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- P-ISSN2287-8327
- E-ISSN2288-1220
- SCOPUS, KCI
ISSN : 2287-8327
Changes in Benthic Macroinvertebrate Communities in Response to Natural Disturbances in a Stream
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Abstract
Benthic macroinvertebrate communities were collected from six different sites in the Dobong Stream in Seoul, Korea to investigate spatial and temporal changes in benthic macroinvertebrate communities in response to natural isturbances such as floods and droughts. We collected samples monthly or semimonthly with a Surber net (30 cm × 30 cm), and measured environmental factors, including stream temperature, discharge, width, conductivity, dissolved oxygen and pH at each sampling site. Benthic macroinvertebrates were strongly affected by floods as well as droughts. In addition, benthic macroinvertebrate communities displayed different responses to the onset of the rainy season in summer 2006 and 2007, apparently due to differences in the inten-sity and amount of precipitation. Chironomids were particularly sensitive to heavy rain. Floods and droughts also affected the proportions of functional feeding groups during the survey period: the proportion of scrapers was high right after heavy rains, while the proportion of predators tended to increase in intermittent-type streams as the riffle zone decreased. Finally, although species richness and abundance were strongly influenced by heavy rain, they recovered to background levels for within one month, and varied consistently among stream types, indicating habitat stability.
- keywords
- Benthic macroinvertebrates, Community, Disturbance, Functional feeding groups, Heavy rain, Stream, Benthic macroinvertebrates, Community, Disturbance, Functional feeding groups, Heavy rain, Stream
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