Influences of the area, shape and connectivity of coastal lakes on the taxonomic and functional diversity of fish communities in Southern Brazil

被引：4

作者：

Hartz, Sandra M. ^{[1
,2
]}

Rocha, Elise A. ^{[2
]}

Brum, Fernanda T. ^{[3
]}

Luza, Andre L. ^{[2
]}

Guimaraes, Tais de F. R. ^{[2
]}

Becker, Fernando G. ^{[1
,2
]}

机构：

[1] Univ Fed Rio Grande do Sul, Dept Ecol, Ave Bento Goncalves 9500, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Fed Rio Grande do Sul, Programa Posgrad Ecol, Ave Bento Goncalves 9500, BR-91501970 Porto Alegre, RS, Brazil

[3] Univ Fed Parana, Setor Ciencias Biol, Programa Posgrad Ecol & Conservacao, Ave Coronel Francisco H dos Santos 210, BR-81531980 Curitiba, PR, Brazil

来源：

ZOOLOGIA | 2019年 / 36卷

关键词：

Alpha diversity; environmental filters; limiting similarity; neutral paradigm; geographic information system; SPECIES RICHNESS; NORTHERN WISCONSIN; BETA REGRESSION; ASSEMBLY RULES; LAND-USE; PATTERNS; LAGOONS; ECOMORPHOLOGY; DYNAMICS; CONSERVATION;

D O I：

10.3897/zoologia.36.e23539

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

In this study we investigated the influence of landscape variables on the alpha taxonomic and functional diversity of fish communities in coastal lakes. We built an analytical framework that included possible causal connections among variables, which we analyzed using path analysis. We obtained landscape metrics for the area, shape and connectivity (estuary connectivity and primary connectivity to neighboring lakes) of 37 coastal lakes in the Tramandai River Basin. We collected fish data from 49 species using standardized sampling with gillnets and obtained a set of traits related to dispersal abilities and food acquisition. The model that best explained the taxonomic diversity and functional richness took into account the shape of the lakes. Functional richness was also explained by estuary connectivity. Functional evenness and dispersion were not predicted by area or connectivity, but they were influenced by the abundant freshwater species. This indicates that all lakes support most of the regional functional diversity. The results highlight the importance of the dispersal process in this lake system and allow the conclusion that considering multiple diversity dimensions can aid the conservation of local and regional fish communities.

引用

页数：12

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