| Title |
Survey on Lake Environments in the Yeongsan and Seomjin River Basins -Based on 10 lakes such as Hadong and Sangsa- |
| Authors |
김신조 ( Shin Jo Kim ) ; 송효정 ( Hyo Jeong Song ) ; 박태진 ( Tae Jin Park ) ; 황문영 ( Moon Young Hwang ) ; 조항수 ( Hang Soo Cho ) ; 송광덕 ( Kwang Duck Song ) ; 이형진 ( Hyung Jin Lee ) ; 김영석 ( Young Suk Kim ) |
| DOI |
https://doi.org/10.15681/KSWE.2015.31.6.665 |
| Keywords |
Aquatic invertebrate; Fish; Gwangju; Large hydrophyte; Phytoplankton; Zooplankton |
| Abstract |
Yearly mean temperature in the 29 lakes surveyed ranges from 12.6 (Suncheon) to 13.9°C (Mokpo), the lowest in -2.7°C (January) and the highest in 25.9°C (July). Monthly mean the amount of rainfall recorded the highest of 336.7 mm in August and the lowest with 4.9 mm in January. A total of 424 species of phytoplankton were identified. They were 157 Chlorophyceae, 161 Bacillariophyceae, 39 Cyanophyceae, and 67 other algal taxa. The phytoplankton diversity were low in stream type reservoirs such as Guemho, Youngsan and Youngam. The population density of phytoplankton ranged from 19 to 53,161 cells/ml. Annual mean of total zooplankton abundance in 45 sites was 369±827 ind./L (n=180). Rotifers were the most common taxa and their relative abundance was high (65~77%). The benthic microinvertebrate fauna of 10 reservoirs of Jeonnam province were 71 species of 61 genera of 44 families of 16 orders of 7 classes of 4 phyla. Aquatic insects of Phylum Arthropoda were 50 species of 44 genera of 28 families of 6 orders. The number of individuals was 6,132. Diptera was highiest (41.3%), and Ephemeroptera (31.0%), Trichoptera (17.5%), Anellida (3.8%), Mollusca (3.3%), Crustacea (0.4%). Large hydrophytes were identified 32 taxa, 2 varieties 30 species 26 genera and 20 families. Especially, Jijung and Juam lakes require management such as physical remove of this ecosystem disturbance field plants. Fishes were identified total 44 taxa, such as 25 Cyprinidae (56.8%), 8 Cobitidae (17.0%), 3 Gobiidae (6.4%), 2 Bagridae (4.3%), 2 Osmeridae (4.3%), 2 Odontobutidae (4.3%), 2 Centrachidae (4.3%), 1 Siluridae (2.1%), and 1 Centropomidae (2.1%). A pale chub was dominant species (18.9%). |