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팔당호의 생태학적 연구 - 2. 식물플랑크톤의 군집 구조의 변화 -
한명수,어윤열,유재근,유광일,최영길 ( Myung Soo Han,Yun Yeol Auh,Jae Keun Ryu,Kwang Il Yoo,Yong Keel Choi ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.3
In order to examine the changes in phytoplankton community structure in Pal`tang river-reservoir system and to describe some of their interrelations, 4 stations were chosen. Observations were carried out for four times at the Pal`tang reservoir and the lower part of three rivers such as North Han river, South Han river and Kyung-An stream from April 1992 to May 1993 and these data were analyzed with other published data. A total of 60 taxa in phytoplankton: of these, 24 were Bacillariophyceae, 29 were Chlorophyceae, five were Dinophyceae, the other taxa as Chrysophyceae, Cryptophyceae were identified one species, respectively. Rapid eutrophication contribute to the shift of the chief components of the total phytoplankton community from Bacillariophyceae to Bacillariophyceae including Chlorophyceae. Among them, Autacoseira(=Melosira) granulata dominated continuously in this study area since 1980. Changes in Phytoplankton community structure in Station 4(Pal`tang reservoir) affected by the longitudinal transport along each river strech in Pal`tang river-reservoir system. However, Changes of phytoplankton community structure probably were affected by its growth characteristics during the stagnation period of water column. Station 3(Kyung-An Stream) is heavily eutrophicated due to stagnation of water column.
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팔당호의 생태학적 연구 4 . 경안천 하류의 영양염 및 입자태 유기물 거동과 식물플랑크톤의 천이
한명수(Myung Soo Han),홍성수(Sung Su Hong),어윤열(Yun Yeol Auh) 한국하천호수학회 2002 생태와 환경 Vol.35 No.1
In order to understand the relationship between succession of phytoplankton community structure and inorganic nutrients and particulate organic matters, a one station in Kyungan stream in Korea during the dry season was chosen. Water samplings were carried out once a week from 18 August to 13 November 1993. The DIN concentration distributed always abundantly, however, phosphate and silicate gradually reduced during the period. Phytoplankton community had a peak chlorophyll a concentration of 90.6㎍/ℓ in late summer(21 August 1993) and a second peak of 29.7㎍/ℓ in autumn(2 October 1993). After then late autumn was characterized by relatively low chlorophyll a concentration of 15∼16㎍/ℓ. Seasonal fluctuation of chlorophyll a concentrations were correlated with measured POC and PON concentrations: phytoplankton blooming may be a major factor controlling POC and PON concentrations in this ecosystem. Phosphate plays an most important role as a limiting factor of phytoplankton growth. However, when Si/P ratio low, silicate may be a more critical limiting factor than phosphate. Shifts of P-limitation to Si-limitation the succession of dominant phytoplankton can in duce: diatom to cyanobacteria such as Anabaena, Microcytis and Oscillatoria.
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