생태와 환경 Vol. 51 No. 1 (p.29-39)

|Reviews|
소양호 동물플랑크톤 군집의 장기변동과 환경요인: 2003~2014

Long Term Variations and Environment Factors of Zooplankton Community in Lake Soyang.
키워드 :
zooplankton,long-term variation,environment factors,Lake Soyang

목차

Abstract
서 론
재료 및 방법
  1. 조사지 개요 및 환경요인
  2. 동물플랑크톤 채집 및 탄소량 산정
결 과
  1. 환경요인 분석
  2. 동물플랑크톤의 종 조성
고 찰
적 요
REFERENCES

초록

Long-term variation of zooplankton community and species composition was studied from 2003 to 2014 in a deep reservoir, Lake Soyang, in monsoon climate region, Korea. In addition, we examined the correlation with environmental factors. Annual precipitation of watershed showed a large variation in the 705~1,779 mm yr-1 and more than 70% of it was being concentrated from June to September. The water quality of Lake Soyang was shown a clearly seasonal variations and particularly turbid water flowing into the lake during rainy season was the most important environmental factors. Zooplankton community in Lake Soyang showed a significant difference before and after 2006. Zooplankton biomass has shown a large increase and also showed a change in the zooplankton community structure since 2006. The of zooplankton showed positive correlation with temperature and BOD, Chl. a, TP concentration. These results are considered that nutrient and organic matter contained in the turbid water influences the increase in zooplankton biomass and species composition. However, water quality was limited to account for the increase in biomass of zooplankton. For example, increase of small zooplankton density (rotifer; Keratella cochlearis, Polyarthra vulgaris) in spring which is dominated by diatoms (large size; Melosira, Synedra etc.) is considered as a bottom-up effect by the microbial loop. And increased density of crustaceans in autumn was considered a top-down effects by the relationship between predator and prey of microzooplankton and mesozooplankton. In other words the inflow of allochthonous organic matter during rainy season also affected to zooplankton food web in Lake Soyang. In conclusion, biomass, diversity and long-term variations of zooplankton in Lake Soyang were determined by physico-chemical factors but also it is considered that biological interactions is important.