Eutrophication modifies the relationships between multiple facets of macroinvertebrate beta diversity and geographic distance in freshwater lakes

被引:2
作者
Jiang, Xiaoming [1 ,2 ,3 ]
Peng, Duo [1 ]
Alahuhta, Janne [3 ]
Heino, Jani [3 ]
Li, Zhengfei [2 ]
Xie, Zhicai [2 ,4 ]
机构
[1] Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg China, Xian, Shaanxi, Peoples R China
[2] Chinese Acad Sci, Inst Hydrobiol, CAS Key Lab Aquat Biodivers & Conservat, Wuhan, Peoples R China
[3] Univ Oulu, Geog Res Unit, Oulu, Finland
[4] Chinese Acad Sci, Inst Hydrobiol, CAS Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Peoples R China
基金
中国国家自然科学基金;
关键词
environmental filtering; eutrophic distance; geographic distance; macroinvertebrates; multiple diversity facets; nutrient enrichment; FUNCTIONAL DIVERSITY; BIODIVERSITY; PATTERNS; HOMOGENIZATION; TRAITS; DECAY; COMMUNITIES; ASSEMBLAGES; SIMILARITY; DIFFERENCE;
D O I
10.1111/ddi.13830
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
AimUnderstanding the distance-decay relationship (DDR) has been considered important because it reflects a combination of several ecological processes such as dispersal limitation and environmental sorting. However, effects of human disturbances on DDR are poorly known, especially in freshwater lakes. This study is aimed to examine how anthropogenic eutrophication modified the relationships between three facets (taxonomic, functional and phylogenetic) of macroinvertebrate beta diversity and geographic and environmental distances across 30 freshwater lakes.LocationThe Yangtze River floodplain, China.MethodsWe used Mantel tests to examine the relationships between multiple facets of assemblage dissimilarities (overall beta diversity, replacement and richness difference components) and geographic and environmental distances. Distance-based redundancy analysis (dbRDA) and associated variation partitioning procedures were applied to explore the relative contributions of environmental and spatial factors on the three facets of beta diversity.ResultsWe found that none of the three beta diversity facets was related to geographic distance, but all were significantly related to environmental distance, mainly mirroring eutrophication-related variables. Based on the variation partitioning approach, the macroinvertebrate assemblages examined were almost exclusively structured by environmental factors associated with eutrophication, while spatial variables had a negligible effect. Nevertheless, the different facets of beta diversity did not decrease (i.e., no homogenization trend) in lake groups showing the highest eutrophication levels, implying complex influences of anthropogenic disturbances in driving homogenization or differentiation in assemblage compositional dissimilarity.Main ConclusionsOur findings suggested that the high degrees of eutrophication acted as an environmental filter to significantly modify the spatial distance-decay relationships, possibly via decreasing the importance of dispersal limitation in shaping macroinvertebrate assemblages in the studied lakes. Given the sensitivity of beta diversity patterns to eutrophication we found in this study, we recommend that the role of anthropogenic disturbances should be incorporated into research on general ecological patterns like the DDR.
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页数:12
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