| Title |
Estimation on the Physical Habitat Suitability of Benthic Macroinvertebrates in the Gapyeong Stream |
| Authors |
공동수 ( Dongsoo Kong ) ; 김아름 ( Ah Reum Kim ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.3.311 |
| Keywords |
Benthic macroin vertebrates; Environmental flow; Gapyeong stream; Habitat Suitability Index |
| Abstract |
A habitat suitability index (HSI) was developed using three physical habitat factors (current velocity, water depth and substrate) based on ecological monitoring of 17 benthic macroinvertebrate taxa in a Korean stream (Gapyeong). The Weibull model was used as a probability density function to analyze the distribution of individual abundance in relationto physical factors. Numbers of species and total individual abundance increased with increasing current velocity and mean diameter of substrate, and decreased with increasing water depth. Most taxa showed a clear preference for a fast current velocity, shallow water depth and coarse substrate, except Ephemem，Potamanthidae (mayfly), and Plectrocnemia (caddisfly), which were rheophobic, potamophilic and lithophobious. Based on the canonical correspondence analysis, the relative importance of each factor was determined as follows: current velocity > substrate > water depth. |