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KMID : 1024520130220030309
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Journal of the Environmental Sciences
2013 Volume.22 No. 3 p.309 ~ p.318
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The Influence of Artificial Structures on Benthic Macroinvertebrate Communities in Streams
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Kim Bong Sung
Sim Kwang Sub
Kim Sun Hee
Kwon O-Chang
Seo Eul-Won
Lee Jong-Eun
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Abstract
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This study was conducted for determining the influence of artificial structures on benthic macroinvertebrate communities in stream. Sampling was taken at upper(pool), down(riffle) and control(riffle) from two check dams, two weirs, one agricultural reservoir, and one multipurpose dam in northern part of Gyeongsangbuk-do. The benthic macroinvertebrate communities of these structures were surveyed during 2009 to 2011. The simple habitat of benthic macroinvertebrates occurred at the upper sites due to pooling effects from artificial structures. Specifically, Check dam1, Jusanji, Imha dam showed very low biological attribute values compared to the down and control sites, which have greater difference in substrate characteristics. However, in the upper sites of Check dam2, Weir1 and Weir2, the difference of values of biological attributes was relatively smaller. Also, proportion of functional feeding groups and functional habit groups were relatively simpler at upper stream and the degree of community differences was greater between upper and down, control sites. Spearman's correlation between biological attributes and substrate characteristics, water quality parameters had significant correlations; particularly, the substrate characteristics were more significantly related. In conclusion, the pool caused by artificial structures had negative effects on benthic macroinvertebrate communities thus leading to simplified stream habitats at upper stream ecosystems.
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KEYWORD
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Artificial structure, Benthic macroinvertebrates, Community analysis, River bed
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