Taxonomic and functional diversity in a subtropical stream: A longitudinal pattern analysis

文献类型： 外文期刊

第一作者： Zhang, Dong

作者： Zhang, Dong;Heng, Wujing;Chu, Ling;Yan, Yunzhi;Zhang, Dong;Heng, Wujing;Chu, Ling;Yan, Yunzhi;Xu, Dongpo;Xu, Dongpo;Kang, Bin

作者机构：

关键词： taxonomic and functional diversities; the river continuum; turnover and nestedness; alpha and beta-diversities

期刊名称：ECOLOGY OF FRESHWATER FISH （ 影响因子：2.039； 五年影响因子：2.052 ）

ISSN： 0906-6691

年卷期： 2020 年 29 卷 4 期

页码：

收录情况： SCI

摘要： Identifying the spatial patterns of fish diversity in streams is basic for the conservation and management of stream fishes. The "upstream-downstream" patterns in the taxonomic alpha-diversity of stream fishes have been widely surveyed. However, the longitudinal patterns in the functional diversity and beta-diversity of stream fishes have been given less attention. In this study, we surveyed fishes along an upstream-downstream gradient in a headwater stream of the Qiantang River, China, and examined the longitudinal variations in fish diversity. Our aims were to assess whether the longitudinal patterns in fish diversity were consistent between the taxonomic and functional metrics and between the alpha- and beta-aspects of diversity. We found that both species richness and functional richness of fishes showed a hump-shaped relationship with the distance from headwaters, while both taxonomic and functional beta-diversities presented the U-shaped distributions along the river continuum. Functional diversity related more to the distance from headwaters than taxonomic diversity. Despite their similar relationship with the distance from headwaters, taxonomic and functional beta-diversities were dominated by species turnover and function nestedness components, respectively. Our results suggest that, along the river continuum in a subtropical stream, the alpha- and beta-aspects of fish diversity present different longitudinal variations. Although the taxonomic and functional diversity shows similar relationships with distance from headwaters, their spatial variations are driven by different ecological processes.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序