Composition, diversity, and environmental correlates of benthic macroinvertebrate communities in the five largest freshwater lakes of China

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• 作者：Yongjiu Cai ; You Zhang ; Zhaoshi Wu ; Yuwei Chen ; Jun Xu ; Zhijun Gong
• 关键词：Yangtze River ; Shallow lakes ; Alpha and beta diversity ; Additive diversity partitioning ; Dispersal ; Environmental filtering
• 刊名：Hydrobiologia
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：788
• 期：1
• 页码：85-98
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Freshwater & Marine Ecology; Ecology; Zoology;
• 出版者：Springer International Publishing
• ISSN：1573-5117
• 卷排序：788

文摘

China’s five largest freshwater lakes (Poyang, Dongting, Taihu, Hongze, and Chaohu) are all located in lowland regions and differ greatly in lake morphology, hydrology, and water chemistry. However, basic knowledge of diversity patterns and factors driving macroinvertebrate community structure is lacking. We analyzed the composition and diversity of benthic macroinvertebrates and evaluated the roles of environmental factors and dispersal processes in determining beta diversity at both the lake and regional scales. The two Yangtze-connected lakes (i.e., Lakes Poyang and Dongting) were highest in taxonomic diversity. Differences in taxonomic composition were evident among the five lakes, with the two Yangtze-connected lakes dominated by bivalves and/or gastropods, while Lake Taihu showed great changes in taxonomic composition among sites in accordance with its high habitat heterogeneity. Lake Hongze was dominated by polychaetes, crustaceans, and bivalves. The eutrophic–hypertrophic Lake Chaohu was exclusively dominated by chironomids and oligochaetes. At the lake scale, total γ-diversity was mainly attributed to β₁-diversity (among sites) ranging from 57.9 to 87.6%. The total γ-diversity at the regional scale was primarily related to higher β-diversity, with β₁ and β₂ (among lakes) accounting for 30.4 and 58.8% of total taxa richness, respectively. Environmental conditions appear to be important in structuring benthic macroinvertebrate communities at both the lake and regional scale. Dispersal does not appear to affect distribution of macroinvertebrates at the lake scale.