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  1. Article ; Online: Species invasiveness and community invasibility of North American freshwater fish fauna revealed via trait-based analysis.

    Su, Guohuan / Mertel, Adam / Brosse, Sébastien / Calabrese, Justin M

    Nature communications

    2023  Volume 14, Issue 1, Page(s) 2332

    Abstract: While biological invasions are recognized as a major threat to global biodiversity, determining non-native species' abilities to establish in new areas (species invasiveness) and the vulnerability of those areas to invasions (community invasibility) is ... ...

    Abstract While biological invasions are recognized as a major threat to global biodiversity, determining non-native species' abilities to establish in new areas (species invasiveness) and the vulnerability of those areas to invasions (community invasibility) is challenging. Here, we use trait-based analysis to profile invasive species and quantify the community invasibility for >1,800 North American freshwater fish communities. We show that, in addition to effects attributed to propagule pressure caused by human intervention, species with higher fecundity, longer lifespan and larger size tend to be more invasive. Community invasibility peaks when the functional distance among native species was high, leaving unoccupied functional space for the establishment of potential invaders. Our findings illustrate how the functional traits of non-native species determining their invasiveness, and the functional characteristics of the invaded community determining its invasibility, may be identified. Considering those two determinants together will enable better predictions of invasions.
    MeSH term(s) Animals ; Humans ; Ecosystem ; Biodiversity ; Introduced Species ; Fresh Water ; Fishes ; North America
    Language English
    Publishing date 2023-04-22
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-023-38107-2
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  2. Article ; Online: Land use outweighs other stressors in declining fish biodiversity in lakes of Eastern China during the 1980s-2010s

    Liu, Han / Brosse, Sébastien / Qu, Xiao / Xia, Wentong / Li, Xiuqi / Chen, Yushun

    Ecological Indicators. 2023 Aug., v. 152 p.110390-

    2023  

    Abstract: Understanding patterns and driving factors of freshwater fish biodiversity in metacommunities is essential for biological conservation but rarely studied in regions experiencing rapid land use changes. We examined changes of both alpha and beta fish ... ...

    Abstract Understanding patterns and driving factors of freshwater fish biodiversity in metacommunities is essential for biological conservation but rarely studied in regions experiencing rapid land use changes. We examined changes of both alpha and beta fish diversities in taxonomic, functional, and phylogenetic facets during the 1980 s to 2010 s, and quantified contributions from natural and human drivers in lakes located in China's fastest economic development region. Results showed that almost all indices of alpha and beta diversity decreased through time. For alpha diversity, taxonomic and functional richness declined by 13 to 15%. Rheophilic and piscivorous fish species declined by 50 and 36%, respectively. For beta diversity, the decline of overall functional (-31%) diversity was greater than taxonomic (-17%) and phylogenetic (-19%) diversity. The decline of multiple facets of beta diversity indicated that fish communities in these lakes have homogenized through time. Land use (i.e., increased urban land and aquaculture ponds), hydrology (i.e., increased water level), climate (i.e., increased air temperature), and fishing (i.e., increased lake fishery catch) factors all made significant contributions to both alpha and beta fish diversity decline in multiple facets. The overall contribution from land use to the decline of multidimensional fish diversity was greater than those of other stressors. While attention should be given to both local human disturbance and regional climate factors, in regions experiencing rapid economic development and land use changes, local disturbances should be considered as a priority in biodiversity management plans.
    Keywords air temperature ; anthropogenic activities ; aquaculture ; climate ; economic development ; fisheries ; freshwater fish ; humans ; hydrology ; lakes ; land use ; phylogeny ; piscivorous fish ; rheophilic species ; species diversity ; China ; Fish assemblage ; Alpha and beta diversity ; Multifaceted diversity ; Human disturbance ; Climate change ; Homogenization
    Language English
    Dates of publication 2023-08
    Publishing place Elsevier Ltd
    Document type Article ; Online
    Note Use and reproduction
    ZDB-ID 2036774-0
    ISSN 1872-7034 ; 1470-160X
    ISSN (online) 1872-7034
    ISSN 1470-160X
    DOI 10.1016/j.ecolind.2023.110390
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  3. Article ; Online: Deforestation strengthens environmental filtering and competitive exclusion in Neotropical streams and rivers.

    Cantera, Isabel / Jézéquel, Céline / Dejean, Tony / Murienne, Jérôme / Vigouroux, Régis / Valentini, Alice / Brosse, Sébastien

    Proceedings. Biological sciences

    2023  Volume 290, Issue 2006, Page(s) 20231130

    Abstract: Understanding how anthropization impacts the assembly of species onto communities is pivotal to go beyond the observation of biodiversity changes and reveal how disturbances affect the environmental and biotic processes shaping biodiversity. Here, we ... ...

    Abstract Understanding how anthropization impacts the assembly of species onto communities is pivotal to go beyond the observation of biodiversity changes and reveal how disturbances affect the environmental and biotic processes shaping biodiversity. Here, we propose a simple framework to measure the assembly processes underpinning functional convergence/divergence patterns. We applied this framework to northern Amazonian fish communities inventoried using environmental DNA in 35 stream sites and 64 river sites. We found that the harsh and unstable environmental conditions characterizing streams conveyed communities towards functional convergence, by filtering traits related to food acquisition and, to a lower extent, dispersal. Such environmental filtering also strengthened competition by excluding species having less competitive food acquisition traits. Instead, random species assembly was more marked in river communities, which may be explained by the downstream position of rivers facilitating the dispersion of species. Although fish assembly rules differed between streams and river fish communities, anthropogenic disturbances reduced functional divergence in both ecosystems, with a reinforcement of both environmental filtering and weaker competitor exclusion. This may explain the substantial biodiversity alterations observed under slight deforestation levels in Neotropical freshwater ecosystems and underlines their vulnerability to anthropic disturbances that not only affect species persistence but also modify community assembly rules.
    MeSH term(s) Animals ; Conservation of Natural Resources ; Ecosystem ; Rivers ; Fresh Water ; Anthropogenic Effects
    Language English
    Publishing date 2023-09-13
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 209242-6
    ISSN 1471-2954 ; 0080-4649 ; 0962-8452 ; 0950-1193
    ISSN (online) 1471-2954
    ISSN 0080-4649 ; 0962-8452 ; 0950-1193
    DOI 10.1098/rspb.2023.1130
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  4. Article ; Online: Environmental DNA reveals a mismatch between diversity facets of Amazonian fishes in response to contrasting geographical, environmental and anthropogenic effects

    Coutant, Opale / Jézéquel, Céline / Mokany, Karel / Cantera, Isabel / Covain, Raphaël / Valentini, Alice / Dejean, Tony / Brosse, Sébastien / Murienne, Jérôme

    Global Change Biology. 2023 Apr., v. 29, no. 7 p.1741-1758

    2023  

    Abstract: Freshwater ecosystems are among the most endangered ecosystem in the world. Understanding how human activities affect these ecosystems requires disentangling and quantifying the contribution of the factors driving community assembly. While it has been ... ...

    Abstract Freshwater ecosystems are among the most endangered ecosystem in the world. Understanding how human activities affect these ecosystems requires disentangling and quantifying the contribution of the factors driving community assembly. While it has been largely studied in temperate freshwaters, tropical ecosystems remain challenging to study due to the high species richness and the lack of knowledge on species distribution. Here, the use of eDNA‐based fish inventories combined to a community‐level modelling approach allowed depicting of assembly rules and quantifying the relative contribution of geographic, environmental and anthropic factors to fish assembly. We then used the model predictions to map spatial biodiversity and assess the representativity of sites surveyed in French Guiana within the EU Water Framework Directive (WFD) and highlighted areas that should host unique freshwater fish assemblages. We demonstrated a mismatch between the taxonomic and functional diversity. Taxonomic assemblages between but also within basins were mainly the results of dispersal limitation resulting from basin isolation and natural river barriers. Contrastingly, functional assemblages were ruled by environmental and anthropic factors. The regional mapping of fish diversity indicated that the sites surveyed within the EU WFD had a better representativity of the regional functional diversity than taxonomic diversity. Importantly, we also showed that the assemblages expected to be the most altered by anthropic factors were the most poorly represented in terms of functional diversity in the surveyed sites. The predictions of unique functional and taxonomic assemblages could, therefore, guide the establishment of new survey sites to increase fish diversity representativity and improve this monitoring program.
    Keywords basins ; endangered ecosystems ; environmental DNA ; freshwater ; freshwater fish ; functional diversity ; geographical distribution ; global change ; humans ; rivers ; species richness ; surveys ; French Guiana
    Language English
    Dates of publication 2023-04
    Size p. 1741-1758.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 1281439-8
    ISSN 1365-2486 ; 1354-1013
    ISSN (online) 1365-2486
    ISSN 1354-1013
    DOI 10.1111/gcb.16533
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  5. Article: Contemporary environment and historical legacy explain functional diversity of freshwater fishes in the world rivers

    Su, Guohuan / Tedesco, Pablo A. / Toussaint, Aurèle / Villéger, Sébastien / Brosse, Sébastien

    Global ecology and biogeography. 2022 Apr., v. 31, no. 4

    2022  

    Abstract: AIM: Regional taxonomic diversity (species richness) is strongly influenced by a joint effect of the current processes (habitat and energy availability) and historical legacies (past climate and geography), but it is still unclear how those historical ... ...

    Abstract AIM: Regional taxonomic diversity (species richness) is strongly influenced by a joint effect of the current processes (habitat and energy availability) and historical legacies (past climate and geography), but it is still unclear how those historical and current environmental drivers have shaped the functional diversity of species assemblages. MAJOR TAXA STUDIED: Freshwater fish. LOCATION: Global. TIME PERIOD: 1960s–2000s. METHODS: We combined the spatial occurrences over 2,400 river basins world‐wide and the functional traits measured on 10,682 freshwater fish species to quantify the relative role of the habitat, climate and historical processes on the current global fish functional diversity. To avoid any correlation between taxonomic diversity and functional diversity, we controlled for differences in the number of species (species richness) between rivers. Functional diversity was considered through three complementary facets: functional richness, functional dispersion and functional identity. RESULTS: The habitat‐related variables explained most of the gradient in functional richness, verifying the habitat size–diversity hypothesis. In contrast, the historical climate–geography legacies markedly imprinted the functional dispersion and functional identity patterns, leading to a balanced influence of the current and historical processes. Indeed, the distribution of morphological traits related to fish dispersal was explained largely by the glaciation events during the Quaternary, leading to strong latitudinal gradients. MAIN CONCLUSIONS: This study provides new insights into the role of historical and current environmental determinants on the functional structure of fish assemblages and strengthens the proposal that the independence of facets of functional diversity from the species richness makes them essential biodiversity variables to understand the structure of communities and their responses to global changes.
    Keywords biogeography ; climate ; energy ; freshwater ; freshwater fish ; functional diversity ; glaciation ; habitats ; rivers ; species richness
    Language English
    Dates of publication 2022-04
    Size p. 700-713.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2021283-5
    ISSN 1466-8238 ; 1466-822X ; 0960-7447
    ISSN (online) 1466-8238
    ISSN 1466-822X ; 0960-7447
    DOI 10.1111/geb.13455
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  6. Article: Characterizing the spatial signal of environmental DNA in river systems using a community ecology approach

    Cantera, Isabel / Decotte, Jean‐Baptiste / Dejean, Tony / Murienne, Jérôme / Vigouroux, Régis / Valentini, Alice / Brosse, Sébastien

    Molecular ecology resources. 2022 May, v. 22, no. 4

    2022  

    Abstract: Environmental DNA (eDNA) is gaining a growing popularity among scientists but its applicability to biodiversity research and management remains limited in river systems by the lack of knowledge about the spatial extent of the downstream transport of eDNA. ...

    Abstract Environmental DNA (eDNA) is gaining a growing popularity among scientists but its applicability to biodiversity research and management remains limited in river systems by the lack of knowledge about the spatial extent of the downstream transport of eDNA. Here, we assessed the ability of eDNA inventories to retrieve spatial patterns of fish assemblages along two large and species‐rich Neotropical rivers. We first examined overall community variation with distance through the distance decay of similarity and compared this pattern to capture‐based samples. We then considered previous knowledge on individual species distributions, and compared it to the eDNA inventories for a set of 53 species. eDNA collected from 28 sites in the Maroni and 25 sites in the Oyapock rivers permitted to retrieve a decline of species similarity with increasing distance between sites. The distance decay of similarity derived from eDNA was similar and even more pronounced than that obtained with capture‐based methods (gill‐nets). In addition, the species upstream‐downstream distribution range derived from eDNA matched to the known distribution of most species. Our results demonstrate that environmental DNA does not represent an integrative measure of biodiversity across the whole upstream river basin but provides a relevant picture of local fish assemblages. Importantly, the spatial signal gathered from eDNA was therefore comparable to that gathered with local capture‐based methods, which describes fish fauna over a few hundred metres.
    Keywords Neotropics ; biodiversity ; environmental DNA ; fauna ; fish ; gillnets ; rivers ; watersheds
    Language English
    Dates of publication 2022-05
    Size p. 1274-1283.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 2406816-0
    ISSN 1471-8286 ; 1755-098X
    ISSN (online) 1471-8286
    ISSN 1755-098X
    DOI 10.1111/1755-0998.13544
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  7. Article: Global patterns and predictors of trophic position, body size and jaw size in fishes

    Kopf, R. Keller / Yen, Jian D. L / Nimmo, Dale G / Brosse, Sébastien / Villéger, Sébastien

    Global ecology and biogeography. 2021 Feb., v. 30, no. 2

    2021  

    Abstract: AIM: The aim of this study was test whether maximum body mass and jaw length are reliable predictors of trophic position (TP) in fishes, and to compare linear and nonlinear machine‐learning (ML) models incorporating biogeography, habitat and other ... ...

    Abstract AIM: The aim of this study was test whether maximum body mass and jaw length are reliable predictors of trophic position (TP) in fishes, and to compare linear and nonlinear machine‐learning (ML) models incorporating biogeography, habitat and other morphological traits. LOCATION: Global. TIME PERIOD: Modern. MAJOR TAXA STUDIED: Fishes. METHODS: We compiled a global database of TP (2.0–4.5), maximum body mass, jaw length, order, ecoregion, habitat and other morphological traits of freshwater, estuarine and diadromous fishes (n = 1,991). We used Bayesian linear mixed effects and ML, with r² analogues and 10‐fold cross‐validation, to explain and predict TP. RESULTS: Random forest models outperformed Bayesian models in all comparisons. Jaw length was the most influential predictor of TP, but was weakly associated with body mass except in five orders of largely piscivorous fishes. Trophic position did not scale positively with body mass in global ecoregions, riverine fishes, or in 29/30 orders, but scaled positively in lacustrine fishes and Perciformes. Significant negative TP–body mass scaling was observed in Characiformes. Best models explained 55% of the global variation in TP, but over‐estimated the position of herbivores‐detritivores, and under‐estimated the position of top predators. MAIN CONCLUSIONS: Our study provides support for jaw length as an important mechanism constraining TP in one of the world’s largest groups of vertebrates. Jaw length and body mass were weakly correlated, and therefore body size was not a strong predictor of TP. The diversification of large‐bodied herbivores‐detritivores and omnivores in freshwater ecosystems, coupled with small predators in species‐rich orders (e.g., Cypriniformes, Characiformes) in temperate and tropical rivers explains why TP globally shows a weak relationship with body size. Our model validation results underscore the importance of not assuming that explanatory power extends to predictive capacity in macroecology and machine‐learning models.
    Keywords Bayesian theory ; Characiformes ; Cypriniformes ; Perciformes ; algorithms ; artificial intelligence ; biogeography ; body size ; databases ; diadromous fish ; ecoregions ; estuaries ; exhibitions ; freshwater ; freshwater ecosystems ; habitats ; length ; mass ; model validation ; models ; omnivores ; piscivorous fish ; predators ; riparian areas ; rivers
    Language English
    Dates of publication 2021-02
    Size p. 414-428.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note NAL-light ; JOURNAL ARTICLE
    ZDB-ID 2021283-5
    ISSN 1466-8238 ; 1466-822X ; 0960-7447
    ISSN (online) 1466-8238
    ISSN 1466-822X ; 0960-7447
    DOI 10.1111/geb.13227
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  8. Article ; Online: Extinction of threatened vertebrates will lead to idiosyncratic changes in functional diversity across the world.

    Toussaint, Aurele / Brosse, Sébastien / Bueno, C Guillermo / Pärtel, Meelis / Tamme, Riin / Carmona, Carlos P

    Nature communications

    2021  Volume 12, Issue 1, Page(s) 5162

    Abstract: Although species with larger body size and slow pace of life have a higher risk of extinction at a global scale, it is unclear whether this global trend will be consistent across biogeographic realms. Here we measure the functional diversity of ... ...

    Abstract Although species with larger body size and slow pace of life have a higher risk of extinction at a global scale, it is unclear whether this global trend will be consistent across biogeographic realms. Here we measure the functional diversity of terrestrial and freshwater vertebrates in the six terrestrial biogeographic realms and predict their future changes through scenarios mimicking a gradient of extinction risk of threatened species. We show vastly different effects of extinctions on functional diversity between taxonomic groups and realms, ranging from almost no decline to deep functional losses. The Indo-Malay and Palearctic realms are particularly inclined to experience a drastic loss of functional diversity reaching 29 and 31%, respectively. Birds, mammals, and reptiles regionally display a consistent functional diversity loss, while the projected losses of amphibians and freshwater fishes differ across realms. More efficient global conservation policies should consider marked regional losses of functional diversity across the world.
    MeSH term(s) Animals ; Biodiversity ; Conservation of Natural Resources ; Ecosystem ; Endangered Species/statistics & numerical data ; Extinction, Biological ; Vertebrates/classification ; Vertebrates/growth & development
    Language English
    Publishing date 2021-08-27
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-021-25293-0
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  9. Article ; Online: Human impacts on global freshwater fish biodiversity.

    Su, Guohuan / Logez, Maxime / Xu, Jun / Tao, Shengli / Villéger, Sébastien / Brosse, Sébastien

    Science (New York, N.Y.)

    2021  Volume 371, Issue 6531, Page(s) 835–838

    Abstract: Freshwater fish represent one-fourth of the world's vertebrates and provide irreplaceable goods and services but are increasingly affected by human activities. A new index, Cumulative Change in Biodiversity Facets, revealed marked changes in biodiversity ...

    Abstract Freshwater fish represent one-fourth of the world's vertebrates and provide irreplaceable goods and services but are increasingly affected by human activities. A new index, Cumulative Change in Biodiversity Facets, revealed marked changes in biodiversity in >50% of the world's rivers covering >40% of the world's continental surface and >37% of the world's river length, whereas <14% of the world's surface and river length remain least impacted. Present-day rivers are more similar to each other and have more fish species with more diverse morphologies and longer evolutionary legacies. In temperate rivers, where the impact has been greatest, biodiversity changes were primarily due to river fragmentation and introduction of non-native species.
    MeSH term(s) Animals ; Biodiversity ; Climate ; Fishes/classification ; Human Activities ; Humans ; Phylogeny ; Rivers
    Language English
    Publishing date 2021-02-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abd3369
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  10. Article ; Online: Environmental DNA reveals a mismatch between diversity facets of Amazonian fishes in response to contrasting geographical, environmental and anthropogenic effects.

    Coutant, Opale / Jézéquel, Céline / Mokany, Karel / Cantera, Isabel / Covain, Raphaël / Valentini, Alice / Dejean, Tony / Brosse, Sébastien / Murienne, Jérôme

    Global change biology

    2022  Volume 29, Issue 7, Page(s) 1741–1758

    Abstract: Freshwater ecosystems are among the most endangered ecosystem in the world. Understanding how human activities affect these ecosystems requires disentangling and quantifying the contribution of the factors driving community assembly. While it has been ... ...

    Abstract Freshwater ecosystems are among the most endangered ecosystem in the world. Understanding how human activities affect these ecosystems requires disentangling and quantifying the contribution of the factors driving community assembly. While it has been largely studied in temperate freshwaters, tropical ecosystems remain challenging to study due to the high species richness and the lack of knowledge on species distribution. Here, the use of eDNA-based fish inventories combined to a community-level modelling approach allowed depicting of assembly rules and quantifying the relative contribution of geographic, environmental and anthropic factors to fish assembly. We then used the model predictions to map spatial biodiversity and assess the representativity of sites surveyed in French Guiana within the EU Water Framework Directive (WFD) and highlighted areas that should host unique freshwater fish assemblages. We demonstrated a mismatch between the taxonomic and functional diversity. Taxonomic assemblages between but also within basins were mainly the results of dispersal limitation resulting from basin isolation and natural river barriers. Contrastingly, functional assemblages were ruled by environmental and anthropic factors. The regional mapping of fish diversity indicated that the sites surveyed within the EU WFD had a better representativity of the regional functional diversity than taxonomic diversity. Importantly, we also showed that the assemblages expected to be the most altered by anthropic factors were the most poorly represented in terms of functional diversity in the surveyed sites. The predictions of unique functional and taxonomic assemblages could, therefore, guide the establishment of new survey sites to increase fish diversity representativity and improve this monitoring program.
    MeSH term(s) Animals ; Humans ; Ecosystem ; DNA, Environmental ; Anthropogenic Effects ; Biodiversity ; Fishes/physiology ; Environmental Monitoring
    Chemical Substances DNA, Environmental
    Language English
    Publishing date 2022-11-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1281439-8
    ISSN 1365-2486 ; 1354-1013
    ISSN (online) 1365-2486
    ISSN 1354-1013
    DOI 10.1111/gcb.16533
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