평택호에서 수환경과 식물플랑크톤의 계절적 동태 (Seasonal Dynamics of Aquatic Environment and Phytoplankton in Pyeongtaek Reservoir, Korea)

서지정보

· 발행기관 : 한국조류학회I
· 수록지 정보 : ALGAE / 18권 / 2호 / 145 ~ 156페이지
· 저자명 : 신재기

초록

Seasonal investigations were conducted to determine the major aquatic environmental factors and the variation of
phytoplankton in Pyeongtaek Reservoir in March, June, September, and December 2000. Heavy rainfall mainly
occurs from late June to mid-September, and water quality of reservoir was high in the influent zone of stream and
riverine zone of reservoir. The biomass of phytoplankton was related to aquatic environmental factors. In particular,
its value increased where nutrient concentration was high. Likewise, the increase of turbidity was found to have
anthropogenic effects on the varying quantity of phytoplankton. The phytoplankton composition in quantitative
survey identified into 43 genera and 71 species. Species numbers of Bacillariophyceae, Cyanophyceae, and
Chlorophyceae accounted for 17%, 15%, and 49%, respectively, with the remainder constituting less than 3-7%. The
distribution of such phyla also significantly varied according to seasons, accounting for 25%, 37%, 61%, and 14% in
March, June, September, and December, respectively. Bacillariophyceae and Chlorophyceae were observed throughout
the year, while Cyanophyceae proliferated in June and September. Euglenophyceae and Dinophyceae were
prevalent in March and September, while Cryptophyceae occurred in March and December. The succession trend of
phytoplankton showed the maximum cell density was followed by Bacillariophyceae (6.8×103 cells ·ml–1)→
Chlorophyceae (3.7×103 cells ·ml–1)→Cyanophyceae (1.3×104 cells ·ml–1)→Cryptophyceae (1.2×103 cells ·ml–1).
The cell density was the highest in the upstream. Dominant species were composed of Aulacoseira ambigua,
Stephanodiscus hantzschii f. tenuis of Bacillariophyceae, Anabaena spiroides var. crassa, Microcystis aeruginosa,
Oscillatoria amphibia of Cyanophyceae, Actinastrum hantzschii var. fluviatile, Pediastrum duplex var. reticulatum of
Chlorophyceae, Euglena gracilis, Trachelomonas spp. of Euglenophyceae, and Chroomonas spp., Cryptomonas spp. of
Cryptophyceae. As a results, seasonal variation of phytoplankton in Pyeongtaek Reservoir was evident in spite of
inflow the high concentration of nutrients from watershed streams, because hydrological control and anthropogenic
disturbance in reservoir were found to have major effects on the retention time of water.

영어초록

Seasonal investigations were conducted to determine the major aquatic environmental factors and the variation of
phytoplankton in Pyeongtaek Reservoir in March, June, September, and December 2000. Heavy rainfall mainly
occurs from late June to mid-September, and water quality of reservoir was high in the influent zone of stream and
riverine zone of reservoir. The biomass of phytoplankton was related to aquatic environmental factors. In particular,
its value increased where nutrient concentration was high. Likewise, the increase of turbidity was found to have
anthropogenic effects on the varying quantity of phytoplankton. The phytoplankton composition in quantitative
survey identified into 43 genera and 71 species. Species numbers of Bacillariophyceae, Cyanophyceae, and
Chlorophyceae accounted for 17%, 15%, and 49%, respectively, with the remainder constituting less than 3-7%. The
distribution of such phyla also significantly varied according to seasons, accounting for 25%, 37%, 61%, and 14% in
March, June, September, and December, respectively. Bacillariophyceae and Chlorophyceae were observed throughout
the year, while Cyanophyceae proliferated in June and September. Euglenophyceae and Dinophyceae were
prevalent in March and September, while Cryptophyceae occurred in March and December. The succession trend of
phytoplankton showed the maximum cell density was followed by Bacillariophyceae (6.8×103 cells ·ml–1)→
Chlorophyceae (3.7×103 cells ·ml–1)→Cyanophyceae (1.3×104 cells ·ml–1)→Cryptophyceae (1.2×103 cells ·ml–1).
The cell density was the highest in the upstream. Dominant species were composed of Aulacoseira ambigua,
Stephanodiscus hantzschii f. tenuis of Bacillariophyceae, Anabaena spiroides var. crassa, Microcystis aeruginosa,
Oscillatoria amphibia of Cyanophyceae, Actinastrum hantzschii var. fluviatile, Pediastrum duplex var. reticulatum of
Chlorophyceae, Euglena gracilis, Trachelomonas spp. of Euglenophyceae, and Chroomonas spp., Cryptomonas spp. of
Cryptophyceae. As a results, seasonal variation of phytoplankton in Pyeongtaek Reservoir was evident in spite of
inflow the high concentration of nutrients from watershed streams, because hydrological control and anthropogenic
disturbance in reservoir were found to have major effects on the retention time of water.

참고자료

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