Functional Traits Drive the Changes in Diversity and Composition of Benthic Invertebrate Communities in Response to Hydrological Regulation

被引:1
作者
Marino, Anna [1 ,2 ]
Bona, Francesca [1 ,2 ]
Fenoglio, Stefano [1 ,2 ]
Bo, Tiziano [1 ,2 ]
机构
[1] ALPSTREAM Alpine Stream Res Ctr, I-12030 Ostana, Italy
[2] Univ Turin, Dept Life Sci & Syst Biol, Via Acad Albertina 13, I-10123 Turin, Italy
关键词
benthos; dams; hydrological stress; functional feeding groups; biological groups; MACROINVERTEBRATE FAUNA; SPECIES TRAITS; FRAMEWORK; HABITAT; FLOW; HYDROPEAKING; BIODIVERSITY; CONSTRAINTS; HISTORY; QUALITY;
D O I
10.3390/w16070989
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Of all the environmental elements that influence the biological communities of rivers, water flow characteristics are undoubtedly the most important. Unfortunately, natural hydrological characteristics are increasingly threatened by human activities, especially in alpine or high mountain areas where there are numerous hydropower plants. In this study, we analysed the impact of hydrological alterations on the macroinvertebrate community of a lowland river in NW Italy. Specifically, we analysed the macroinvertebrate communities of an unaffected site by comparing them with those of a site subject to hydrological alteration. We adopted an approach that is not only taxonomic but also functional, allowing us to study a component of biodiversity that is generally less known. Our results show that the flow-altered site hosted a benthic community with lower species and functional diversity than the control site. Interestingly, we also detected a number of significant differences between the summer and autumn samples. In particular, examination of community-weighted mean (CWM) trait values reveals significant variation in body size, voltinism, substrate, locomotion, feeding habits and other traits between sites and seasons. The integration of taxonomic and functional approaches provides a comprehensive understanding of how human-induced hydrological variations can affect aquatic biodiversity and ecological functions.
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页数:15
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