 Géoressources & Environnement, F-33600 Pessac, France
- Correspondence:
| | - Juliette Tison-Rosebery
- INRAE, UR EABX, F-33612 Cestas, France; (J.T.-R.); (M.E.); (G.J.); (V.B.)
- Pôle R&D Écosystèmes Lacustres (ECLA), F-13100 Aix-en-Provence, France
| | - Mélissa Eon
- INRAE, UR EABX, F-33612 Cestas, France; (J.T.-R.); (M.E.); (G.J.); (V.B.)
| | - Gwilherm Jan
- INRAE, UR EABX, F-33612 Cestas, France; (J.T.-R.); (M.E.); (G.J.); (V.B.)
| | - Vincent Bertrin
- INRAE, UR EABX, F-33612 Cestas, France; (J.T.-R.); (M.E.); (G.J.); (V.B.)
- Pôle R&D Écosystèmes Lacustres (ECLA), F-13100 Aix-en-Provence, France
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Ribaudo C, Tison-Rosebery J, Buquet D, Jan G, Jamoneau A, Abril G, Anschutz P, Bertrin V. Corrigendum: Invasive Aquatic Plants as Ecosystem Engineers in an Oligo-Mesotrophic Shallow Lake. Front Plant Sci 2021; 12:656314. [PMID: 33763104 PMCID: PMC7983843 DOI: 10.3389/fpls.2021.656314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 02/16/2021] [Indexed: 06/12/2023]
Abstract
[This corrects the article DOI: 10.3389/fpls.2018.01781.].
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Affiliation(s)
- Cristina Ribaudo
- EA 4592 Géoressources et Environnement, ENSEGID, Pessac, France
- Irstea, UR EABX, Centre de Bordeaux, Cestas, France
| | | | - Damien Buquet
- CNRS UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux, Université de Bordeaux, Pessac, France
| | - Gwilherm Jan
- Irstea, UR EABX, Centre de Bordeaux, Cestas, France
| | | | - Gwenaël Abril
- CNRS UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux, Université de Bordeaux, Pessac, France
- Biologie des Organismes et Ecosystèmes Aquatiques, Muséum National d'Histoire Naturelle, Paris, France
- Programa de Geoquímica, Universidade Federal Fluminense, Niterói, Brazil
| | - Pierre Anschutz
- CNRS UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux, Université de Bordeaux, Pessac, France
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Abstract
BACKGROUND Microalgae play a key role in ecosystems and are widely used in ecological status assessment. Research focusing on such organisms is then well developed and essential. Anyway, approaches for a better comprehension of their metabolome's response towards anthropogenic stressors are only emerging. AIM OF REVIEW This review presents the biochemical responses of various microalgae species towards several contaminants including metals and chemicals as pesticides or industrial compounds. We aim to provide a comprehensive and up-to-date overview of analytical approaches deciphering anthropogenic contaminants impact on microalgae metabolome dynamics, in order to bring out relevant biochemical markers that could be used for risk assessment. KEY SCIENTIFIC CONCEPTS OF REVIEW Studies to date on ecotoxicological metabolomics on microalgae are highly heterogeneous in both analytical techniques and resulting metabolite identification. There is a real need for studies using complementary approaches to determine biomarkers usable for ecological risk assessment.
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Affiliation(s)
- Léa Gauthier
- IRSTEA, UR EABX, 50 Avenue de Verdun, 33612, Cestas Cedex, France.
| | | | - Soizic Morin
- IRSTEA, UR EABX, 50 Avenue de Verdun, 33612, Cestas Cedex, France
| | - Nicolas Mazzella
- IRSTEA, UR EABX, 50 Avenue de Verdun, 33612, Cestas Cedex, France
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Ribaudo C, Tison-Rosebery J, Buquet D, Jan G, Jamoneau A, Abril G, Anschutz P, Bertrin V. Invasive Aquatic Plants as Ecosystem Engineers in an Oligo-Mesotrophic Shallow Lake. Front Plant Sci 2018; 9:1781. [PMID: 30559756 PMCID: PMC6287530 DOI: 10.3389/fpls.2018.01781] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 11/15/2018] [Indexed: 05/30/2023]
Abstract
Exotic hydrophytes are often considered as aquatic weeds, especially when forming dense mats on an originally poorly colonized environment. While management efforts and research are focused on the control and on the impacts of aquatic weeds on biodiversity, their influence on shallow lakes' biogeochemical cycles is still unwell explored. The aim of the present study is to understand whether invasive aquatic plants may affect the biogeochemistry of shallow lakes and act as ecosystem engineers. We performed a multi-year investigation (2013-2015) of dissolved biogeochemical parameters in an oligo-mesotrophic shallow lake of south-west of France (Lacanau Lake), where wind-sheltered bays are colonized by dense mats of exotic Egeria densa Planch. and Lagarosiphon major (Ridl.) Moss. We collected seasonal samples at densely vegetated and plant-free areas, in order to extrapolate and quantify the role of the presence of invasive plants on the biogeochemistry, at the macrophyte stand scale and at the lake scale. Results revealed that elevated plant biomass triggers oxygen (O2), dissolved inorganic carbon (DIC) and nitrogen (DIN) stratification, with hypoxia events frequently occurring at the bottom of the water column. Within plants bed, elevated respiration rates generated important amounts of carbon dioxide (CO2), methane (CH4) and ammonium (NH4 +). The balance between benthic nutrients regeneration and fixation into biomass results strictly connected to the seasonal lifecycle of the plants. Indeed, during summer, DIC and DIN regenerated from the sediment are quickly fixed into plant biomass and sustain elevated growth rates. On the opposite, in spring and autumn, bacterial and plant respiration overcome nutrients fixation, resulting in an excess of nutrients in the water and in the increase of carbon emission toward the atmosphere. Our study suggests that aquatic weeds may perform as ecosystem engineers, by negatively affecting local oxygenation and by stimulating nutrients regeneration.
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Affiliation(s)
- Cristina Ribaudo
- EA 4592 Géoressources et Environnement, ENSEGID, Pessac, France
- Irstea, UR EABX, Centre de Bordeaux, Cestas, France
| | | | - Damien Buquet
- CNRS UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux, Université de Bordeaux, Pessac, France
| | - Gwilherm Jan
- Irstea, UR EABX, Centre de Bordeaux, Cestas, France
| | | | - Gwenaël Abril
- CNRS UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux, Université de Bordeaux, Pessac, France
- Biologie des Organismes et Ecosystèmes Aquatiques, Muséum National d’Histoire Naturelle, Paris, France
- Programa de Geoquímica, Universidade Federal Fluminense, Niterói, Brazil
| | - Pierre Anschutz
- CNRS UMR 5805 Environnements et Paléoenvironnements Océaniques et Continentaux, Université de Bordeaux, Pessac, France
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Passy SI, Larson CA, Jamoneau A, Budnick W, Heino J, Leboucher T, Tison-Rosebery J, Soininen J. Biogeographical Patterns of Species Richness and Abundance Distribution in Stream Diatoms Are Driven by Climate and Water Chemistry. Am Nat 2018; 192:605-617. [DOI: 10.1086/699830] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Lainé M, Morin S, Tison-Rosebery J. A multicompartment approach--diatoms, macrophytes, benthic macroinvertebrates and fish--to assess the impact of toxic industrial releases on a small French river. PLoS One 2014; 9:e102358. [PMID: 25019954 PMCID: PMC4096591 DOI: 10.1371/journal.pone.0102358] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/18/2014] [Indexed: 11/18/2022] Open
Abstract
The River Luzou flows through a sandy substrate in the South West of France. According to the results of two assessment surveys, the Water Agency appraised that this river may not achieve the good ecological status by 2015 as required by the Water Framework Directive (2000/60/EC). This ecosystem is impacted by industrial effluents (organic matter, metals and aromatic compounds). In order to assess and characterize the impact, this study aimed to combine a set of taxonomic and non-taxonomic metrics for diatoms, macrophytes, macroinvertebrates and fish along the up- to downstream gradient of the river. Diversity metrics, biological indices, biological and ecological traits were determined for the four biological quality elements (BQE). Various quantitative metrics (biomass estimates) were also calculated for diatom communities. The results were compared to physicochemical analysis. Biological measurements were more informative than physicochemical analysis, in the context of the study. Biological responses indicated both the contamination of water and its intensity. Diversity metrics and biological indices strongly decreased with pollution for all BQE but diatoms. Convergent trait selection with pollution was observed among BQE: reproduction, colonization strategies, or trophic regime were clearly modified at impaired sites. Taxon size and relation to the substrate diverged among biological compartments. Multiple anthropogenic pollution calls for alternate assessment methods of rivers' health. Our study exemplifies the fact that, in the case of complex contaminations, biological indicators can be more informative for environmental risk, than a wide screening of contaminants by chemical analysis alone. The combination of diverse biological compartments provided a refined diagnostic about the nature (general mode of action) and intensity of the contamination.
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Roubeix V, Fauvelle V, Tison-Rosebery J, Mazzella N, Coste M, Delmas F. Assessing the impact of chloroacetanilide herbicides and their metabolites on periphyton in the Leyre River (SW France) via short term growth inhibition tests on autochthonous diatoms. ACTA ACUST UNITED AC 2012; 14:1655-63. [PMID: 22588122 DOI: 10.1039/c2em10887a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Leyre River is the main tributary to the Bassin d'Arcachon lagoon. Herbicides belonging to the chloroacetanilide class have been found in the river (S-metolachlor and acetochlor) as well as some of their metabolites at higher concentrations. As the environmental toxicity of these molecules is not well known, ecotoxicological tests have been carried out on river periphyton at different levels of biological diversity: from the clone of one diatom species (Nitzschia nana) to the population of the same species (several clones) up to the multi-specific species community dominated by diatoms. Moreover, tests were performed on diatoms coming from an unpolluted upstream site and from a contaminated downstream site, in order to investigate possible tolerance acquisition to pollutants. The method consisted in measuring diatom growth inhibition at different doses of each substance from the increase of chlorophyll-a concentration after 4 days. It resulted that acetochlor was clearly more toxic than S-metolachlor at all levels of biological diversity. EC(50) values estimated from the tests suggest no effect of contaminants on diatom growth or biomass in the river. The toxicity of the metabolites appeared very low compared to that of their parent compounds. No difference in tolerance to the herbicides was demonstrated between summer diatom communities from the two sites in spite of different specific compositions. However, concerning the populations of N. nana isolated in winter following the highest herbicide concentrations in the river (about 0.5 μg L(-1)), the downstream population showed a higher tolerance to acetochlor but there was no co-tolerance to S-metolachlor. Thus, it appeared that acetochlor represents the highest toxic pressure on periphyton among the other contaminants in the Leyre River.
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