| Title |
Community Structure of Benthic Macroinvertebrates in an Urban Stream with a Reservoir |
| Authors |
김필재 ( Piljae Kim ) ; 김진영 ( Jin Young Kim ) ; 공동수 ( Dong Soo Kong ) |
| Keywords |
Benthic macroinvertebrates; Biotic indices; Gwanggyo reservoir; Suwon Stream |
| Abstract |
The Suwon stream which consists of a mountainous reach, an artificial reservoir and an urban reach provides benthic macroinvertebrates with various habitats. This study was conducted to find out the influence of reservor sluice control and water quality on benthic macroinvertebrates community in the Suwon stream from June to August, 2011. As a result, substrate composition showed little difference between the upper site (S2) and the lower site of the reservoir (S3). At site S3, water velocity was fastest, and water temperature was lowest due to the intermediate depth discharge of the reservoir. Cheumatopsyche brevilineata which prefer fast water velocity was dominant at site S3. Some biotic indices (H, J, and R) of site S3 decreased significantly whereas Benthic Macroinvertebrate Index (BMI) showed little difference between site S2 and site S3. EPT showed a negative correlation with water temperature. The sluice control of the reservoir leaded variations of water velocity and temperature, and seemed to make the state of aquatic ecosystem worse. |