녹조대발생종 솜대마디말(Cladophora albida)의 유주자 방출과 초기생장에 환경요인이 미치는 영향
Effects of Environmental Factors on Zoospore Release and Early Growth of the Green Tide Alga Cladophora albida
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We examined the effects of environmental factors on zoospore release and germling growth of the green tide alga Cladophora albida under various conditions of temperature×irradiance (zoospore release), temperature×irradiance× nutrient (germling growth), and a single factor test of salinity. Zoospore release was maximized at 30℃ and 100 μmol photons m-2s-1 in the temperature·irradiance experiment and at 34 psu in the salinity experiment. Maximum germling growth was observed at 25℃ with 100 μmol photons m-2s-1 and PES (Provasoli’s Enriched Seawater) in the temperature·irradiance·nutrient experiment, and at 34 psu in the salinity experiment. Germlings grew faster at higher irradiances for a given temperature level, and also grew faster as salinity increased over the range of 5-34 psu. Overall, optimal environmental conditions for zoospore release were 30℃, 100 μmol photons m-2s-1 and 34 psu. Maximal germling growth occurred at 25℃, 100 μmol photons m-2s-1, PES, and 34 psu. C. albida blooms are most likely to occur under these optimal environmental conditions, as plentiful zoospore release and rapid germling growth lead to population growth.
Abstract
We examined the effects of environmental factors on zoospore release and germling growth of the green tide alga Cladophora albida under various conditions of temperature×irradiance (zoospore release), temperature×irradiance× nutrient (germling growth), and a single factor test of salinity. Zoospore release was maximized at 30℃ and 100 μmol photons m-2s-1 in the temperature·irradiance experiment and at 34 psu in the salinity experiment. Maximum germling growth was observed at 25℃ with 100 μmol photons m-2s-1 and PES (Provasoli’s Enriched Seawater) in the temperature·irradiance·nutrient experiment, and at 34 psu in the salinity experiment. Germlings grew faster at higher irradiances for a given temperature level, and also grew faster as salinity increased over the range of 5-34 psu. Overall, optimal environmental conditions for zoospore release were 30℃, 100 μmol photons m-2s-1 and 34 psu. Maximal germling growth occurred at 25℃, 100 μmol photons m-2s-1, PES, and 34 psu. C. albida blooms are most likely to occur under these optimal environmental conditions, as plentiful zoospore release and rapid germling growth lead to population growth.
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