High <i>β</i>‐diversity maintains regional diversity in Brazilian tropical coastal stream fish assemblages

Teshima, Fernanda Ayumi; Mello, Bruno José Gomes de; Ferreira, Fábio Cop; Cetra, Maurício

doi:10.1111/fme.12194

Cited by 7 publications

(5 citation statements)

References 42 publications

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“…The influence of pure local‐scale features was always higher than pure catchment‐scale features (including landscape dynamics indicators). In tropical systems, pure local environmental variables explained the variation in fish β‐diversity (Genner et al., ; Teshima, Mello, Ferreira, & Cetra, ) and the same outcome has been also described for tropical plants β‐diversity (Tuomisto, Ruokolainen, & Yli‐Halla, ). This reasoning probably does not apply for catchment‐scale features in our current agricultural scenario, which had little or no direct influence on the different facets of β‐diversity.…”

Section: Discussionmentioning

confidence: 65%

“…This result once again supports species-sorting mechanisms as the primary drivers of assemblage structure in aquatic systems (Bini et al, 2014;Heino, The influence of pure local-scale features was always higher than pure catchment-scale features (including landscape dynamics indicators). In tropical systems, pure local environmental variables explained the variation in fish β-diversity (Genner et al, 2004;Teshima, Mello, Ferreira, & Cetra, 2016) and the same outcome has been also described for tropical plants β-diversity (Tuomisto, Ruokolainen, & Yli-Halla, 2003 land-use in the catchment is a better predictor of biodiversity than current land-use in agricultural regions (Harding, Benfield, Bolstad, Helfman, & Jones, 1998;Surasinghe & Baldwin, 2014). It is also possible that this reasoning applies to β-diversity, but it remains to be fully explored.…”

Section: Influence Of Environmental Predictors and Dispersal Processesmentioning

confidence: 62%

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Taxonomic, functional, and phylogenetic β‐diversity patterns of stream fish assemblages in tropical agroecosystems

et al. 2019

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A multi‐faceted assessment of diversity is needed to improve our understanding of the mechanisms underlying biodiversity patterns and to reveal the impacts of land use alterations on β‐diversity. In this study, we analysed stream fish β‐diversity based on taxonomic, functional, and phylogenetic facets in an intensively cultivated tropical region. We sampled 43 stream reaches in the northwest of São Paulo State, south‐eastern Brazil. Each sampling site was characterised according to catchment‐scale features, landscape dynamic indicators, local‐scale features, and distance between stream reaches as network distance (a proxy for dispersal processes). As response variables, we considered taxonomic, functional, and phylogenetic β‐diversities coupled with a null‐model approach. For each β‐diversity metric, we calculated the mean overall value and tested whether the mean value was different from that expected by chance. To examine variation in β‐diversity for the three facets and determine the relative contributions of predictor variables, we used a distance‐based approach. Taxonomic and functional β‐diversities were higher from the expected value under a null model, suggesting that community assembly of these facets was dominated by deterministic processes. In contrast, phylogenetic β‐diversity was not different from that expected by chance, suggesting that the lineage composition of these assemblages was random. Furthermore, for all three facets, there was a positive environment‐β‐diversity relationship that was determined primarily by local‐scale features, whereas catchment features and landscape dynamic indicators were not important. In addition, none of the β‐diversity facets was correlated with stream network distance, indicating that dispersal processes were not strongly structuring fish assemblages. Our study suggested that although multiple facets of stream fish β‐diversity are ruled mainly by deterministic processes (e.g. species sorting), stochasticity is also important in community assembly. An interesting finding was the mismatch between phylogenetic versus taxonomic and functional β‐diversity. It is likely that the lack of non‐random structure in phylogenetic β‐diversity is due to the variation of phylogenetic signal in some functional traits. Given that landscape dynamic indicators were not correlated with measures of β‐diversity, we suggest that the recent sugarcane expansion in our study area probably has not critically affected stream fish β‐diversity. Also, it is possible that catchment variables presented little variability and did not overwhelm the effect of local environmental variables on β‐diversity. In conclusion, our study suggests that even highly disturbed tropical agroecosystems with a pool of species that is probably decimated, can still display a relatively high β‐diversity determined mainly by species sorting. These findings suggest key environmental features that must be considered in restoration or conservation of β‐diversity in agroecosystems. Specifically, since variation i...

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Section: Discussionmentioning

confidence: 65%

Section: Influence Of Environmental Predictors and Dispersal Processesmentioning

confidence: 62%

Taxonomic, functional, and phylogenetic β‐diversity patterns of stream fish assemblages in tropical agroecosystems

et al. 2019

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“…Beta diversity was found to be more critical for total diversity (i.e., gamma diversity) than the average local diversity. These findings highlight the importance of streams environmental heterogeneity for maintaining regional fish diversity (Erös 2007, Casatti et al 2009, Teshima et al 2016.…”

Section: Resultsmentioning

confidence: 72%

“…Of this total, 97 species occur in the Ribeira de Iguape River basin. Since 2011, at least six species can be added to this list: Pimelodus multicratifer Ribeiro (Teshima et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Ichthyofauna from “serranias costeiras” of the Ribeira de Iguape River basin, Southeast Brazil

et al. 2020

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The Ribeira de Iguape River basin has about 100 fish species. This study aimed to characterize the fish community from “serranias costeiras” of the Ribeira de Iguape River basin. Samplings were conducted with electrofishing during the dry season in the years 2018-2019. The sampling effort consisted of 30 streams stretches. As a result, 50 species were captured, distributed in 37 genera, 11 families, and six orders. The species richness estimate (SChao1) was 57 species, and the coverage estimate for the entire data set was C = 0.998. Harttia kronei and Chasmocranus lopezae are endemic species and can be used as bioindicators of streams in this river basin. We captured approximately nine species by stream stretch. Beta diversity was found to be more critical for gamma diversity than alpha diversity. This finding highlights the streams environmental heterogeneity importance for maintaining regional fish diversity. We captured eight individuals of the threatened species Spintherobolus papilliferus and this indicates an expansion in the geographic distribution of this species.

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“…Maintaining fish biodiversity in higher elevation basins will be reflected in rivers and reservoirs further down river basins (Vannote et al, 1980). Regionally, species diversity between streams is more important than local diversity, thereby indicating the conservation importance of multiple streams that make up the upper reaches of watersheds (Teshima et al, 2016). Habitat loss is a primary concern identified for all South American river basins (Barletta et al, 2015).…”

Section: Management Implicationsmentioning

confidence: 99%

Taxonomic and functional diversity patterns of stream fish assemblages from Brazilian Atlantic Rain Forest

Cetra

Garibaldi

Teresa

et al. 2022

Fisheries Management Eco

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Disentangling the hierarchical structure of river systems and multi-scale environmental effects is essential for understanding freshwater fish community structure and function. We sampled 70 stream stretches to investigate how the taxonomic and functional composition and diversity of fish assemblages responded to the environment considering a hierarchical organisation of streams in three Brazilian watersheds (Upper Sorocaba, Upper Paranapanema and Upper Ribeira de Iguape). Functional diversity indicated that stream fish community function was independent of the watershed. The most critical environmental variable was substrate gradient. In streams with a consolidated substrate, equitability and functional dispersion were low due to invertivores occurring in this type of substrate. Our results highlight the importance of local environmental filters for shaping streams fish assemblages across different basins. This shaping was more evident when functional descriptors of assemblages were analysed, thereby reinforcing the importance of an approach based on traits as a tool to elucidate local community assembly processes at broader spatial scales.

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High β‐diversity maintains regional diversity in Brazilian tropical coastal stream fish assemblages

Cited by 7 publications

References 42 publications

Taxonomic, functional, and phylogenetic β‐diversity patterns of stream fish assemblages in tropical agroecosystems

Taxonomic, functional, and phylogenetic β‐diversity patterns of stream fish assemblages in tropical agroecosystems

Ichthyofauna from “serranias costeiras” of the Ribeira de Iguape River basin, Southeast Brazil

Taxonomic and functional diversity patterns of stream fish assemblages from Brazilian Atlantic Rain Forest

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