The Summer Phytoplankton Community Structure in Lake Imha

하계 임하호에서 식물플랑크톤 군집의 구조

  • Published : 1999.03.01

Abstract

The dynamics of phytoplankton community in Lake Imha and its tributaries was investigated at nineteen stations in August and September 1996. A total of 171 taxa [171 species (including 1 forms and 27 varieties),66 genus, 25 families, 6 suborders, 13 orders and 6 class] were identified. The standing crops of phytoplankton ranged from $47.35{\times}10^3 to 184.65{\times}10^3 individuals/ml in surface layer, 1.08{\times}10^3~54.33{\times}10^3 individuals/ml in middle layer and 0.69{\times}10^3~115.85{\times}10^3individuals/ml$ in low layer. Dominant species determined by standing crops of each species were Oocystis lacustris, Elakatothrix gelatinosa, Aulacoseira ambigua, and Synedra acus, however, the most species dominated from 1992 to 1994 disappeared.

본 조사는 임하댐을 대상으로 상.중.하로 구별하여 호수내에 16개 정점, 유입하천에 3개의 정점등 모두 19개의 정점을 선정하여 1996년 8월 5일과 9월 10일에 식물플랑크톤의 군집구성, 현존량, 우점종 그리고 각 지수를 조사하였다. 본 조사에서 동정된 식물플랑크톤은 6강 13목 6아목 25과 66속 143종 27변종 1품종으로 모두 171종류였다. 현존량 변화에서 표층은 $47.350{\times}10^3 ~184.65{\times}10^3 individuals/ml, 중층은 1.08{\times}10^3~54.33{\tiems}10^3 individuals/ml, 하층은 0.69{\times}10^3~115.85{\times}10^3$ individuals/ml였다. 1992년에서 1994년의 조사에서 우점하였던 종은 거의 사라지고, Oocystis lacustris, Elakatothrix gelatinosa, Aulacoseira ambigua, Synedra acus 등의 종이 우점종으로 조사되었다.

Keywords

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