Taxonomic and functional responses of macroinvertebrate communities to dam construction in a non-wadeable river

被引:3
|
作者
Bo, Tiziano [1 ]
Doretto, Alberto [2 ,3 ]
Marino, Anna [3 ,4 ]
Laini, Alex [4 ]
Candiotto, Alessandro [1 ]
机构
[1] Naturastaff, Via Lunga 11, I-14040 Mongardino, Italy
[2] Univ Piemonte Orientale, DiSSTE, Piazza S Eusebio 5, I-13100 Vercelli, Italy
[3] Alpine Stream Res Ctr, ALPSTREAM, I-12030 Ostana, Italy
[4] Univ Turin, DBIOS, Via Acad Albertina 13, I-10123 Turin, Italy
关键词
Biomonitoring; river ecology; diversity; Community-Weighted Mean (CWM); functional traits; IMPACT;
D O I
10.1051/kmae/2023015
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Damming and impoundment are among the main flow-related alterations in rivers worldwide. However, compared to the highland river sections where the impacts associated with dams have been largely studied, still scarce evidence is available in scientific literature for large, lowland rivers. In this study, the ecological effects of a hydropower dam in the Po River (Italy) on the taxonomic and functional responses of benthic macroinvertebrates were examined by comparing one station upstream of the dam with one downstream station over a six-year period. Weak and not significant differences were observed for taxon richness, abundance and community composition. By contrast, community-level proportion of macroinvertebrates associated with water velocity increased during medium and high flow condition and decreased during low flow condition in downstream stations. Such differences were also mirrored by the Flow-T index, that is a biomonitoring index recently developed to assess hydraulic conditions in rivers. Results of this study support the adoption of stressor-specific metrics in river biomonitoring.
引用
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页数:7
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