Main drivers of freshwater fish diversity across extra-tropical Southern Hemisphere rivers

Lacy, Shaw Nozaki; Corcoran, Derek; Alò, Dominique; Lessmann, Janeth; Meza, Francisco; Marquet, Pablo A.

doi:10.1007/s10750-019-04044-9

Cited by 4 publications

(7 citation statements)

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“…We assumed that the pre-European distribution of native fish was similar to that recorded at the beginning of the 20th century [ 42 ]. In Chile, this assumption is well supported because there is no evidence for extinction or translocation of native fishes during pre-European times [ 38 – 40 , 43 ]. Thus, we tallied a total of 58 fish species, 30 of which are native and 28 are exotic ( S1 Table ).…”

Section: Methodsmentioning

confidence: 99%

“…Additionally, the presence of 28 naturalized exotic fish species has aggravated the threat to the native ichthyofauna by competition and predation [ 38 , 39 ]. Recent evidence indicates that the freshwater ichthyofauna of continental Chile has suffered one of the most severe cases of anthropic impact in the entire Neotropics [ 40 , 41 ] and that its composition is undergoing both taxonomic [ 42 ] and functional homogenization [ 43 ]. Given the current situation, it becomes relevant to ask how taxonomic and functional diversity change in relation to each other along the wide geographic gradient of continental Chile.…”

Section: Introductionmentioning

confidence: 99%

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Covariation of taxonomic and functional facets of β-diversity in Chilean freshwater fish assemblages: Implications for current and future processes of biotic homogenization

et al. 2023

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The biodiversity of assemblages that experience the introduction and extinction of species may lead to responses in two important facets: The taxonomic and functional diversity. The way in which these facets are associated may reveal important implications and consequences for the conservation of those assemblages. Considering the critical situation of freshwater fishes in continental Chile (30° – 56° S), we analyzed how the taxonomic (TDβ) and functional (FDβ) facets of β-diversity, and their components of turnover and nestedness, are associated. We evaluated changes in β-diversity (ΔTDβ and ΔFDβ), turnover (ΔTDtur and ΔFDtur), and nestedness (ΔTDnes and ΔFDnes) in 20 fish assemblages from their historical (pre-European) to current composition. We also simulated future trends of these changes, assuming that native species with conservation issues would become extinct. Our results show that the fish assemblages studied are in a process of loss of β-diversity, both in taxonomic and functional facets (ΔTDβ = -3.9%; ΔFDβ = -30.4%); also, that these facets are positively correlated in the assemblages studied (r = 0.617; P < 0.05). Both components showed by loss in nestedness (ΔTDnes = -36.9%; ΔFDnes = -60.9%) but gain in turnover (ΔTDtur = 9.2%; ΔFDtur = 12.3%). The functional β-diversity decreased more than the taxonomic (ΔFDβ > ΔTDβ), which was caused chiefly by six exotic species of Salmonidae, whose geographical spread was wider and that at the same time shared several morpho-functional traits. Our forecasts, assuming an intensification in the extinction of Endangered and Vulnerable native species, indicate that the process of homogenization will continue, though at a lower rate. Our study shows that the freshwater ichthyofauna of continental Chile is undergoing biotic homogenization, and that this process involves the facets of taxonomic and functional β-diversity, which are show high correlation between historical and current compositions. Both facets show that process is influenced by nestedness, and while turnover contributes to differentiation (both taxonomic and functional), its importance is overshadowed by nestedness.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Covariation of taxonomic and functional facets of β-diversity in Chilean freshwater fish assemblages: Implications for current and future processes of biotic homogenization

et al. 2023

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“…Species richness patterns could also be associated with the unequal distribution across hemispheres of landmasses and coastal shelf areas (Somveille et al, 2015) (Lacy et al, 2019;McDowall, 2002;Unmack, 2001).…”

Section: Overall Geographic Patterns In Migration Strategiesmentioning

confidence: 99%

“…Using atmospheric variables to explain the biogeography of aquatic species can be seen as an improbable assumption and restrict the use of variables with greater explanatory power (e.g., Bio-ORACLE for oceanic species; Assis et al, 2017). However, the use of surface air temperature as a proxy for water temperature has been used widely in freshwater fish ecology (Lacy et al, 2019;Oberdorff et al, 1995) and should function in a similar manner for sea-surface temperature, which correlates with surface air temperature across large ocean areas (Cayan, 1980;Jaswal et al, 2012). Additionally,…”

Section: Limitations and Future Studiesmentioning

confidence: 99%

The macroecology of fish migration

Alò

Lacy²,

Castillo³

et al. 2020

Global Ecol. Biogeogr.

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Aim We still lack a consensus on the main variables driving changes in migratory strategies. Different hypotheses have been proposed: productivity, energy, environmental heterogeneity, and genetic predisposition. This work takes an integrative view and analyses migrations from a macroecological perspective estimating the extent to which different environmental variables and historic factors influence migratory life histories. Location Global. Time period Current. Major taxa studied Actinopterygian fishes. Methods Using public domain museum records, global repositories, and global measures of temperature, productivity, precipitation and heterogeneity, we spatially analysed the distribution of anadromous, catadromous, amphidromous, potamodromous and oceanodromous migratory fish using 1,676 species and compared it to 1,616 non‐migratory fishes. After analysing the individual roles of productivity and temperature in shaping biodiversity, we conducted path analyses including several environmental variables and principal coordinates of phylogenetic structure (PCPS). Results The different migratory strategies are not evenly distributed around the globe and phylogeny is a relevant variable in shaping current patterns. Productivity is positively related to species richness, except for anadromy and potamodromy, for which we observed a unimodal curve. Temperature significantly drives migratory species richness (except for anadromy). The role of environmental heterogeneity, measured as temperature seasonality and annual range, is strongest for anadromous species, which helps explain their skewed distribution towards higher latitudes and why the kinetic energy hypothesis fails in explaining their richness patterns. Main conclusions Overall, migratory fish richness can be explained by the interaction of multiple variables, such as productivity, temperature, environmental heterogeneity, and the role of phylogeny, but these variables interact differentially in each strategy, diverging most for the anomalous anadromous fishes. Integrating these results into a global framework to better understand the evolutionary and ecological dynamics of migration will help with predicting responses to anthropogenic climate change.

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“…However, few studies have examined responses of multiple biotic groups to pond attributes and comparatively little is known of factors affecting pond communities in the southern temperate regions where species diversity can be lower (e.g. Lacy et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

Design features of constructed floodplain ponds influence waterbird and fish communities in northern New Zealand

Garrett‐Walker

Collier

Daniel³

et al. 2020

Freshwater Biology

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1. Ponds can provide important refuges for aquatic biota on developed floodplains and are increasingly being constructed in an effort to enhance native biodiversity and ecosystem services in degraded landscapes. This study examined 34 constructed ponds to investigate the influence of design features on community composition, native biodiversity, and the biomass or abundance of common fish and waterbirds on the lower Waikato River floodplain, northern New Zealand. 2. Inundation frequency appeared to be a key factor affecting biomass of the native shortfin eel Anguilla australis and three invasive fish species (common carp [Cyprinus carpio], brown bullhead [Ameiurus nebulosus], and goldfish [Carassius auratus]), suggesting that colonisation occurred during flooding by adjacent waterbodies. Linear models indicated that shortfin eel abundance and total eel biomass were positively associated with the biomass of potential fish prey, the area occupied by islands and cover by trees in the riparian zone. 3. Native waterbird species richness was strongly related to water area, edge length (including islands) and area:perimeter ratio, with little increase in richness for ponds >1 ha in area, perimeters longer than 800 m, and ratios over 20. The protected grey teal (Anas gracilis), and the recreationally hunted species phenotypically assigned as mallard (Anas platyrhynchos + hybrids) and grey duck (Anas superciliosa + hybrids) appeared most strongly influenced, respectively, by perimeter length, water depth, and biomass of potential macroinvertebrate food supplies, suggesting variable effects of pond design attributes among waterfowl species. 4. Overall, these results indicate that constructed ponds can be designed to promote native waterbird diversity, enhance eel fishery and waterfowl gamebird services, and also limit the proliferation of some non-native invasive fish species in degraded floodplain landscapes. A hierarchy of constructed pond design attributes was identified, involving landscape position and connectivity, pond morphology and complexity, and riparian maturity and buffering, which were associated with direct (habitat) and indirect (food supply, physicochemistry) effects on biodiversity and provisioning services. | 2067 GARRETT-WALKER ET AL. 1 | INTRODUC TI ON Functional riverine floodplains provide complex arrays of aquatic habitats that support high biodiversity and a range of ecosystem services (Amoros & Bornette, 2002; Hornung, Podschun, & Pusch, 2019; Schindler et al., 2014). These environments have been degraded worldwide due to activities such as flood control, drainage, and land use intensification (e.g.

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Main drivers of freshwater fish diversity across extra-tropical Southern Hemisphere rivers

Cited by 4 publications

References 99 publications

Covariation of taxonomic and functional facets of β-diversity in Chilean freshwater fish assemblages: Implications for current and future processes of biotic homogenization

Covariation of taxonomic and functional facets of β-diversity in Chilean freshwater fish assemblages: Implications for current and future processes of biotic homogenization

The macroecology of fish migration

Design features of constructed floodplain ponds influence waterbird and fish communities in northern New Zealand

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