Short-term effects of instream habitat restoration on macroinvertebrates and a comparison of sampling approaches

摘要: Abstract Many streams and rivers worldwide are restored with the intention to mitigate degradation caused by human activities, but these rehabilitation projects often involve physical instream work diggers or other heavy machinery. The short-term effects of such restoration works on stream ecosystems rarely investigated. primary aim our study was assess (which likely increased fine sediment load temporarily) benthic macroinvertebrate community in a lowland soft-bottomed stream, second compare results semi-quantitative kick-net quantitative Surber sampling this assessment. Invertebrates were collected using two methods from three Control Impact sites, before days after recontouring banks installing woody cover features. Three seven community-level indexes suggested positive works, whereas none indicated negative effects. By contrast, 14 most common taxa negatively affected possibly due levels reducing habitat quality for taxa. These differences imply that taxon-specific invertebrate responses may be more suitable detecting impacts than metrics. Community also drought spring summer restoration, which have obscured some works. Finally, yielded similar findings metrics differed taxa, probably because sampled different microhabitats within stream. Consequently, we recommend routine monitoring communities streams, method should used.