소양호 원생생물과 동물플랑크톤간의 먹이망 동태

김난영1, 손주연2, 공동수2, 황순진1
Nan-Young KIM1, Ju-Yeon SON2, Dong-Soo KONG2, Soon-Jin HWANG1
Author Information & Copyright
1건국대학교 환경과학과
1Department of Environmental Science, Konkuk University
2Han River Environment Research Center

ⓒ Copyright 2007 Korean Association for Conservation of Nature. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Published Online: Sep 30, 2007


To clarify the role of protozoans in the microbial food web of Lake Soyang ecosystem, the clearance rate(CR) and carbon flux(C-flux) of zooplankton assemblage were investigated. Zooplankton were divided into two size groups(microzooplankton (MICZ): 60~200 μm, macrozooplankton (MACZ): >200μm). Conducted were both quantitative trophic linkage between protist and zooplankton community structure at two sites with different trophic status from April to December, 2006. In carbon flux from protist to zooplankton, and annual range of food contribution to microzooplankton were between 0.0003 in June and 0.0087 μgC․L—1․h—1 in September, whereas they contributed to macrozooplankton between 0.0423 in December and 1.0823 μgC․L—1․h—1 in September, respectively. In highlight of sampling time and station, carbon fluxes of protist to macrozooplankton was higher than microzooplankton in both two stations, the front of Dan and Yanggu bridge station. The magnitude of carbon flux between protist and zooplankton in the front of Dam station was relatively high in spring and summer, while that in Yanggu bridge was high in autumn and winter, respectively. Comparing the carbon flux between phytoplankton and protist to their same predator, micro- and macrozooplankton, four times(April, May, October and November) of total seven samplings carried out in the front of Dam station and four times(April, May, October and November) of total eight samplings were relatively high in protist. Therefore, these results indicated that protist was important prey of zooplankton(micro- and macrozooplankton) in Soyang lake.

Keywords: C-flux; trophic dinamics; protist; zooplankton; Lake Soyang