EUTROPHICATION OF THE MAJOR RESERVOIRS IN KOREA
スポンサーリンク
概要
- 論文の詳細を見る
Trophic state of several major reservoirs in Korea are reviewed. Most of large reservoirs are mesotrophic to eutrophic, suffering bluegreen algal blooms. Recently many reservoirs are being eutrophied at high rate mainly due to the increase of excretion by livestock in watershed and netcage-type fishfarms within the lake basins. The trophic state changes of Lake Soyang, from oligotrophy to eutrophy in recent 10 years, are presented as a case study of rapid eutrophication. Chlorophyll a concentration increased from ca. 3mg/m³ in early 1980s to 15 mg/m³ in 1989. The dominant phytoplankton species in summer are changed from Peridinium to Anabaena since 1986 and the standing crop of Anabaena has been increasing. Secchidisc depth decreased from 5 to 1m. TP increased from 7 to 20 mgP/m³. The rate of hypolimnetic oxygen deficit increased year to year from 0.028 mgO₂/cm²/day in 1986 to 0.094 in 1989. Fishfarms within the lake are the major phosphorus source in Lake Soyang exceeding the total phosphorus loading from the watershed. This high rate of eutrophication is expected to persist in next decade.
- 信州大学理学部の論文
著者
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Kim D‐s
Tokyo Metropolitan Univ. Hachiohji‐shi Jpn
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Cho K‐s
Kangwon National Univ.
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KIM Dong-Sup
Department of Biology, Faculty of Science, Tokyo Metropolitan University
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Kim Dong-sup
Department Of Biology Faculty Of Science Tokyo Metropolitan University
関連論文
- PRIMARY PRODUCTION OF PHYTOPLANKTON AND MACROPHYTES IN AN EUTROPHIC LAGOON, LAKE KYUNGPO, KOREA
- EUTROPHICATION OF THE MAJOR RESERVOIRS IN KOREA
- The effect of long wave ultraviolet radiation (UV-A) on the photosynthetic activity of natural population of freshwater phytoplankton