For four times, zooplankton collection were conducted seasonally in October 2015- July 2016 at five sites located in the wet lands of the lower Han River, ie., Si-am, Sung-dong, Gong-reung stream, San-nam and Jang-hang. A total of 46 species of zooplankton were collected, which comprise 25 species of rotifers, seven cladocerans, ten copepods, and one species of nematod, ostracod and decapod, respectively. No brackish and marine species were distributed except for two species of brackish water copepods. Prosperity in the species number of 15 species was observed in October at Sung-dong and Jang-hang. The maximum abundance was recorded in March at Si-am with 8,000 indiv. L-1 with the explosion of Brachionus calyciflorus. Other sites also showed high abundances in March with the abundance higher than 5,000 indiv. L-1. Except in March, the abundance levels were recorded as less than some hundred indiv. L-1 throughout the study. Species diversity varied between 0.4-1.8. The gut contents of the copepodite showed that various diatoms might be their major food items, and lots of unidentified materials were also observed. The environmental conditions of water temperature, pH and dissolved oxygen content showed to vary 10.1-28.2°C, 7.1-8.6 and 4.5-11.0 mg L-1, respectively.

서 론
 재료 및 방 법
  1. 조사지 개황
 결 과
 고 찰
 적 요
 REFERENCES

• 김세화(용인대학교 생명과학과, Department of Biological Science, College of Environmental Sciences, Yong In University) | Saywa Kim Corresponding author