77 results on '"Argillier, C."'
Search Results
2. A user's guide to functional diversity indices
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Schleuter, D., Daufresne, M., Massol, F., and Argillier, C.
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- 2010
3. APPROCHE TYPOLOGIQUE DES PEUPLEMENTS PISCICOLES LACUSTRES FRANÇAIS. II. STRUCTURATION DES COMMUNAUTÉS DANS LES PLANS D’EAU D’ALTITUDE INFÉRIEURE À 1 500 M.
- Author
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ARGILLIER C., PRONIER O., IRZ P., and MOLINIER O.
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lake ,reservoir ,fish community ,environmental factors ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
En France, les communautés piscicoles lacustres ont fait l’objet de peu de travaux de recherche. Dans une première partie, nous avons présenté les résultats d’analyses des peuplements et des facteurs structurant ces peuplements dans les plans d’eau d’altitude supérieure à 1 500 m (ARGILLIER et al., 2002b). Les résultats d’une démarche analogue menée sur les réservoirs et les lacs naturels de plaine sont exposés ici. Que le milieu soit naturel ou artificiel, on observe une même succession des espèces caractéristiques des communautés le long d’un gradient amont-aval. Ainsi, aux truites et goujon succèdent vers l’aval le brochet et le gardon, puis la perche et enfin le sandre. La distinction entre les communautés des lacs naturels et des réservoirs se fait sur l’abondance de quelques espèces. Le corégone et l’omble chevalier sont plus abondants dans les lacs naturels que dans les retenues alors que l’inverse est observé pour le poisson-chat, le toxostome ou le barbeau fluviatile. Dans les lacs naturels, la nature des habitats littoraux semble expliquer certaines associations d’espèces. La prise en compte de nouveaux descripteurs des communautés et du milieu est envisagée pour la poursuite des analyses.
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- 2002
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4. APPROCHE TYPOLOGIQUE DES PEUPLEMENTS PISCICOLES LACUSTRES FRANÇAIS. I. LES COMMUNAUTÉS DES PLANS D’EAU D’ALTITUDE SUPÉRIEURE À 1 500 M.
- Author
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ARGILLIER C., PRONIER O., and IRZ P.
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lake ,reservoir ,fish community ,environmental factors ,Salmonids ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
Les liens entre les facteurs environnementaux et l’organisation des assemblages piscicoles lacustres ont été essentiellement étudiés sur le continent nord-américain. Nous présentons ici une analyse des communautés piscicoles des plans d’eau français. Les abondances relatives des espèces déterminées sur 98 sites ont été étudiées par analyses factorielles. Une distinction entre les communautés de poissons des plans d’eau « d’altitude » (> 1 500 m) et celles des retenues et lacs naturels de « plaine » (< 1 500 m) a été mise en évidence, conduisant à une analyse distincte de ces deux types de milieux. Les communautés piscicoles des plans d’eau de montagne sont peu diversifiées (2 espèces en moyenne) et peuvent schématiquement se caractériser par 5 types en fonction de l’espèce de Salmonidé dominante. L’abondance de ces espèces est peu corrélée aux descripteurs de milieu étudiés et reflète plutôt les pratiques de gestion.
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- 2002
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5. Development of a fish-based index to assess the eutrophication status of European lakes
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Argillier, C., Caussé, S., Gevrey, M., Pédron, S., De Bortoli, J., Brucet, S., Emmrich, M., Jeppesen, E., Lauridsen, T., Mehner, T., Olin, M., Rask, M., Volta, P., Winfield, I. J., Kelly, F., Krause, T., Palm, A., and Holmgren, K.
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- 2013
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6. The use of Split-Beam Echosounder for Fisheries Assessment in Reservoirs: Necessity for Validation
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Cadic, N., primary, Irz, P., additional, and Argillier, C., additional
- Published
- 2007
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7. Habitat use and preference of adult perch (Perca fluviatilis L.) in a deep reservoir: variations with seasons, water levels and individuals
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Westrelin, Samuel, Roy, R., Tissot-Rey, L., Bergès, L., Argillier, C., Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), PROFISH Technology S.A., Laboratoire National d’Hydraulique et Environnement (EDF R&D LNHE), EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF), Ecosystèmes montagnards (UR EMGR), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), and Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Aix Marseille Université (AMU)
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TELEMETRIE ,depth ,telemetry ,[SDE]Environmental Sciences ,seasonal migrations ,littoral zone ,ZONE LITTORALE ,ZABR ,migration ,acoustic telemetry ,PERCA FLUVIATILIS - Abstract
[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE [ADD1_IRSTEA]Systèmes aquatiques soumis à des pressions multiples; International audience; Perch Perca fluviatilis is a widespread predator in European reservoirs, frequent in open waters but also known to spend a lot of time in the littoral zones. To get insight into how adult perch used and selected their habitat in an environment subject to water level fluctuations, 21 perch were continuously tracked using acoustic telemetry over 2 years in the Bariousses reservoir (France). The different available habitats were characterized by depth classes and substrate types, presence of emerging trees, and presence of tree stumps in the littoral zone. We showed that perch habitat preferences were strongly dependent on the season, except for substrate type, and in line with their habitat use. Surprisingly we did not find any influence of the water level which however reduced the structural complexity of the littoral zone when lowering. In spring and summer, whatever the water level, we observed a strong preference for the littoral zone and complex habitats. In autumn and winter, perch migrated into deeper waters. However, the individual variability of the habitat preferences was quite high. This type of research helps to understand the spatial ecology of fish and provides useful guidance to hydromorphological restoration for fish populations.
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- 2018
8. Functional redundancy and sensitivity of fish assemblages in European rivers, lakes and estuarine ecosystems
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Teichert, N., Lepage, Mario, Sagouis, A., Borja, A., Chust, G., Ferreira, M.T., Pasquaud, Stéphanie, Schinegger, R., Segurado, P., Argillier, C., Ecosystèmes aquatiques et changements globaux (UR EABX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Marine Research Division, AZTI, Centro de Estudos Florestais, Universidade de Lisboa, Marine and Environmental Sciences Centre [Portugal] (MARE), Instituto Universitário de Ciências Psicológicas, Sociais e da Vida (ISPA), University of Natural Resources and Life Sciences [Wien] (BOKU), Université médicale de Vienne, Autriche, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Aix Marseille Université (AMU), Instituto Universitário de Ciências Psicológicas, Sociais e da Vida = University Institute of Psychological, Social and Life Sciences (ISPA), and Universität für Bodenkultur Wien = University of Natural Resources and Life [Vienne, Autriche] (BOKU)
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fish ,LAC ,faunistic assemblages ,ECOSYSTEME ,BIODIVERSITE ,humanities ,rivers ,estuaries ,ASSEMBLAGE FAUNISTIQUE ,COURS D'EAU ,lakes ,[SDE]Environmental Sciences ,ESTUAIRE ,ecosystems ,biodiversity ,POISSON - Abstract
[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE; International audience; The impact of species loss on ecosystems functioning depends on the amount of trait similarity between species, i.e. functional redundancy, but it is also influenced by the order in which species are lost. Here we investigated redundancy and sensitivity patterns across fish assemblages in lakes, rivers and estuaries. Several scenarios of species extinction were simulated to determine whether the loss ofvulnerable species (with high propensity of extinction when facing threats) causes a greater functional alteration than random extinction. Our results indicate that the functional redundancy tended toincrease with species richness in lakes and rivers, but not in estuaries. We demonstrated that i) in the three systems, some combinations of functional traits are supported by non-redundant species, ii) rarespecies in rivers and estuaries support singular functions not shared by dominant species, iii) the loss of vulnerable species can induce greater functional alteration in rivers than in lakes and estuaries. Overall, the functional structure of fish assemblages in rivers is weakly buffered against species extinction because vulnerable species support singular functions. More specifically, a hotspot of functionalsensitivity was highlighted in the Iberian Peninsula, which emphasizes the usefulness of quantitative criteria to determine conservation priorities.
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- 2017
9. Complementarity of two high-resolution spatiotemporal methods (hydroacoustics and acoustic telemetry) for assessing fish distribution in a reservoir
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Goulon, C., Westrelin, Samuel, Samedy, V., Roy, R., Guillard, J., Argillier, C., Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Aix Marseille Université (AMU), Ecosystèmes aquatiques et changements globaux (UR EABX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), and Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de la Recherche Agronomique (INRA)
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fish ,LAC ,DISTRIBUTION ,ECOSYSTEME ,economic distribution ,lakes ,[SDE]Environmental Sciences ,RECENSEMENT ACOUSTIQUE ,ecosystems ,POISSON - Abstract
International audience; The complementarity of two high-resolution spatiotemporal acoustic methods, telemetry and hydroacoustics, was evaluated during the same time window to obtain fish distribution in a canyon-shaped reservoir, the Bariousses Reservoir (France). These methods act at an individual scale for telemetry and a community scale for hydroacoustics. The temporal scales are also different: telemetry offers continuous and long-term monitoring while a "snapshot" view is given by hydroacoustics. Day and night hydroacoustic surveys were carried out in this reservoir, during a 24-hour period in spring, using vertical and near-surface horizontal beaming. During this time window, 11 adult fish (length: 22-57 cm) from three species (roach, perch, and pikeperch) were tracked by telemetry. Four metrics were calculated with data collected by application of the two methods: distances to the nearest bank, distances to the tributary, fish depth, and bottom depth at the location. The contrasting (distance to the nearest bank, bottom depth) or partially similar results (distance to the tributary, fish depth) can be explained by the limitations associated with each method. The results obtained with telemetry are very sensitive to the species composition and the size of the tagged fish. The number of fish located in the epibenthic areas of the reservoir can be underestimated by hydroacoustics. This preliminary case study highlights that these methods act in a complementary way and their simultaneous use can provide better information on fish spatial distribution.
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- 2017
10. Response of fish communities to multiple pressures: development of a total anthropogenic pressure intensity index
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Poikane, S., Ritterbusch, D., Argillier, C., Bialokoz, W., Blabolil, P., Breine, J., Jaarsma, N.G., Krause, T., Kubecka, J., Lauridsen, T.L., Nõges, P., Peirson, G., Virbickas, T., European Commission - Joint Research Centre [Ispra] (JRC), Institute of Inland Fisheries Potsdam-Sacrow, Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), aucun, Inland Fisheries Institute, Institute of Hydrobiology, Biology Centre of the Czech Academy of Science, Research Institute for Nature and Forest (INBO), Nico Jaarsma, EDF (EDF), Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences (EMU), Na Sádkách 7, 370 05 Č eské Bud ě jovice, Aarhus University [Aarhus], Environment Agency, Nature Research Centre, Institute of Inland Fisheries, Research Institute for Nature and Forest, and Estonian University of Life Science
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fish ,INDICATEUR BIOLOGIQUE ,LAC ,anthropogenic disturbance ,faunistic assemblages ,biological indicators ,ASSEMBLAGE FAUNISTIQUE ,european water framework directive ,lakes ,[SDE]Environmental Sciences ,DIRECTIVE CADRE EUROPEENNE SUR L'EAU ,MILIEU AQUATIQUE ,aquatic environment ,POISSON ,PERTURBATION ANTHROPIQUE - Abstract
International audience; Lakes in Europe are subject to multiple anthropogenic pressures, such as eutrophication, habitat degradation and alien species which are frequently inter-related. Therefore, effective assessment methods addressing multiple pressures are needed. In addition, these systems have to be harmonised (i.e. intercalibrated) to achieve common management objectives across Europe. Assessments of fish communities inform environmental policies on ecological conditions integrating the impacts of multiple pressures. However, the challenge is to ensure consistency in ecological assessments through time, across ecosystem types and across jurisdictional boundaries. To overcome the serious comparability issues between national assessment systems in Europe, a total anthropogenic pressure intensity (TAPI) index was developed as a weighed combination of most common pressures in European lakes that is validated against 10 national fish based water quality assessment systems using data from 556 lakes. Multi-pressure indices showed significantly higher correlations with fish indices than single-pressure indices. The best-performing index combines eutrophication, hydromorphological alterations and human use intensity of lakes. For specific lake types also biological pressures may constitute an important additional pressure. The best-performing index showed a strong correlation with eight fish-based national assessment systems. The developed best performing index can be used in lake management for assessing total anthropogenic pressure on lake ecosystems and creates a benchmark for comparison of fish assessments independent of fish community composition, size structure and fishing-gear. We argue that fish-based multiple-pressure assessment tools should be seen as complementary to single-pressure tools offering the major advantage of integrating direct and indirect effects of multiple pressures over large scales of space and time.
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- 2017
11. Seuils physico-chimiques dans la distribution des espèces de poissons dans les plans d'eau français
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Roubeix, V., Daufresne, M., Argillier, C., Dublon, J., Maire, A., Nicolas, D., Raymond, J.C., Danis, P.A., Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Aix Marseille Université (AMU)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), AFB-Irstea hydroécologie plans d ’ eau, Agence française pour la biodiversité, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Aix Marseille Université (AMU), and Pôle AFB-hydroécologie plans d'eau
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fish ,LAC ,QUALITE DE L'EAU ,species abundance ,water quality ,chemicophysical properties ,ecological indicators ,european water framework directive ,lakes ,GRADIENT ,[SDE]Environmental Sciences ,DIRECTIVE CADRE EUROPEENNE SUR L'EAU ,ABONDANCE D'ESPECE ,INDICATEUR ECOLOGIQUE ,PROPRIETE PHYSICOCHIMIQUE ,ComputingMilieux_MISCELLANEOUS ,POISSON - Abstract
[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE; International audience; The management of lakes requires the definition of physico-chemical thresholds to be used for ecosystem preservation or restoration. According to the European Water Framework Directive, the limits between physico-chemical quality classes must be set consistently with biological quality elements. One wayto dothis consists in analyzing the response of aquatic communitiesto environmental gradients across monitoring sites and in identifying ecological community thresholds, i.e. zones in the gradients where the species turnover is the highest. In this study, fish data from 196 lakes in France were considered to derive ecological thresholds using the multivariate method of gradient forest. The analysis was performed on 25 species and 36 environmental parameters. The results revealed the highest importance of maximal water temperature in the distribution offish species. Otherimportant parametersincluded geographical factors, dissolved organic carbon concentration and watertransparency, while nutrients appearedto havelowinfluence. In spite ofthe diversity of species responses to the gradients, community thresholds were detected in the gradients of the most important physico-chemical parameters and of total phosphorus and nitrate concentrations as well. The thresholds identifiedin such macroecological studymay highlight new patterns of species natural distribution andimprove niche characterization. Moreover, when factors that may be influenced by human activities are involved, the thresholds could be used to set environmental standards for lake preservation.; La gestion des plans d'eau nécessite la définition de seuils physico-chimiques pour la préservation ou la restauration des écosystèmes. Selon la Directive Cadre européenne sur l'Eau, les limites de classes de qualité physico-chimiques doivent être fixées en cohérence avec les éléments de qualité biologique.Une façon de faire consiste à analyser les réponses des communautés aquatiques aux gradients environnementaux formés par les sites de monitoring et d'identifier des seuils écologiques de communautés, c'est-à-dire des zones dans les gradients où le turnover des espèces est le plus important. Dans cette étude, les données de pêches provenant de 196 plans d'eau ont été considérées pour rechercher des seuils écologiques avec la méthode de gradient forest. L'analyse a porté sur 25 espèces avec 36 paramètres environnementaux. Les résultats ont révélé que la température maximale était le facteur le plus important dans la distribution des espèces de poissons. Les autres paramètres importants étaient les facteurs géographiques, la concentration en carbone organique dissous et la transparence de l'eau alors que les nutriments semblaient avoir peu d'influence. Malgré la diversité de réponses des espèces aux gradients, des seuils de communautés ont été détectés dans les gradients des paramètres physico-chimiques les plus importants ainsi que dans ceux des concentrations en phosphore total et en nitrates. Les seuils identifiés dans une telle étude macroécologique peuvent faire apparaître de nouveaux patrons de distribution naturelle des poissons et améliorer la caractérisation des niches spécifiques. De plus, quand des facteurs influencés par les activités humaines sont impliqués, ces seuils pourraient être utilisés pour fixer des limites pour la protection des plans d'eau.
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- 2017
12. Complementarity of two high-resolution spatiotemporal methods (hydroacoustics and acoustic telemetry) for assessing fish distribution in a reservoir
- Author
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Goulon, C., primary, Westrelin, S., additional, Samedy, V., additional, Roy, R., additional, Guillard, J., additional, and Argillier, C., additional
- Published
- 2018
- Full Text
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13. Environmental drivers of fish spatial distribution and activity in a reservoir with water level fluctuations
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Roy, R., primary, Tissot, L., additional, and Argillier, C., additional
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- 2018
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14. Évaluation du potentiel écologique des retenues de l'Europe centrale et de l'est à partir des peuplements de poissons
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Blabolil, P., Logez, Maxime, Ricard, D., Prchalova, M., Riha, M., Sagouis, A., Peterka, J., Kubecka, J., Argillier, C., Czech Academy of Sciences [Prague] (CAS), Hydrobiologie (UR HYAX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), and Czech Academy of Sciences [Prague] (ASCR)
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EUTROPHISATION ,FISH ,SPECIES ABUNDANCE ,EUTROPHICATION ,EUROPEAN WATER FRAMEWORK DIRECTIVE ,[SDE]Environmental Sciences ,ECOLOGIE DES COMMUNAUTES ,DIRECTIVE CADRE EUROPEENNE SUR L'EAU ,ABONDANCE D'ESPECE ,COMMUNITY ECOLOGY ,POISSON - Abstract
International audience; In this study we developed a novel methodology based on fish communities to assess the ecological potential of central European reservoirs. Using the hindcasting approach, our index predicts values that could be observed in the absence of pressures for each reservoir depending on their environmental characteristics. Fish data were collected from 144 French and Czech reservoirs between 2005 and 2013 by standardized benthic gillnet sampling and transformed to functional and taxonomical metrics. After all validation by multiple testing of models redundancy and pressure-response, the final index was composed of three metrics: total biomass of fish, abundance of invertivores/piscivores, and abundance of planktivorous fish. The index accurately identifies reservoirs that are lightly, moderately and heavily affected by eutrophication. In addition to French and Czech reservoirs, this index could be a useful tool for countries with few reservoirs and the basis for further collaborative studies.
- Published
- 2016
15. Quantification des réponses biotiques et abiotiques aux stress multiples en eaux douces, marines et souterraines
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Nõges, P., Argillier, C., Borja, Á., Garmendia, J.M., Hanganu, J., Kodes, V., Pletterbauer, F., Sagouis, A., Birk, S., Institute of Agricultural and Environmental Sciences, Centre for Limnology, Estonian University of Life Sciences, Hydrobiologie (UR HYAX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Marine Research Division, AZTI, Danube Delta, National Institute for Research and Development, Department of Water Quality, Czech Hydrometeorological Institute (CHMI), Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resource s and Life Sciences, and Universität Duisburg-Essen [Essen]
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LAKES ,EAU MARINE ,LAC ,STRESS ,PHYTOPLANCTON ,INVERTEBRE BENTHIQUE ,FRESHWATER ,FLORE AQUATIQUE ,FISH ,PHYTOPLANKTON ,[SDE]Environmental Sciences ,AQUATIC PLANTS ,EAU DOUCE ,BENTHIC INVERTEBRATE ,POISSON - Abstract
International audience; We reviewed 219 papers and built an inventory of 532 items of ecological evidence on multiple stressor impacts in rivers, lakes, transitional and coastal waters, as well as groundwaters. Our review revealed that, despite the existence of a huge conceptual knowledge base in aquatic ecology, few studies actually provide quantitative evidence on multi-stress effects. Nutrient stress was involved in 71% to 98% of multi-stress situations in the three types of surface water environments, and in 42% of those in groundwaters. However, their impact manifested differently along the groundwater-river-lake-transitional-coastal continuum, mainly determined by the different hydro-morphological features of these ecosystems. The reviewed papers addressed two-stressor combinations most frequently (42%), corresponding with the actual status-quo of pressures acting on European surface waters as reported by the Member States in the WISE WFD Database (EEA, 2015). Across all biological groups analysed, higher explanatory power of the stress-effect models was discernible for lakes under multi-stressor compared to single stressor conditions, but generally lower for coastal and transitional waters. Across all aquatic environments, the explanatory power of stress-effect models for fish increased when multi-stressor conditions were taken into account in the analysis, qualifying this organism group as a useful indicator of multi-stress effects. In contrast, the explanatory power of models using benthic flora decreased under conditions of multiple stress
- Published
- 2016
16. Next-generation monitoring of aquatic biodiversity using environmental DNA metabarcoding
- Author
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Valentini, A., Taberlet, P., Miaud, C., Civade, R., Herder, J., Thomsen, P.F., Bellemain, E., Besnard, A., Coissac, E., Boyer, F., Gaboriaud, C., Jean, P., Poulet, N., Roset, N., Copp, G.H., Geniez, P., Pont, D., Argillier, C., Baudoin, J.M., Peroux, T., Crivelli, A.J., Olivier, A., Acqueberge, M., Le Brun, M., Moller, P.R., Willerslev, E., Dejean, T., Centre d'Ingénierie Hydraulique [Savoie Technolac] (CIH-EDF), EDF (EDF), Laboratoire d'Ecologie Alpine (LECA), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Hydrosystèmes et Bioprocédés (UR HBAN), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), RAVON, Ravon, Centre for GeoGenetics, Natural History Museum of Denmark, Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU)-Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), Office national de l'eau et des milieux aquatiques (ONEMA), Ministère de l'écologie, du développement durable et de l'énergie, Centre for Environment, Fisheries and Aquaculture Science [Lowestoft] (CEFAS), Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Station Biologique de la Tour du Valat, Agence Centre-Ouest, Ecosphère, Laboratoire National d’Hydraulique et Environnement (EDF R&D LNHE), EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF), Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Université Joseph Fourier - Grenoble 1 (UJF)-Université Grenoble Alpes (UGA), Université Paul-Valéry - Montpellier 3 (UM3)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and Hydrosystèmes et bioprocédés (UR HBAN)
- Subjects
LAC ,aquatic fauna ,Monitoring ,ADN ,Environmental DNA ,FAUNE AQUATIQUE ,INVENTAIRE FAUNISTIQUE ,dna ,Amphibian ,ICHTYOLOGIE ,Fish ,Wildlife management ,ichthyology ,lakes ,Detection probability ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,animal population - Abstract
[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE; International audience; Global biodiversity in freshwater and the oceans is declining at high rates. Reliable tools for assessing and monitoring aquatic biodiversity, especially for rare and secretive species, are important for efficient and timely management. Recent advances in DNA sequencing have provided a new tool for species detection from DNA present in the environment. In this study, we tested whether an environmental DNA (eDNA) metabarcoding approach, using water samples, can be used for addressing significant questions in ecology and conservation. Two key aquatic vertebrate groups were targeted: amphibians and bony fish. The reliability of this method was cautiously validated in silico, invitro and insitu. When compared with traditional surveys or historical data, eDNA metabarcoding showed a much better detection probability overall. For amphibians, the detection probability with eDNA metabarcoding was 0.97 (CI=0.90-0.99) vs. 0.58 (CI=0.50-0.63) for traditional surveys. For fish, in 89% of the studied sites, the number of taxa detected using the eDNA metabarcoding approach was higher or identical to the number detected using traditional methods. We argue that the proposed DNA-based approach has the potential to become the next-generation tool for ecological studies and standardized biodiversity monitoring in a wide range of aquatic ecosystems. see also the Perspective by Hoffmann, Schubert and Calvignac-Spencer.
- Published
- 2015
17. Activity patterns of three piscivorous species in a reservoir studied with the Vemco Positioning System
- Author
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Roy, R., Westrelin, S., Tissot, L., De Oliveira, E., Argillier, C., Simulation et Traitement de l'information pour l'Exploitation des systèmes de Production (EDF R&D STEP), EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF), Hydrobiologie (UR HYAX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), and Irstea, Import Ws
- Subjects
[SDE] Environmental Sciences ,FISH ,TELEMETRIE ,[SDE]Environmental Sciences ,ECHOSOUNDING ,RESERVOIR ,DETECTION ACOUSTIQUE ,TELEMETRY ,POISSON - Abstract
144ème réunion annuelle de l'American Fisheries Society, Québec, CAN, 17-/08/2014 - 21/08/2014; International audience; Acoustic fixed telemetry monitoring allows to track aquatic animals over large areas during long periods Pikeperch (Sander lucioperca), Pike (Esox lucius) and Perch (Perca fluviatilis), 3 piscivorous species, are often together in the European reservoirs. Our objective was to study the activity patterns of these species and temporal variability of the activity according to environmental parameters in order to better understand how they live together.The 3 piscivorous species have been monitored in a French reservoir (80 ha) with the VEMCO Positioning System (VPS-40 hydrophones) during two years (2012-2013). First the evaluation of the performances of the VPS system was assessed to get the main characteristics of our tracking system Then, the activity of 60 individuals has been described with two metrics, minimum moved distance (daily and hourly) and home range (daily and seasonal). During the day, the diel activity patterns of the 3 species were clearly different but a high variability was observed between individuals Moreover, activity patterns were different between seasons but all species were active in winter Finally, the metrics used to describe the activity were correlated positively with water temperature for perch and pikeperch, but not for pike
- Published
- 2014
18. Détermination des substrats lacustres par hydroacoustique : application au suivit de qualité morphologique
- Author
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Poulain, T., Guillard, J., Argillier, C., Hydrobiologie (UR HYAX), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), ProdInra, Migration, and Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de la Recherche Agronomique (INRA)
- Subjects
[SDV] Life Sciences [q-bio] ,SUBSTRAT ,LAC ,ECOSYSTEME ,[SDV]Life Sciences [q-bio] ,[SDE]Environmental Sciences ,DIRECTIVE CADRE EUROPEENNE SUR L'EAU ,ACOUSTIQUE ,LAC LEMAN ,DETECTION ACOUSTIQUE ,SEDIMENT ,ECHOSONDEUR - Abstract
La diversité des écosystèmes lacustres s’explique en partie par la variété hydromorphologique des lacs ; la nature et la répartition du substrat qui tapisse leur fond sont des composantes de ce paramètre. C’est pour cela que la Directive Cadre sur l’Eau impose une description de la nature des sédiments des plans d’eau. Plus généralement, la répartition des substrats peut être considérée comme un facteur de structuration des espèces biologiques qu’abrite un lac. Des outils traditionnels comme l’utilisation d’une benne à sédiment ou d’une caméra subaquatique permettent de déterminer la nature des substrats de manière très ponctuelle mais ces techniques atteignent leurs limites lorsque tout un plan d’eau doit être caractérisé. Depuis les années 1980 des méthodes de caractérisation des sédiments utilisant des outils acoustiques qui permettent d’obtenir des informations en continu le long de parcours réalisés par un navire ont été développées et commercialisées. Pour l’application aux écosystèmes lacustres, de part leur mise en oeuvre, les systèmes utilisant les échosondeurs mono‐faisceau paraissent les plus appropriés. Ces appareils permettent de réaliser des cartes de la répartition des substrats à l’échelle du lac. Les informations pertinentes qui permettent de décrire un état biologique potentiel ou de définir un état initial peuvent être ainsi intégrer dans la mise en place des réseaux de suivi de la qualité des milieux. / The lake ecosystem diversity is explained, in part, by the hydromorphological diversity of lakes; nature and repartition of the substrata give information about this parameter. That is the reason why the European Water Framework imposes a substrata nature description of lakes. The substrata repartition could be considered as a factor of the biological structuring presents in lakes. Traditional tools like grab samplers or video cameras enable to determine the substrata nature but they are not appropriate for getting a high resolution description for an entire lake. From the beginning of the 80’s, acoustic devices specialized in seabed classification have been developed and commercialized. For lakebed surveys, systems using single beam sounders seem to be more appropriate; they enable to obtain maps of the lakebed at the whole lake scale. Information which describes a potential biological state can be used for the establishment of a quality monitoring.
- Published
- 2011
19. Classification de la nature des fonds lacustres par hydroacoustique
- Author
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Poulain, T., Argillier, C., Gevrey, M., Guillard, J., Hydrobiologie (UR HYAX), Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF), Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), CEMAGREF AIX EN PROVENCE HYAX, and INRA UMR CARRTEL THONON LES BAINS FRA
- Subjects
ETAT ECOLOGIQUE ,SALVELINUS ALPINUS ,ECOLOGICAL STATUS ,FOND LACUSTRE ,ECHOSONDEUR ,ACOUSTICS ,PLAN D'EAU ,EUROPEAN WATER FRAMEWORK DIRECTIVE ,[SDE]Environmental Sciences ,ACOUSTIQUE ,DIRECTIVE CADRE EUROPEENNE SUR L'EAU ,ECHOSOUNDING ,DETECTION ACOUSTIQUE ,LEMAN LAC - Abstract
National audience; Pour décrire l'état écologique des plans d'eau, la DCE (Directive Cadre sur l'Eau) impose la connaissance de leur état hydro-morphologique et notamment la description de la nature des substrats. Plusieurs outils acoustiques ont été développés depuis les années 1980 permettant de faire de la classification de la nature des fonds subaquatiques tel que les sidescan sonars, les sondeurs multi faisceaux et les échosondeurs mono faisceau. Ces techniques acoustiques permettent de mieux prendre en compte la dimension spatiale que les méthodes traditionnelles (caméra, bennes à sédiments,). En milieu lacustre, l'utilisation d'un échosondeur parait plus adapté (du point de vue des surfaces à échantillonner) et moins coûteux que les autres technologies. Sonar5-pro, logiciel d'analyse des signaux issus d'échosondeurs et spécialisé dans le calcul de biomasse de poissons, vient d'implémenter un module mettant à disposition les données qui permettent d'appliquer une méthode classique de détermination de la nature des fonds à partir de signaux acoustiques. Nous avons testé la faisabilité de la classification de la nature des fonds lacustres en utilisant ce module. Une première phase de détermination des paramètres d'acquisitions optimaux de l'onde émise par l'échosondeur a été réalisée. La base de données de référence nécessaire à la classification a ensuite été construite par vérification in situ de la nature des substrats. Le système a été utilisé dans le Léman pour établir une cartographie de la nature des substrats d'une omblière, zone de fraie de l'omble chevalier (Salvelinus alpinus). Les observations sur l'évolution temporelle des substrats de cette zone pourraient être mises en regard de la dynamique de l'espèce et de la nécessité de restaurer de telles zone
- Published
- 2010
20. Native and introduced fish species richness in French lakes : local and regional influences
- Author
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Irz, P., Argillier, C., and Oberdorff, Thierry
- Subjects
LAC ,ESPECE ALLOGENE ,POISSON D'EAU DOUCE ,LAC ARTIFICIEL ,COMPETITION INTERSPECIFIQUE ,ESPECE LOCALE ,INTRODUCTION D'ESPECES ,DIVERSITE SPECIFIQUE - Published
- 2003
21. Influence of site characteristics on fish community of patterns in French reservoirs
- Author
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Irz, Pascal, Laurent, A., Messad, Samir, Pronier, O., and Argillier, C.
- Subjects
M01 - Pêche et aquaculture - Considérations générales - Abstract
The objectives of this paper are to describe the fish assemblages in French reservoirs and to relate them to the sites' characteristics. The results of 43 fishing surveys were collected and completed with environmental descriptors. Fish assemblages differ between salmonids-dominated mountain sites and lowland ones. The latter show higher species diversity and a distinction between rheophilic- and limnophilic-type communities. This distinction can be explained by the reservoir age, location in the catchment and depth. The response of fish communities to these variables was investigated by canonical correspondence analysis. It shows that rheophilic species are typically abundant in upper basin, deep and recently created reservoirs. The fish community response to the aging process corresponds to an addition of lowland standing waters species and an extinction of the native riverine ones. The structuring role of the sites' depth, location and age is discussed, considering their relationship with the water body trophic status.
- Published
- 2002
22. Les peuplements piscicoles en lacs : assemblages types et niveaux d'eutrophisation
- Author
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Schlumberger, O., Cadic, N., Argillier, C., Proteau, J.P., Ressources ichtyologiques en plans d'eau (UR RIMO), and Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF)
- Subjects
EUTROPHISATION ,LAC ,ECHANTILLONNAGE STATISTIQUE ,ECHANTILLON ,[SDE]Environmental Sciences ,PEUPLEMENT ,PISCICULTURE ,ECOLOGIE ,POISSON - Abstract
L'analyse des résultats de pêches d'échantillonnage effectués sur vingt lacs naturels français (altitude < 1 500 m) mettent en évidence trois assemblages piscicoles. Le schéma d'évolution générale des plans d'eau (vieillissement) permet d'y replacer ces groupes de poissons et de les valider d'un point de vue écologique. Ainsi, les lacs oligo- à oligo-mésotrophes de la zone péri-alpine se situent dans l'ichtyorégion à Corégones (Coregonus sp.), ou bien se caractérisent par l'assemblage Alburnus alburnus - Gobio gobio avec Salmo trutta et Phoxinus phoxinus. L'assemblage Esox lucius - Scardinius erythrophtalmus - Tinca tinca caractériserait les plans d'eau naturels mésotrophes, moins eutrophisés (ou moins turbides) que ceux où se trouve l'assemblage Stizostedion lucioperca - Gymnocephalus cernuus. Du fait de la capacité d'adaptation des poissons aux variations de leur environnement, ces assemblages ne sont pas strictement indicateurs d'une valeur d'indice trophique déterminée, mais permettent de préciser "l'état écologique" de l'ichtyofaune d'un lac, tel que le prévoit la directive cadre européenne sur l'eau. / Statistical analyses have been applied to the results of fish sampling operations on twenty French natural lakes (altitude < 1500 m); three fish assemblages were evidenced and placed inside the general evolution scheme of lakes. The oligo- and oligo-mésotrophic lakes can be characterized by Coregonids (inside a Coregonid ichtyo-region) or by the association of Alburnus alburnus - Gobio gobio, with the presence of Phoxinus phoxinus and Salmo trutta. Into mesotrophic lakes, the assemblage Esox lucius - Scardinius erythrophtalmus - Tinca tinca could be considered as typical, and is replaced by Stizostedion lucioperca - Gymnocephalus cernuus with large Cyprinids (Cyprinus carpio, Abramis brama) in eutrophic lakes. Because of the capacity of adaptation of the fish, these assemblages do not correspond narrowly to trophic quality indices but are indicators of the "ichtyological condition" of a lake, as requested by the European Water Frame Directive.
- Published
- 2001
23. Development of a fish-based index to assess the eutrophication status of European lakes
- Author
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Argillier, C., primary, Caussé, S., additional, Gevrey, M., additional, Pédron, S., additional, De Bortoli, J., additional, Brucet, S., additional, Emmrich, M., additional, Jeppesen, E., additional, Lauridsen, T., additional, Mehner, T., additional, Olin, M., additional, Rask, M., additional, Volta, P., additional, Winfield, I. J., additional, Kelly, F., additional, Krause, T., additional, Palm, A., additional, and Holmgren, K., additional
- Published
- 2012
- Full Text
- View/download PDF
24. Selecting fish-based metrics responding to human pressures in French natural lakes and reservoirs: towards the development of a fish-based index (FBI) for French lakes
- Author
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Launois, L., primary, Veslot, J., additional, Irz, P., additional, and Argillier, C., additional
- Published
- 2010
- Full Text
- View/download PDF
25. Microgeographic genetic isolation in chub (Cyprinidae: Squalius cephalus) population of the Durance River: estimating fragmentation by dams
- Author
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Dehais, C., primary, Eudeline, R., additional, Berrebi, P., additional, and Argillier, C., additional
- Published
- 2010
- Full Text
- View/download PDF
26. Intérêts et limites d’une approche par type de milieu pour le développement d’un indice poisson lacustre français
- Author
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Launois, L., primary and Argillier, C., additional
- Published
- 2010
- Full Text
- View/download PDF
27. Stability and precision of the fish metrics obtained using CEN multi-mesh gillnets in natural and artificial lakes in France
- Author
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Deceliere-Vergès, C., primary, Argillier, C., additional, Lanoiselée, C., additional, De Bortoli, J., additional, and Guillard, J., additional
- Published
- 2009
- Full Text
- View/download PDF
28. Pikeperch habitat use within a canal network in spring
- Author
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Poulet, N., primary, Lek, S., additional, and Argillier, C., additional
- Published
- 2005
- Full Text
- View/download PDF
29. Contribution of native and non‐native species to fish communities in French reservoirs
- Author
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Irz, P., primary, Argillier, C., additional, and Proteau, J.‐P., additional
- Published
- 2004
- Full Text
- View/download PDF
30. Influence of site characteristics on fish community patterns in French reservoirs
- Author
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Irz, P, primary, Laurent, A, additional, Messad, S, additional, Pronier, O, additional, and Argillier, C, additional
- Published
- 2002
- Full Text
- View/download PDF
31. Fishery Management Practices in French Lakes
- Author
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Argillier, C., primary, Pronier, O., additional, and Changeux, T., additional
- Published
- 2002
- Full Text
- View/download PDF
32. APPROCHE TYPOLOGIQUE DES PEUPLEMENTS PISCICOLES LACUSTRES FRANÇAIS. I. LES COMMUNAUTÉS DES PLANS D’EAU D’ALTITUDE SUPÉRIEURE À 1 500 M.
- Author
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ARGILLIER, C., primary, PRONIER, O., additional, and IRZ, P., additional
- Published
- 2002
- Full Text
- View/download PDF
33. APPROCHE TYPOLOGIQUE DES PEUPLEMENTS PISCICOLES LACUSTRES FRANÇAIS. II. STRUCTURATION DES COMMUNAUTÉS DANS LES PLANS D’EAU D’ALTITUDE INFÉRIEURE À 1 500 M.
- Author
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ARGILLIER, C., primary, PRONIER, O., additional, IRZ, P., additional, and MOLINIER, O., additional
- Published
- 2002
- Full Text
- View/download PDF
34. Selecting fish-based metrics responding to human pressures in French natural lakes and reservoirs: towards the development of a fish-based index (FBI) for French lakes.
- Author
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Launois, L., Veslot, J., Irz, P., and Argillier, C.
- Subjects
EFFECT of human beings on fishes ,BIOINDICATORS ,ICHTHYOLOGY ,LAKES ,RESERVOIRS ,FISH ecology - Abstract
Launois L, Veslot J, Irz P, Argillier C. Selecting fish-based metrics responding to human pressures in French natural lakes and reservoirs: towards the development of a fish-based index (FBI) for French lakes. Ecology of Freshwater Fish 2011: 20: 120-132. © 2010 John Wiley & Sons A/S Fish-based indices of biotic integrity have been developed for many lotic systems but remain scarce for lakes. The goal of this study was to assess the responses of lentic fish assemblages to anthropogenic pressures when environmental variability was controlled for and to compare them between French natural lakes and reservoirs. Environmental features, catchment-scale anthropogenic descriptors and fish data were collected from 30 natural lakes and 59 reservoirs throughout France. Functional fish metrics were regressed against both anthropogenic variables and the natural environmental conditions. Our results show that fish assemblages are appropriate ecological indicators for both natural and artificial lakes. They underline the necessity to control for the environment when developing indices at broad geographical scales. The relevant metrics differ between natural lakes and reservoirs, which challenges the attempts to use natural systems as references to assess the ecological potential of artificial ones. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
35. Effet des conditions météorologiques et des fluctuations du niveau d'eau sur la force des cohortes de sandre (Sander lucioperca L.) et la perche (Perca fluviatilis L.) dans un réservoir français
- Author
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Argillier, C., Nicolas Poulet, Irz, P., Irstea Publications, Migration, Hydrobiologie - antenne de Montpellier (UR HYAX), and Centre national du machinisme agricole, du génie rural, des eaux et forêts (CEMAGREF)
- Subjects
[SDE] Environmental Sciences ,[SDE]Environmental Sciences ,FRANCE ,EGUZON - Abstract
The impacts of environmental factors on fish biological functions are well documented but the consequences of these relationships on population dynamics in natural hydrosystems are rarely assessed. We first studied the co-variations in the year-class strength (YCS) indices of the pikeperch (Sander lucioperca L.) and the perch (Perca fluviatilis L.) in a hydro-electric reservoir located in central France. Then, we analysed the relationship between the meteorological conditions during and after the spawning period, the water level fluctuations, and the YCS of these species. No co-variation was observed between the YCS of the two Percids. No significant relationship was measured between the reservoir level changes, the meteorological conditions and the pikeperch population dynamics. The summer temperature post spawning is the only variable positively correlated with the perch YCS. Our results suggest distinct regulation processes between the YCS of the perch and the pikeperch, L`impact des facteurs environnementaux sur les fonctions biologiques sont généralement bien décrits mais les conséquences en terme de dynamique des populations sont rarement évaluées. Nous avons étudié les co-variations de la force des cohortes (YCS) de sandre et de perche dans la retenue d`Eguzon (36). Ensuite nous avons analysés les relations entre les forces des cohortes et (i) les fluctuations du niveau d`eau, (ii) les conditions méteorologiques en période de ponte et (iii) les températures estivales et hivernales post-ponte. Aucune co-variation des YCS n`est observée. De plus aucun effet significatif du marnage n`est mesuré sur les YCS de ces espèces. Parmi les variables météorologiques, seule la température estivale est positivement corrélée à la YCS de la perche. Nos résultats suggèrent, pour ces deux Percidés, l`existance de différents processus de régulation de la dynamique des populations.
36. Measuring biodiversity vulnerability in French lakes - The IVCLA index.
- Author
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Silva Rocha B, Jamoneau A, Logez M, Laplace-Treyture C, Reynaud N, and Argillier C
- Subjects
- Animals, Humans, Biodiversity, Ecology, Water Quality, Fishes, Phytoplankton, Ecosystem, Lakes
- Abstract
Assessing the vulnerability of ecosystems to biodiversity loss has become increasingly crucial in conservation and ecology research. This study proposed a methodology for measuring lake vulnerability to biodiversity loss employing an established framework that combines three components. For this, we measured the resilience (functional redundancy) and sensitivity (an index considering three characteristics of rarity) components for fish and phytoplankton communities. We also measured the exposure component of the main stressors in lakes. We then combined the three components and calculated the vulnerability index (IVCLA) using data from 255 French lakes. We found that all lakes exhibited low levels of resilience, elevated sensitivity regarding average values for fish and phytoplankton groups, and medium exposure to stressors associated with human activities. In addition, there were some discrepancies in resilience and sensitivity patterns between fish and phytoplankton groups, emphasizing the importance of considering information from multiple biological groups when assessing ecosystem vulnerability. Hydrological alterations and low water quality were key stressors related to higher lake vulnerability. Most French lakes have been classified as exhibiting moderate vulnerability. It is crucial to emphasize the potential increase in exposure risks, which could lead to even higher vulnerability levels and, subsequently, biodiversity loss in the future. The IVCLA index offers several advantages, including integrating multiple taxa groups and stressors. We recommend incorporating additional data, such as the resilience and sensitivity of the entire food web, and considering temporal responses to stressors to improve accuracy and predictive power. The IVCLA was developed with the purpose of serving as an effective tool for guiding environmental managers in designing conservation strategies and making informed decisions for lake ecosystems., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
37. Temperature, productivity, and habitat characteristics collectively drive lake food web structure.
- Author
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Leclerc C, Reynaud N, Danis PA, Moatar F, Daufresne M, Argillier C, Usseglio-Polatera P, Verneaux V, Dedieu N, Frossard V, and Sentis A
- Subjects
- Lakes, Temperature, Biodiversity, Ecosystem, Food Chain
- Abstract
While many efforts have been devoted to understand variations in food web structure among terrestrial and aquatic ecosystems, the environmental factors influencing food web structure at large spatial scales remain hardly explored. Here, we compiled biodiversity inventories to infer food web structure of 67 French lakes using an allometric niche-based model and tested how environmental variables (temperature, productivity, and habitat) influence them. By applying a multivariate analysis on 20 metrics of food web topology, we found that food web structural variations are represented by two distinct complementary and independent structural descriptors. The first is related to the overall trophic diversity, whereas the second is related to the vertical structure. Interestingly, the trophic diversity descriptor was mostly explained by habitat size (26.7% of total deviance explained) and habitat complexity (20.1%) followed by productivity (dissolved organic carbon: 16.4%; nitrate: 9.1%) and thermal variations (10.7%). Regarding the vertical structure descriptor, it was mostly explained by water thermal seasonality (39.0% of total deviance explained) and habitat depth (31.9%) followed by habitat complexity (8.5%) and size (5.5%) as well as annual mean temperature (5.6%). Overall, we found that temperature, productivity, and habitat characteristics collectively shape lake food web structure. We also found that intermediate levels of productivity, high levels of temperature (mean and seasonality), as well as large habitats are associated with the largest and most complex food webs. Our findings, therefore, highlight the importance of focusing on these three components especially in the context of global change, as significant structural changes in aquatic food webs could be expected under increased temperature, pollution, and habitat alterations., (© 2023 The Authors. Global Change Biology published by John Wiley & Sons Ltd.)
- Published
- 2023
- Full Text
- View/download PDF
38. Bayesian inference of physicochemical quality elements of tropical lagoon Nokoué (Benin).
- Author
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Hounyèmè R, Logez M, Mama D, and Argillier C
- Subjects
- Benin, Bayes Theorem, Phosphorus, Ecosystem, Environmental Monitoring
- Abstract
In view of the very strong degradation of aquatic ecosystems, it is urgent to set up monitoring systems that are best able to report on the effects of the stresses they undergo. This is particularly true in developing countries, where specific and relevant quality standards and funding for monitoring programs are lacking. The objective of this study was to make a relevant and objective choice of physicochemical parameters informative of the main stressors occurring on African lakes and to identify their alteration thresholds. Based on statistical analyses of the relationship between several driving forces and the physicochemical parameters of the Nokoué lagoon, relevant physicochemical parameters were selected for its monitoring. An innovative method based on Bayesian statistical modeling was used. Eleven physicochemical parameters were selected for their response to at least one stressor and their threshold quality standards also established: Total Phosphorus (<4.5mg/L), Orthophosphates (<0.2mg/L), Nitrates (<0.5 mg/L), TKN (<1.85 mg/L), Dry Organic Matter (<5 mg/L), Dissolved Oxygen (>4 mg/L), BOD (<11.6 mg/L), Salinity (7.6 ‰), Water Temperature (<28.7 °C), pH (>6.2), and Transparency (>0.9 m). According to the System for the Evaluation of Coastal Water Quality, these thresholds correspond to "good to medium" suitability classes, except for total phosphorus. One of the original features of this study is the use of the bounds of the credibility interval of the fixed-effect coefficients as local weathering standards for the characterization of the physicochemical status of this anthropized African ecosystem., (© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
- Published
- 2023
- Full Text
- View/download PDF
39. Lake hydromorphology assessment in Europe: Where are we 20 years after the adoption of the Water Framework Directive?
- Author
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Argillier C, Carriere A, Wynne C, Hellsten S, Vartia K, and Poikane S
- Subjects
- Environmental Monitoring methods, Ecosystem, Europe, Surveys and Questionnaires, Lakes, Water
- Abstract
The characterization of lake hydromorphology is crucial to understand the dynamics of biodiversity. In Europe, it is also a regulatory requirement of the Water Framework Directive. However, according to the literature, few methods include this characterization. The aim of this study is to review the state of the art of the methods currently used or under development in European countries to assess lake hydromorphological status for the implementation of the WFD. Our analysis is based on responses to a questionnaire distributed to national experts on hydromorphology of the 28 countries implementing the WFD. Our results highlighted significant progress in the assessment of hydromorphological features and processes. Water level regime, through the range of water flow or existing water management, and structure of the shore zone through macrophytes and substrate characteristics or measurement of lateral connectivity, are the most frequently assessed features. Stratification, surface/groundwater connection and planform pattern are the lake features most frequently omitted from the methods. However, in most of the countries, the development of methods was still in progress to meet the WFD requirement. Definition of reference condition is a central component of all WFD compliant assessment tools but this is a challenge particularly in the assessment of hydromorphological alteration of reservoirs. Similarly, demonstrating strong links between hydromorphological indicators and biological quality elements remains a challenge with many knowledge gaps still evident. These results highlight the need for rapid collection of new environmental data and the need for conceptual and applied research to make methodological progress in assessing lake hydromorphology and ensuring habitat quality., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier B.V. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
40. Can size distributions of European lake fish communities be predicted by trophic positions of their fish species?
- Author
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van Dorst RM, Argillier C, Brucet S, Holmgren K, Volta P, Winfield IJ, and Mehner T
- Abstract
An organism's body size plays an important role in ecological interactions such as predator-prey relationships. As predators are typically larger than their prey, this often leads to a strong positive relationship between body size and trophic position in aquatic ecosystems. The distribution of body sizes in a community can thus be an indicator of the strengths of predator-prey interactions. The aim of this study was to gain more insight into the relationship between fish body size distribution and trophic position in a wide range of European lakes. We used quantile regression to examine the relationship between fish species' trophic position and their log-transformed maximum body mass for 48 fish species found in 235 European lakes. Subsequently, we examined whether the slopes of the continuous community size distributions, estimated by maximum likelihood, were predicted by trophic position, predator-prey mass ratio (PPMR), or abundance (number per unit effort) of fish communities in these lakes. We found a positive linear relationship between species' maximum body mass and average trophic position in fishes only for the 75% quantile, contrasting our expectation that species' trophic position systematically increases with maximum body mass for fish species in European lakes. Consequently, the size spectrum slope was not related to the average community trophic position, but there were negative effects of community PPMR and total fish abundance on the size spectrum slope. We conclude that predator-prey interactions likely do not contribute strongly to shaping community size distributions in these lakes., (© 2022 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
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- 2022
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41. Impacts of multiple stressors on freshwater biota across spatial scales and ecosystems.
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Birk S, Chapman D, Carvalho L, Spears BM, Andersen HE, Argillier C, Auer S, Baattrup-Pedersen A, Banin L, Beklioğlu M, Bondar-Kunze E, Borja A, Branco P, Bucak T, Buijse AD, Cardoso AC, Couture RM, Cremona F, de Zwart D, Feld CK, Ferreira MT, Feuchtmayr H, Gessner MO, Gieswein A, Globevnik L, Graeber D, Graf W, Gutiérrez-Cánovas C, Hanganu J, Işkın U, Järvinen M, Jeppesen E, Kotamäki N, Kuijper M, Lemm JU, Lu S, Solheim AL, Mischke U, Moe SJ, Nõges P, Nõges T, Ormerod SJ, Panagopoulos Y, Phillips G, Posthuma L, Pouso S, Prudhomme C, Rankinen K, Rasmussen JJ, Richardson J, Sagouis A, Santos JM, Schäfer RB, Schinegger R, Schmutz S, Schneider SC, Schülting L, Segurado P, Stefanidis K, Sures B, Thackeray SJ, Turunen J, Uyarra MC, Venohr M, von der Ohe PC, Willby N, and Hering D
- Subjects
- Biota, Europe, Rivers, Ecosystem, Fresh Water
- Abstract
Climate and land-use change drive a suite of stressors that shape ecosystems and interact to yield complex ecological responses (that is, additive, antagonistic and synergistic effects). We know little about the spatial scales relevant for the outcomes of such interactions and little about effect sizes. These knowledge gaps need to be filled to underpin future land management decisions or climate mitigation interventions for protecting and restoring freshwater ecosystems. This study combines data across scales from 33 mesocosm experiments with those from 14 river basins and 22 cross-basin studies in Europe, producing 174 combinations of paired-stressor effects on a biological response variable. Generalized linear models showed that only one of the two stressors had a significant effect in 39% of the analysed cases, 28% of the paired-stressor combinations resulted in additive effects and 33% resulted in interactive (antagonistic, synergistic, opposing or reversal) effects. For lakes, the frequencies of additive and interactive effects were similar for all spatial scales addressed, while for rivers these frequencies increased with scale. Nutrient enrichment was the overriding stressor for lakes, with effects generally exceeding those of secondary stressors. For rivers, the effects of nutrient enrichment were dependent on the specific stressor combination and biological response variable. These results vindicate the traditional focus of lake restoration and management on nutrient stress, while highlighting that river management requires more bespoke management solutions.
- Published
- 2020
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42. Otolith shape analysis and daily increment validation during ontogeny of larval and juvenile European chub Squalius cephalus.
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Bounket B, Gibert P, Gennotte V, Argillier C, Carrel G, Maire A, Logez M, and Morat F
- Subjects
- Age Factors, Analysis of Variance, Animals, Cluster Analysis, Cyprinidae anatomy & histology, Cyprinidae embryology, Discriminant Analysis, Female, Fourier Analysis, Larva growth & development, Linear Models, Male, Otolithic Membrane anatomy & histology, Principal Component Analysis, Cyprinidae growth & development, Otolithic Membrane growth & development
- Abstract
This assesses features of otoliths from laboratory-reared embryos, larvae and juvenile European chub Squalius cephalus from hatching to 180 days post-hatching (dph). We observed the development of the three pairs of otoliths (lapilli, sagittae and asterisci) and more precisely shape changes, as well as timing and deposition rate of increments of the lapilli. The lapilli and the sagittae were present at hatching, whereas the asterisci formed between 20 and 30 dph. The lapillus and sagitta shapes were round until 20 dph. From 60 dph the anterior and the posterior rostra of the sagittae were well developed, but very thin, making this otolith too fragile to manipulate for further studies of shape and validation of otolith increment deposition rate. The lapilli provided reliable age estimates for free embryos, larvae and juveniles up to 120 dph. However, caution should be taken when ageing fish older than 150 dph as an underestimation was noticeable. The regression of the number of otolith increments on age showed a slope and an intercept not significantly different from 1 and 0, respectively, which indicated that otolith growth increments were deposited on a daily basis, with the first microincrement occurring at hatching. Increment counts were consistent between three interpreters, indicating a consistent and reliable age estimate. This study validates that the otolith increment deposition rate can be used to assess hatching dates and daily growth of wild S. cephalus under 150 dph and in environments similar to the conditions used in this study., (© 2019 The Fisheries Society of the British Isles.)
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- 2019
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43. Functional redundancy and sensitivity of fish assemblages in European rivers, lakes and estuarine ecosystems.
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Teichert N, Lepage M, Sagouis A, Borja A, Chust G, Ferreira MT, Pasquaud S, Schinegger R, Segurado P, and Argillier C
- Subjects
- Animals, Conservation of Natural Resources methods, Estuaries, Europe, Extinction, Biological, Fresh Water, Lakes, Rivers, Biodiversity, Ecosystem, Fishes physiology
- Abstract
The impact of species loss on ecosystems functioning depends on the amount of trait similarity between species, i.e. functional redundancy, but it is also influenced by the order in which species are lost. Here we investigated redundancy and sensitivity patterns across fish assemblages in lakes, rivers and estuaries. Several scenarios of species extinction were simulated to determine whether the loss of vulnerable species (with high propensity of extinction when facing threats) causes a greater functional alteration than random extinction. Our results indicate that the functional redundancy tended to increase with species richness in lakes and rivers, but not in estuaries. We demonstrated that i) in the three systems, some combinations of functional traits are supported by non-redundant species, ii) rare species in rivers and estuaries support singular functions not shared by dominant species, iii) the loss of vulnerable species can induce greater functional alteration in rivers than in lakes and estuaries. Overall, the functional structure of fish assemblages in rivers is weakly buffered against species extinction because vulnerable species support singular functions. More specifically, a hotspot of functional sensitivity was highlighted in the Iberian Peninsula, which emphasizes the usefulness of quantitative criteria to determine conservation priorities.
- Published
- 2017
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44. Response of fish communities to multiple pressures: Development of a total anthropogenic pressure intensity index.
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Poikane S, Ritterbusch D, Argillier C, Białokoz W, Blabolil P, Breine J, Jaarsma NG, Krause T, Kubečka J, Lauridsen TL, Nõges P, Peirson G, and Virbickas T
- Subjects
- Animals, Europe, Eutrophication, Humans, Lakes, Ecosystem, Environmental Monitoring, Fishes
- Abstract
Lakes in Europe are subject to multiple anthropogenic pressures, such as eutrophication, habitat degradation and introduction of alien species, which are frequently inter-related. Therefore, effective assessment methods addressing multiple pressures are needed. In addition, these systems have to be harmonised (i.e. intercalibrated) to achieve common management objectives across Europe. Assessments of fish communities inform environmental policies on ecological conditions integrating the impacts of multiple pressures. However, the challenge is to ensure consistency in ecological assessments through time, across ecosystem types and across jurisdictional boundaries. To overcome the serious comparability issues between national assessment systems in Europe, a total anthropogenic pressure intensity (TAPI) index was developed as a weighted combination of the most common pressures in European lakes that is validated against 10 national fish-based water quality assessment systems using data from 556 lakes. Multi-pressure indices showed significantly higher correlations with fish indices than single-pressure indices. The best-performing index combines eutrophication, hydromorphological alterations and human use intensity of lakes. For specific lake types also biological pressures may constitute an important additional pressure. The best-performing index showed a strong correlation with eight national fish-based assessment systems. This index can be used in lake management for assessing total anthropogenic pressure on lake ecosystems and creates a benchmark for comparison of fish assessments independent of fish community composition, size structure and fishing-gear. We argue that fish-based multiple-pressure assessment tools should be seen as complementary to single-pressure tools offering the major advantage of integrating direct and indirect effects of multiple pressures over large scales of space and time., (Copyright © 2017 The Authors. Published by Elsevier B.V. All rights reserved.)
- Published
- 2017
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45. Next-generation monitoring of aquatic biodiversity using environmental DNA metabarcoding.
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Valentini A, Taberlet P, Miaud C, Civade R, Herder J, Thomsen PF, Bellemain E, Besnard A, Coissac E, Boyer F, Gaboriaud C, Jean P, Poulet N, Roset N, Copp GH, Geniez P, Pont D, Argillier C, Baudoin JM, Peroux T, Crivelli AJ, Olivier A, Acqueberge M, Le Brun M, Møller PR, Willerslev E, and Dejean T
- Subjects
- Amphibians genetics, Animals, DNA Primers, DNA, Mitochondrial genetics, Ecosystem, Environmental Monitoring, Fishes genetics, Fresh Water, Oceans and Seas, Amphibians classification, Biodiversity, DNA Barcoding, Taxonomic methods, Fishes classification
- Abstract
Global biodiversity in freshwater and the oceans is declining at high rates. Reliable tools for assessing and monitoring aquatic biodiversity, especially for rare and secretive species, are important for efficient and timely management. Recent advances in DNA sequencing have provided a new tool for species detection from DNA present in the environment. In this study, we tested whether an environmental DNA (eDNA) metabarcoding approach, using water samples, can be used for addressing significant questions in ecology and conservation. Two key aquatic vertebrate groups were targeted: amphibians and bony fish. The reliability of this method was cautiously validated in silico, in vitro and in situ. When compared with traditional surveys or historical data, eDNA metabarcoding showed a much better detection probability overall. For amphibians, the detection probability with eDNA metabarcoding was 0.97 (CI = 0.90-0.99) vs. 0.58 (CI = 0.50-0.63) for traditional surveys. For fish, in 89% of the studied sites, the number of taxa detected using the eDNA metabarcoding approach was higher or identical to the number detected using traditional methods. We argue that the proposed DNA-based approach has the potential to become the next-generation tool for ecological studies and standardized biodiversity monitoring in a wide range of aquatic ecosystems., (© 2015 John Wiley & Sons Ltd.)
- Published
- 2016
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46. Quantified biotic and abiotic responses to multiple stress in freshwater, marine and ground waters.
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Nõges P, Argillier C, Borja Á, Garmendia JM, Hanganu J, Kodeš V, Pletterbauer F, Sagouis A, and Birk S
- Subjects
- Animals, Ecology, Models, Theoretical, Water Pollution statistics & numerical data, Environmental Monitoring, Fresh Water chemistry, Groundwater chemistry, Seawater chemistry, Water Pollution analysis
- Abstract
We reviewed 219 papers and built an inventory of 532 items of ecological evidence on multiple stressor impacts in rivers, lakes, transitional and coastal waters, as well as groundwaters. Our review revealed that, despite the existence of a huge conceptual knowledge base in aquatic ecology, few studies actually provide quantitative evidence on multi-stress effects. Nutrient stress was involved in 71% to 98% of multi-stress situations in the three types of surface water environments, and in 42% of those in groundwaters. However, their impact manifested differently along the groundwater-river-lake-transitional-coastal continuum, mainly determined by the different hydro-morphological features of these ecosystems. The reviewed papers addressed two-stressor combinations most frequently (42%), corresponding with the actual status-quo of pressures acting on European surface waters as reported by the Member States in the WISE WFD Database (EEA, 2015). Across all biological groups analysed, higher explanatory power of the stress-effect models was discernible for lakes under multi-stressor compared to single stressor conditions, but generally lower for coastal and transitional waters. Across all aquatic environments, the explanatory power of stress-effect models for fish increased when multi-stressor conditions were taken into account in the analysis, qualifying this organism group as a useful indicator of multi-stress effects. In contrast, the explanatory power of models using benthic flora decreased under conditions of multiple stress., (Copyright © 2015 Elsevier B.V. All rights reserved.)
- Published
- 2016
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47. Managing aquatic ecosystems and water resources under multiple stress--an introduction to the MARS project.
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Hering D, Carvalho L, Argillier C, Beklioglu M, Borja A, Cardoso AC, Duel H, Ferreira T, Globevnik L, Hanganu J, Hellsten S, Jeppesen E, Kodeš V, Solheim AL, Nõges T, Ormerod S, Panagopoulos Y, Schmutz S, Venohr M, and Birk S
- Subjects
- Climate Change, Environmental Monitoring, Environmental Policy, Models, Theoretical, Conservation of Natural Resources methods, Ecosystem, Water Resources, Water Supply
- Abstract
Water resources globally are affected by a complex mixture of stressors resulting from a range of drivers, including urban and agricultural land use, hydropower generation and climate change. Understanding how stressors interfere and impact upon ecological status and ecosystem services is essential for developing effective River Basin Management Plans and shaping future environmental policy. This paper details the nature of these problems for Europe's water resources and the need to find solutions at a range of spatial scales. In terms of the latter, we describe the aims and approaches of the EU-funded project MARS (Managing Aquatic ecosystems and water Resources under multiple Stress) and the conceptual and analytical framework that it is adopting to provide this knowledge, understanding and tools needed to address multiple stressors. MARS is operating at three scales: At the water body scale, the mechanistic understanding of stressor interactions and their impact upon water resources, ecological status and ecosystem services will be examined through multi-factorial experiments and the analysis of long time-series. At the river basin scale, modelling and empirical approaches will be adopted to characterise relationships between multiple stressors and ecological responses, functions, services and water resources. The effects of future land use and mitigation scenarios in 16 European river basins will be assessed. At the European scale, large-scale spatial analysis will be carried out to identify the relationships amongst stress intensity, ecological status and service provision, with a special focus on large transboundary rivers, lakes and fish. The project will support managers and policy makers in the practical implementation of the Water Framework Directive (WFD), of related legislation and of the Blueprint to Safeguard Europe's Water Resources by advising the 3rd River Basin Management Planning cycle, the revision of the WFD and by developing new tools for diagnosing and predicting multiple stressors., (Copyright © 2014. Published by Elsevier B.V.)
- Published
- 2015
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48. Assessing the ecological status in the context of the European Water Framework Directive: where do we go now?
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Reyjol Y, Argillier C, Bonne W, Borja A, Buijse AD, Cardoso AC, Daufresne M, Kernan M, Ferreira MT, Poikane S, Prat N, Solheim AL, Stroffek S, Usseglio-Polatera P, Villeneuve B, and van de Bund W
- Subjects
- Biodiversity, Conservation of Natural Resources methods, Ecosystem, Environmental Monitoring, Europe, Water Pollution, Conservation of Natural Resources legislation & jurisprudence, Ecology, Environmental Policy
- Abstract
The Water Framework Directive (WFD) is now well established as the key management imperative in river basins across Europe. However, there remain significant concerns with the way WFD is implemented and there is now a need for water managers and scientists to communicate better in order to find solutions to these concerns. To address this, a Science-Policy Interface (SPI) activity was launched in 2010 led by Directorate-General for Research and Innovation and Onema (the French national agency for water and aquatic ecosystems), which provided an interactive forum to connect scientists and WFD end-users. One major aim of the SPI activity was to establish a list of the most crucial research and development needs for enhancing WFD implementation. This paper synthesises the recommendations from this event highlighting 10 priority issues relating to ecological status. For lakes, temporary streams and transitional and coastal waters, WFD implementation still suffers from a lack of WFD-compliant bioassessment methods. For rivers, special attention is required to assess the ecological impacts of hydromorphological alterations on biological communities, notably those affecting river continuity and riparian covering. Spatial extrapolation tools are needed in order to evaluate ecological status for water bodies for which no data are available. The need for more functional bioassessment tools as complements to usual WFD-compliant tools, and to connect clearly good ecological state, biodiversity and ecosystem services when implementing WFD were also identified as crucial issues., (Copyright © 2014 Elsevier B.V. All rights reserved.)
- Published
- 2014
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49. A new freshwater biodiversity indicator based on fish community assemblages.
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Clavel J, Poulet N, Porcher E, Blanchet S, Grenouillet G, Pavoine S, Biton A, Seon-Massin N, Argillier C, Daufresne M, Teillac-Deschamps P, and Julliard R
- Subjects
- Animals, Databases, Factual, Datasets as Topic, Ecosystem, France, Humans, Spatio-Temporal Analysis, Biodiversity, Fishes, Fresh Water
- Abstract
Biodiversity has reached a critical state. In this context, stakeholders need indicators that both provide a synthetic view of the state of biodiversity and can be used as communication tools. Using river fishes as model, we developed community indicators that aim at integrating various components of biodiversity including interactions between species and ultimately the processes influencing ecosystem functions. We developed indices at the species level based on (i) the concept of specialization directly linked to the niche theory and (ii) the concept of originality measuring the overall degree of differences between a species and all other species in the same clade. Five major types of originality indices, based on phylogeny, habitat-linked and diet-linked morphology, life history traits, and ecological niche were analyzed. In a second step, we tested the relationship between all biodiversity indices and land use as a proxy of human pressures. Fish communities showed no significant temporal trend for most of these indices, but both originality indices based on diet- and habitat- linked morphology showed a significant increase through time. From a spatial point of view, all indices clearly singled out Corsica Island as having higher average originality and specialization. Finally, we observed that the originality index based on niche traits might be used as an informative biodiversity indicator because we showed it is sensitive to different land use classes along a landscape artificialization gradient. Moreover, its response remained unchanged over two other land use classifications at the global scale and also at the regional scale.
- Published
- 2013
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50. Defining chlorophyll-a reference conditions in European lakes.
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Poikāne S, Alves MH, Argillier C, van den Berg M, Buzzi F, Hoehn E, de Hoyos C, Karottki I, Laplace-Treyture C, Solheim AL, Ortiz-Casas J, Ott I, Phillips G, Pilke A, Pádua J, Remec-Rekar S, Riedmüller U, Schaumburg J, Serrano ML, Soszka H, Tierney D, Urbanic G, and Wolfram G
- Subjects
- Environmental Monitoring methods, Europe, Eutrophication, Phytoplankton, Reference Values, Chlorophyll, Fresh Water
- Abstract
The concept of "reference conditions" describes the benchmark against which current conditions are compared when assessing the status of water bodies. In this paper we focus on the establishment of reference conditions for European lakes according to a phytoplankton biomass indicator--the concentration of chlorophyll-a. A mostly spatial approach (selection of existing lakes with no or minor human impact) was used to set the reference conditions for chlorophyll-a values, supplemented by historical data, paleolimnological investigations and modelling. The work resulted in definition of reference conditions and the boundary between "high" and "good" status for 15 main lake types and five ecoregions of Europe: Alpine, Atlantic, Central/Baltic, Mediterranean, and Northern. Additionally, empirical models were developed for estimating site-specific reference chlorophyll-a concentrations from a set of potential predictor variables. The results were recently formulated into the EU legislation, marking the first attempt in international water policy to move from chemical quality standards to ecological quality targets.
- Published
- 2010
- Full Text
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