Despite their crucial roles in transporting primary productions in marine food webs, the trophic dynamics of zooplankton throughout the seasons have rarely been studied. In this study, four dominant zooplankton taxa with phytoplankton size composition and productivity were collected over four seasons in the East Sea, which is known to change more rapidly than global trends. We then analyzed the delta C-13 and delta N-15 values and fatty acid composition of zooplankton. The heavy delta C-13 values in February and August 2021 were observed with high concentrations of total chlorophyll-a, and the delta C-13 differences among the four zooplankton taxa in the coastal region (site 105-05) were most pronounced in February 2021. The relative amounts of eicosapentaenoic acid (C20:5(n-3)) and docosahexaenoic acid (C22:6(n-3)), indicators of phytoplankton nutritional quality, were also highest in February 2021. Non-metric multivariate analyses showed dissimilarity among zooplankton taxa during the high productivity period based on chlorophyll-a concentrations (51.6%), which may be due to an increase in available foods during the highly productive season. In conclusion, the dietary intake of zooplankton can be reduced by the transition of phytoplankton, which has important implications for the impact of climate change on planktonic ecosystems in the East Sea.
机构:
E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China
E China Normal Univ, Dept Environm Sci, Shanghai 200062, Peoples R ChinaE China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China
Ying, Cui
Ying, Wu
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E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R ChinaE China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China
Ying, Wu
Jing, Zhang
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E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R ChinaE China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China
Jing, Zhang
Na, Wang
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E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R ChinaE China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China
机构:
Seoul Natl Univ, Res Inst Oceanog, Seoul 08826, South KoreaSeoul Natl Univ, Res Inst Oceanog, Seoul 08826, South Korea
Ko, Ah-Ra
Ju, Se-Jong
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KIOST, Deep Sea & Seabed Mineral Resources Res Div, Ansan 15627, South Korea
Univ Sci & Technol, Daejeon 34113, South KoreaSeoul Natl Univ, Res Inst Oceanog, Seoul 08826, South Korea
Ju, Se-Jong
Choi, Seok-Gwan
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Natl Inst Fisheries Sci, Distant Water Fisheries Resources Div, Busan 46083, South KoreaSeoul Natl Univ, Res Inst Oceanog, Seoul 08826, South Korea
Choi, Seok-Gwan
Shin, Kyung-Hoon
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Hanyang Univ, Dept Marine Sci & Convergent Technol, Coll Sci & Technol, Ansan 15588, South KoreaSeoul Natl Univ, Res Inst Oceanog, Seoul 08826, South Korea