A global database on freshwater fish species occurrence in drainage basins

Tedesco, Pablo A.; Beauchard, Olivier; Bigorne, Rémy; Blanchet, Simon; Buisson, Laëtitia; Conti, Lorenza; Cornu, Jean‐François; Dias, Murilo S.; Grenouillet, Gaël; Hugueny, Bernard; Jézéquel, Céline; Leprieur, Fabien; Brosse, Sébastien; Oberdorff, Thierry

doi:10.1038/sdata.2017.141

Cited by 184 publications

(210 citation statements)

References 32 publications

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“…In conclusion, our findings suggest that the difference in morphological distributions between the fish faunas of the six biogeographic realms is driven not only by the evolutionary divergence between realm fish faunas (Heino et al, ; Hugueny, ; Tedesco et al, ), but also by the distinct environmental constraints acting in each realm. Moreover, such morphological differences among realms translates into a shared strong contribution of morphologically extreme species among realms.…”

Section: Discussionmentioning

confidence: 57%

“…Fish occurrence data can be retrieved freely from https://doi.org/10.6084/m9.figshare.c.3739145, and metadata are available in Tedesco et al (). Information about the 9,150 species with combined trait values (PC1–PC5) used in this study is provided as a supplementary (Table S5), which also indicates the morphologically extreme and most morphologically extreme species and the IUCN Red List status for each species.…”

Section: Data Accessibilitymentioning

confidence: 99%

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Morphological diversity of freshwater fishes differs between realms, but morphologically extreme species are widespread

Villéger

Brosse

2018

Global Ecol Biogeogr

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Aim The aim was to analyse the morphological diversity of the world freshwater fish fauna. We tested to which extent the distributions of morphological traits are supported by extreme morphologies and how those extreme morphologies are distributed among realms and affect the functional vulnerability. We also analysed the contribution of between‐ and within‐order morphological variability to the morphological differences between realms. Major taxa studied Freshwater fish. Location Global. Time period 1960s–2010s. Methods We used a global database of freshwater fishes from the six realms. Ten morphological traits were measured on 9,150 species, that is, 75% of the ca. 13,000 freshwater fish species. A principal components analysis was conducted to combine the 10 traits into a multidimensional space. We used Kolmogorov–Smirnov tests to compare the difference in morphological diversity between the six realms and between and within the major fish orders. We then identified the morphologically extreme species and quantified their contributions to the morphological range to assess the functional vulnerability and redundancy of fish faunas in the six biogeographical realms for freshwater ecosystems. Results We report a strong morphological variability among freshwater fishes of the world, with significant morphological differences among realm fish faunas, caused by an interplay between taxonomic composition of the realm faunas and morphological differences within orders among the realms. Morphologically extreme species accounted for a large percentage of the filling of the global morphological space and are distributed throughout the world. Main conclusions Fish morphological diversity is largely supported by a few species with extreme trait combinations, indicating that functional vulnerability exists throughout the world. Our results suggest that more attention should be paid to these morphologically extreme species and that they should be protected to ensure the sustainability of functions they support.

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Section: Discussionmentioning

confidence: 57%

Section: Data Accessibilitymentioning

confidence: 99%

Morphological diversity of freshwater fishes differs between realms, but morphologically extreme species are widespread

Villéger

Brosse

2018

Global Ecol Biogeogr

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“…This first global quantitative analysis of the biogeography of freshwater fishes is based on a large‐scale database compiling occurrence data from thousands of sources and is thus inevitably subject to errors and incomplete data (Tedesco et al, ). To minimize errors, a careful screening and correction procedure has been implemented for this database (see Tedesco et al, ). Reassuringly, the results obtained from other clustering methods as well as our sensitivity analysis suggested that the regions we identified are robust.…”

Section: Discussionmentioning

confidence: 99%

“…Global distribution of freshwater fish species richness per drainage basin based on the global database on freshwater fish species occurrence in drainage basins (Tedesco et al, ). Grey‐shaded areas correspond to basins without records of native strictly freshwater species [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Methodsmentioning

confidence: 99%

Global biogeographical regions of freshwater fish species

Leroy

Dias

Giraud

et al. 2019

Journal of Biogeography

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Aim To define the major biogeographical regions and transition zones for freshwater fish species. Taxon Strictly freshwater species of actinopterygian fish (i.e. excluding marine and amphidromous fish families). Methods We based our bioregionalization on a global database of freshwater fish species occurrences in drainage basins, which, after filtering, includes 11,295 species in 2,581 basins. On the basis of this dataset, we generated a bipartite (basin‐species) network upon which we applied a hierarchical clustering algorithm (the Map Equation) to detect regions. We tested the robustness of regions with a sensitivity analysis. We identified transition zones between major regions with the participation coefficient, indicating the degree to which a basin has species from multiple regions. Results Our bioregionalization scheme showed two major supercontinental regions (Old World and New World, 50% species of the world and 99.96% endemics each). Nested within these two supercontinental regions lie six major regions (Nearctic, Neotropical, Palearctic, Ethiopian, Sino‐Oriental and Australian) with extremely high degrees of endemism (above 96% except for the Palearctic). Transition zones between regions were of limited extent compared to other groups of organisms. We identified numerous subregions with high diversity and endemism in tropical areas (e.g. Neotropical), and a few large subregions with low diversity and endemism at high latitudes (e.g. Palearctic). Main conclusions Our results suggest that regions of freshwater fish species were shaped by events of vicariance and geodispersal which were similar to other groups, but with freshwater‐specific processes of isolation that led to extremely high degrees of endemism (far exceeding endemism rates of other continental vertebrates), specific boundary locations and limited extents of transition zones. The identified bioregions and transition zones of freshwater fish species reflect the strong isolation of freshwater fish faunas for the past 10–20 million years. The extremely high endemism and diversity of freshwater fish fauna raises many questions about the biogeographical consequences of current introductions and extinctions.

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“…These disturbances can interact and their effects can accumulate in downstream systems (Jackson, Loewen, Vinebrooke, & Chimimba, ; Nõges et al., ; Schindler, ). As a result, extinction rates of freshwater biota are estimated to be 112–855 times higher than rates for terrestrial species (Collen et al., ; Tedesco et al., ). For example, between 1896 and 2006, 57 North American freshwater fish species went extinct (Burkhead, ) and, in Canada, 71 of the 207 native fish species are considered at risk by the Committee on the Status of Endangered Wildlife in Canada (Dextrase & Mandrak, ; Lamothe et al., In press).…”

Section: Introductionmentioning

confidence: 99%

Evaluating functional diversity conservation for freshwater fishes resulting from terrestrial protected areas

2019

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Protected areas are one of the hammers in conservation toolkits, yet few protected areas exist that were designed to protect freshwater ecosystems. This is problematic as freshwater ecosystems are among the most threatened systems on earth. Nonetheless, terrestrial protected areas (TPAs) may afford spill‐over benefits to freshwater ecosystems included within their boundaries, but evaluations of these potential benefits for the protection of freshwater fish diversity are lacking. Using fish community data from 175 lakes inside, outside, or bordering TPAs in Ontario, Canada, we sought to determine if TPAs preserve fish functional diversity. We focused on functional diversity because previous work indicated no taxonomic differences between these lakes, but a difference in normalised‐length size‐spectra slopes inside versus outside TPAs (indicator of unique predator–prey ratios and trophic energy transfer). We expected that communities inside TPAs would show greater functional diversity (i.e. functional dispersion and functional richness) and have more extreme trait combinations (i.e. functional divergence) than communities outside or bordering TPAs. We also tested for differences in the rarity of species‐specific functional traits between fish communities inside, outside, or bordering TPAs, between thermal guilds, and across average body size and overall prevalence of the species. Our results indicated no significant differences in functional diversity among lake fish communities inside, outside, or bordering TPAs. However, fish communities inside TPAs had more extreme trait combinations than outside TPAs because abundant species in lake communities outside TPAs had more ubiquitous trait combinations than abundant fishes inside TPAs. Small‐bodied species showed greater functional rarity than large‐bodied species, indicating that small‐bodied fishes fill functionally unique roles while the most prevalent, large‐bodied species possess a more generalist set of traits. Overall, the similarity of functional diversity metrics for lake fish communities inside, outside, or bordering TPAs in Ontario suggests that TPAs capture the functional diversity of Ontario's lake fish communities. However, we encourage similar evaluations in regions where environmental conditions and stressors are more distinct across TPA boundaries than they are in Ontario, as these types of evaluations will inform guidelines for the design of freshwater protected areas and monitoring of their effectiveness in the future.

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A global database on freshwater fish species occurrence in drainage basins

Cited by 184 publications

References 32 publications

Morphological diversity of freshwater fishes differs between realms, but morphologically extreme species are widespread

Morphological diversity of freshwater fishes differs between realms, but morphologically extreme species are widespread

Global biogeographical regions of freshwater fish species

Evaluating functional diversity conservation for freshwater fishes resulting from terrestrial protected areas

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