TY - JOUR
T1 - Analysis and prediction of the spatial distribution of EPT (Ephemeroptera, Plecoptera, and Trichoptera) assemblages in the Han River watershed in Korea
AU - Chun, Seung Phil
AU - Jun, Young Chul
AU - Kim, Hong Geun
AU - Lee, Woo Kyun
AU - Kim, Myoung Chul
AU - Chun, Seung Hoon
AU - Jung, Sung Eun
N1 - Funding Information:
This study was performed as part of the Ministry of Environment and the National Institute of Environmental Research of Korea's ‘National Aquatic Ecosystem Health Survey and Assessment in Korea’ project and was supported by a grant (11 Technical Innovation C06) from the Advanced Management Research Program funded by the Ministry of Land, Infrastructure and Transport, Korea.
Publisher Copyright:
© 2017 Korean Society of Applied Entomology, Taiwan Entomological Society and Malaysian Plant Protection Society
PY - 2017/6/1
Y1 - 2017/6/1
N2 - Understanding the relationships between environmental factors and aquatic communities at the large scale is important for conserving freshwater biodiversity and sustaining ecological integrity. In this study, we evaluated the ecological status of the Han River watershed in Korea with the predictive distribution maps for EPT (Ephemeroptera, Plecoptera, and Trichoptera) taxa. From large-scale surveys, environmental and biological data for 360 sites in 189 streams and rivers in the Han River watershed in 2012 and 2013 were analyzed. Based on correlation analysis and stepwise multiple regression analysis, the factors influencing EPT richness were altitude, percent of coarse substrate, biochemical oxygen demand (BOD), and total phosphorus (TP). DPI (distribution prediction index), indicating the distribution probability of EPT assemblages, was calculated by using a frequency ratio model. This index was high in the mountainous area where altitude and percent of coarse substrate were high, but low in the urbanized area where BOD and TP were high. Verification of the model indicated high reliability of DPIs as demonstrated by the low root-mean-square-error (RMSE) values between the predicted and observed values. This study provides a basis for the sustainable management of stream ecosystems as well as paves the way for future studies such as those on environmental assessment techniques using aquatic insect communities.
AB - Understanding the relationships between environmental factors and aquatic communities at the large scale is important for conserving freshwater biodiversity and sustaining ecological integrity. In this study, we evaluated the ecological status of the Han River watershed in Korea with the predictive distribution maps for EPT (Ephemeroptera, Plecoptera, and Trichoptera) taxa. From large-scale surveys, environmental and biological data for 360 sites in 189 streams and rivers in the Han River watershed in 2012 and 2013 were analyzed. Based on correlation analysis and stepwise multiple regression analysis, the factors influencing EPT richness were altitude, percent of coarse substrate, biochemical oxygen demand (BOD), and total phosphorus (TP). DPI (distribution prediction index), indicating the distribution probability of EPT assemblages, was calculated by using a frequency ratio model. This index was high in the mountainous area where altitude and percent of coarse substrate were high, but low in the urbanized area where BOD and TP were high. Verification of the model indicated high reliability of DPIs as demonstrated by the low root-mean-square-error (RMSE) values between the predicted and observed values. This study provides a basis for the sustainable management of stream ecosystems as well as paves the way for future studies such as those on environmental assessment techniques using aquatic insect communities.
KW - Aquatic insect
KW - EPT assemblage
KW - Frequency ratio model
KW - Geographic information system
KW - Spatial distribution
UR - http://www.scopus.com/inward/record.url?scp=85017166066&partnerID=8YFLogxK
U2 - 10.1016/j.aspen.2017.03.024
DO - 10.1016/j.aspen.2017.03.024
M3 - Article
AN - SCOPUS:85017166066
SN - 1226-8615
VL - 20
SP - 613
EP - 625
JO - Journal of Asia-Pacific Entomology
JF - Journal of Asia-Pacific Entomology
IS - 2
ER -