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RISS 인기검색어
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- 저자 : 문병용 ( Kyung Je Cho (검색결과 2 건)
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이진애,조경제,권오섭,정익교,문병용 ( Jin Ae Lee,Kyung Je Cho,O Seob Kwon,Ik Kyo Chung Byung Yong Moon ) 한국하천호수학회 1994 생태와 환경 Vol.27 No.1
Primary production of phrtoplankton was investigated in Naktong estuarine ecosystem monthly from October 1991 to September 1992 using carbon-14 uptake method. In spite of large spatial and temporal variation, there was a primary peak of net phytoplankton production in spring through early summer. The productivity was minimum of 543mg C·m^-2.day^-1 in September and maximum of 4112mg C·m^-2·day^-1 in April. The seasonal changes in factors regulating production in Naktong estuarine area were proposed based on the annual patterns of physical variables and nutrient concentrations. The late spring and early summer flowering of biomass and net production of phytoplankton was explained as the result of the balance between light and temperature. The high level of Production terminated in summer as the result of water clarity. Nutrient limitation may not be important, because of high nutrient level year around in this eutrophicated estuarine area.
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도시근교 하천 조만강의 (潮滿江) 식물플랑크톤 일생산성 추정
조경제,신재기,이진애,문병용 ( Kyung Je Cho,Jae Gi Shin,Jin Ae Lee,Byeong Yong Moon ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.1
Hourly photosynthetic P-I curves were used to estimate the daily production from in situ C-14 data. P^B_(max) were ranged from 1.4 to 7.5(㎍ C/㎍ chl-a/hr) and α ranged from 3.6 to 14.8[㎍ C/㎍ chl-a/(mol/m^2/hr)]. P^B_(max) and α were simultaneously high in the growing season and low in winter. α and I_k were good indicators for seasonally low-irradiance adaptation in algal photosynthesis. At surface high irradiance, photoinhibition didn`t occur and algal assimilation showed a linear or logarithmic decrease along the depth. As water transparency dropped, primary productivity per unit area didn`t increase as production per unit volume did at water surface. Daily productions were estimated from 1.5(g C/m^2/day) at January to 4.0 (g C/m^2/day) at July. The photoadaptation and lack of photoinhibition were reflected by the role of irradiance and water temperature as most significant predictors of daily algal production. Carbon contents of phytoplankton comprised of 33% of particulate organic carbon of water, turn-over rate (P/B) of phytoplankton was 0.61/day and turn-over time was 1.6 day. Choman River, a stagnant and fertilized river near Kimhae city, is characterized by high nutrient loading from the surrounding area and high autochthonous production.
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