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RISS 인기검색어
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- 저자 : 장만 ( Jin Hwan Lee (검색결과 2 건)
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제주도의 (濟州島) 담수산 (淡水産) 식물 플랑크톤 군집에 (群集) 대하여
이진환,장만 ( Jin Hwan Lee,Man Chang ) 한국하천호수학회 1991 생태와 환경 Vol.24 No.2
Species composition and standing crops of the freshwater phytoplankton communities in Backrokdam Crater, Chunjiyun Fall, Chunjeyun Fall and Jungbang Fall of Cheju Island have been studied on November 1987 and June 1990, respectively. Seventynine taxa representing 43 genera, 57 species, 10 varieties, 4 formas and 8 unidentified species were recorded. The species number observed in Chunjiyun Fall was more abundant than those of other investigated areas, otherwise that of the poorest was in Chunjeyun Fall. The size of phytoplankton standing crops were comparatively larger of 5.1∼12.O×10⁴cells/l in Backrokdam crater and Chunjiyun Fall, those of Chunjeyun Fall and Jungbang Fall were smaller of 0.2∼8.6 × 10⁴ cells/l. Influences of phytoplankton dynamics in these areas could be thought of the residual time of Fall water in pool and the effects of a various nutrients releasing from the neighbour agroecosystem. More studies are needed to varify an annual dynamics.
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한강하류의 환경학적 연구 - Ⅱ. 식물플랑크톤의 동태 -
이진환,장만 ( Jin Hwan Lee,Man Chang ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.3
This study on the seasonal dynamics of phytoplankton was conducted between June of 1995 and 1996 during the dry season at 7 stations along the lower part of the Han River. During this study, a total of 145 taxa of phytoplankton were found, including 82 diatoms, 50 green algae, 7 bluegreen algae, 3 euglenoids and 1 species each of dinoflagellate, chrysophyte and silicoflagellate. Though the seasonal fluctuations in phytoplankton standing crops were very wide and recorded a minimum of 3.2×10^5cells/ℓ(July 1995, st.3) and a maximum of 1.5x10^7cells/ℓ(June 1996, st. 3), during the flood period, excluding July, more than 10^6∼10^7 cells/ℓof annual blooms were recorded. Five representative species were recorded by all stations as appearing every month in the surveyed area including Asterionella gracillima, aulacoseira granulata, Fragilaria crotonensis, Synedra ulna and Scenedesmus longispina, Aulacoseira granulata, Fragilaria crotonensis, Synedra granulata, A. granulata var. angustissima f. spiralis, A. italica, Asterionella gracillima, Fragilaria crotonensis, Stephanodiscus hantzschii f. tenuis and Stephanodiscus parvus, it was the first dominant species, in particular, that occupied the highest ratio. Though the dominance index and the inverse proportion of the species diversity index of phytoplankton com-munities was very low, the ratio occupied by the standing crops, number of occurring species, and dominant species was accompanied by a great deal of variation in the evenness index. In addition, even though there is a direct relationship between the richness index and the total number of occurring species, if the standing crops variation is large, the richness index will show a large variation in the same number of occurring species.
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