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The distinct characteristics of phytoplankton growth response and their community structure following seven different nutrients addition in spring season of Jinhae Bay
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 Title & Authors
The distinct characteristics of phytoplankton growth response and their community structure following seven different nutrients addition in spring season of Jinhae Bay
Son, Moonho; Baek, Seung Ho;
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In order to estimate the characteristics of the growth and composition of phytoplankton according to the available nutrients, we added nitrate (0, 1, 5, 10, 20, 50, ) and phosphate (0, 0.1, 0.5, 1, 2, 5, ) to field samples in a eutrophic site (St. 1) and an oligotrophic site (St. 22) in 2010 as well as a eutrophic site (St. 1, 5), a mesotrophic site (St. 19), and an oligotrophic site (St. 22) in 2011 at Jinhae Bay, Korea. The phytoplankton growth in the areas with additional nitrates and phosphates on St. 1 were significantly different from the control (One-way ANOVA:P<0.01). The dominant species at St. 1 in 2010 were Heterocapsa triquetra and Pseudo-nitzchia spp., to which nitrate and phosphate were added, respectively. The dominant species at St. 22 in 2010 differed between treatment conditions as follows: nitrate treatment Chaetoceros spp. (), Thalassiosira spp. (), and Pseudo-nitzchia spp.() for nitrate treatment; Cylindrotheca spp. () and Pseudo-nitzchia spp. () for phosphate treatment. Phytoplankton growth in 2011 according to the added nutrient were significantly different with treatment concentrations (One-way ANOVA: P<0.01). Moreover, the beginning of exponential growth in phytoplanktons was different between the eutro-mesotrophic sites (St. 1, 5, and 19) and the oligotrophic sites (St. 22) on day 2 and day 6 respectively. This implies that phytoplankton growth in the low nutrient condition may be retarded. The dominant species at St. 1 were Eucampia spp. and Chaetoceros spp. in the low nutrient treatment compared to Skeletonema spp., and Thalassiosira spp in the high nutrient treatment. The dominant species at St. 5 and St. 19 were mostly Skeletonema spp. and Chaetoceros spp. However, the dominant species at St. 22 was Thalassiosira spp.. The results of this study showed that phytoplankton growth and composition were different in areas with different nutrient characteristics resulting from the additional nutrients. Therefore, the nutrients additional algal assay could be indirectly explained why the biomass and composition of phytoplankton in Jinhae Bay has shown spatial differences.
phytoplankton;nutrients;growth rate;Jinhae Bay;
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메소코즘에서 USCG phase-II 형식승인 대비 영양염 첨가에 따른 식물플랑크톤 대량 배양조건 확립 및 군집구조의 단주기변화,백승호;이민지;신경순;

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