Partitioning global patterns of freshwater fish beta diversity reveals contrasting signatures of past climate changes

Leprieur, Fabien; Tedesco, Pablo A.; Hugueny, Bernard; Beauchard, Olivier; Dürr, Hans H.; Brosse, Sébastien; Oberdorff, Thierry

doi:10.1111/j.1461-0248.2011.01589.x

Cited by 283 publications

(351 citation statements)

References 47 publications

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“…The significance of the tests was checked using F-tests based on sequential sums of squares from 1000 permutations of the raw data (ns, non-significant, *P < 0.05, ***P < 0.001). that characterizes the Neotropical fish faunas (Hubert and Renno, 2006;Leprieur et al, 2011;Tedesco et al, 2012), and more precisely the high species turnover between the two basins, i.e., Oyapock contains 66 unique species and the Maroni basin 104, while only 138 species are shared between the two basins (Le . The orientation of the river basin also profoundly affected fish assemblage structure as it explained about 28% of the variability between assemblages.…”

Section: Discussionmentioning

confidence: 99%

Determinants of fish assemblage structure in Mount Itoupé mountain streams (French Guiana)

Brosse

Montoya‐Burgos

Grenouillet

et al. 2013

Ann. Limnol. - Int. J. Lim.

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-Fish assemblages inhabiting the mountain streams of the Guiana shield have scarcely been studied. Here we investigated fish assemblages in eight headwater mountain streams of the Mount Itoupe( French Guiana), and tested how local freshwater fish assemblages are shaped by environmental characteristics. We show that Mount Itoupe´streams host uneven species assemblages, characterized by low species richness (less than ten species per site) and a high proportion of small Siluriform species. Differences in fish assemblage composition between the sites were mainly due to basin identity, but regional climate and position of the site in the river gradient also had a significant effect, although of lower magnitude. In contrast, local habitat hardly affected fish richness, abundances or assemblage composition. Species richness increased along the upstream-downstream gradient, whereas fish abundance depended mainly on the slope orientation of Mount Itoupe´. Although these results need confirmation on a larger amount of sampling sites, located on other Guianese mountains, this preliminary study shows that the mountain streams of the Guiana Shield, although rarely investigated, host not only uneven species assemblages, but also present an original combination of environmental determinants shaping fish assemblage structure. Those rare and original ecosystems hence deserve more attention and should be preserved from human disturbances.

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Section: Discussionmentioning

confidence: 99%

Determinants of fish assemblage structure in Mount Itoupé mountain streams (French Guiana)

Brosse

Montoya‐Burgos

Grenouillet

et al. 2013

Ann. Limnol. - Int. J. Lim.

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“…Alpha (local) diversity and gamma (regional) diversity are commonly measured, but beta diversity is not as clearly understood. Beta diversity, defined as turnover or patchiness in species identities and abundances across space, provides us with the basic understanding of how species are distributed, as well as how alpha and gamma diversity are related (e.g., Whittaker 1960, Olden and Poff 2003, Novotny et al 2007, Wilsey 2010, Anderson et al 2011, Leprieur et al 2011.…”

Section: Introductionmentioning

confidence: 99%

Differences in beta diversity between exotic and native grasslands vary with scale along a latitudinal gradient

Martin

Wilsey

2015

Ecology

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Biodiversity can be partitioned into alpha, beta, and gamma components, and beta diversity is not as clearly understood. Biotic homogenization predicts that exotic species should lower beta diversity at global and continental scales, but it is still unclear how exotic species impact beta diversity at smaller scales. Exotic species could theoretically increase or decrease beta diversity relative to natives depending on many factors, including abiotic conditions, community assembly history, management, dispersal rates of species, and connectivity among patches. We sampled plant species abundances in 42 novel, exotic-and native-dominated (remnant) grasslands across a latitudinal gradient in the tallgrass prairie region, and tested whether exotic and native grasslands differed in beta diversity at three scales: across sites within the entire biome, across sites within regions, and across locations within sites. Exotic-dominated grasslands differed from native-dominated grasslands in beta diversity at all scales, but the direction of the difference changed from positive to negative as scales went from large to small. Contrary to expectations, exotic-dominated grasslands had higher beta diversity than native-dominated grasslands at the largest scale considered. This occurred because the identity of dominant exotic species varied across the latitudinal gradient, with many exotic grassland pairs exhibiting zero similarity, whereas native-dominated grasslands differed more gradually with distance. Beta diversity among sites within a region was variable, with exotic-dominated grasslands having 29% higher beta diversity than native grasslands in the south and 33% lower beta diversity in the north. Within sites, beta diversity was 26% lower in exotic-dominated than native grasslands. Our results provide evidence that different regional identities and abundances of exotics, and lack of connectivity in fragmented landscapes can alter beta diversity in unexpected ways across spatial scales. Abstract. Biodiversity can be partitioned into alpha, beta, and gamma components, and beta diversity is not as clearly understood. Biotic homogenization predicts that exotic species should lower beta diversity at global and continental scales, but it is still unclear how exotic species impact beta diversity at smaller scales. Exotic species could theoretically increase or decrease beta diversity relative to natives depending on many factors, including abiotic conditions, community assembly history, management, dispersal rates of species, and connectivity among patches. We sampled plant species abundances in 42 novel, exotic-and native-dominated (remnant) grasslands across a latitudinal gradient in the tallgrass prairie region, and tested whether exotic and native grasslands differed in beta diversity at three scales: across sites within the entire biome, across sites within regions, and across locations within sites. Exotic-dominated grasslands differed from native-dominated grasslands in beta diversity at all scales, but the direc...

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“…For example, two cases of the changes in community compositional characteristics, in which one has significant changes in the number of species and no species replacement and the other the opposite pattern, can generate similar values of the overall β-diversity (Baselga 2010). While the overall β-diversity changes in the former case primarily result from species loss or gain in each local community, those in the latter case reflect the simultaneous gain and loss of species in each locality leading to the replacement of one species by another (Leprieur et al 2011). The resultant nestedness component is also referred to as "richness difference," which represents how differences in species richness that are not due to species turnover contribute to patterns of the overall β-diversity (Legendre 2014).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 88%

Concordance and discordance between taxonomic and functional homogenization: responses of soil mite assemblages to forest conversion

et al. 2015

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The compositional characteristics of ecological assemblages are often simplified; this process is termed "biotic homogenization." This process of biological reorganization occurs not only taxonomically but also functionally. Testing both aspects of homogenization is essential if ecosystem functioning supported by a diverse mosaic of functional traits in the landscape is concerned. Here, we aimed to infer the underlying processes of taxonomic/functional homogenization at the local scale, which is a scale that is meaningful for this research question. We recorded species of litter-dwelling oribatid mites along a gradient of forest conversion from a natural forest to a monoculture larch plantation in Japan (in total 11 stands), and collected data on the functional traits of the recorded species to quantify functional diversity. We calculated the taxonomic and functional β-diversity, an index of biotic homogenization. We found that both the taxonomic and functional β-diversity decreased with larch dominance (stand homogenization). After further deconstructing β-diversity into the components of turnover and nestedness, which reflect different processes of community organization, a significant decrease in the response to larch dominance was observed only for the functional turnover. As a result, there was a steeper decline in the functional β-diversity than the taxonomic β-diversity. This discordance between the taxonomic and functional response suggests that species replacement occurs between species that are functionally redundant under environmental homogenization, ultimately leading to the stronger homogenization of functional diversity. The insights gained from community organization of oribatid mites suggest that the functional characteristics of local assemblages, which support the functionality of ecosystems, are of more concern in human-dominated forest landscapes.

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Partitioning global patterns of freshwater fish beta diversity reveals contrasting signatures of past climate changes

Cited by 283 publications

References 47 publications

Determinants of fish assemblage structure in Mount Itoupé mountain streams (French Guiana)

Determinants of fish assemblage structure in Mount Itoupé mountain streams (French Guiana)

Differences in beta diversity between exotic and native grasslands vary with scale along a latitudinal gradient

Concordance and discordance between taxonomic and functional homogenization: responses of soil mite assemblages to forest conversion

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