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RESPONSES OF MACROINVERTEBRATE COMMUNITIES TO RIVER RESTORATION
BibTeX
@MISC{Channelized_responsesof,
author = {In A Channelized and Segment Of and The Shibetsu River and Northern Japan},
title = {RESPONSES OF MACROINVERTEBRATE COMMUNITIES TO RIVER RESTORATION},
year = {}
}
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Abstract
The effects of restoration of channel meandering and the installation of groynes on physical variables and river-dwelling macroinvertebrates were examined in a lowland river, the Shibetsu River in northern Japan. The lowland segment of the Shibetsu River, which previously meandered, had been straightened by channelization and groynes had been installed in some portions of the channelized reach. In 2002, the channelization works were partly reversed to improve the degraded river ecosystem. Physical environment variables and the macroinvertebrate community structure and composition were compared among the reconstructed meander and channelized reaches, with and without groynes. The shear stress of the river edge in the reconstructed meander and groyne reaches was lower than that in the channelized reach. In addition, the edge habitat near the stream bank in the reconstructed meander and groyne reaches had a higher total density and taxon richness of macroinvertebrates compared with the channelized reach. Restoration provided a relatively stable edge habitat, contributing to the recovery of the macroinvertebrate
Keyphrases
channelized reach response macroinvertebrate community river restoration reconstructed meander groyne reach shibetsu river physical variable lowland segment total density channel meandering lowland river physical environment variable stream bank stable edge habitat taxon richness degraded river ecosystem river edge river-dwelling macroinvertebrates macroinvertebrate community structure northern japan edge habitat shear stress
