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Biomarker Records of Phytoplankton Productivity and Community Structure Changes During the Last 14000 Years in the Mud Area Southwest off Cheju Island, East China Sea

ISSN号：1672-5182
期刊名称：《中国海洋大学学报：英文版》
时间：0
分类：P618.130.1[天文地球—矿床学;天文地球—地质学] S812.8[农业科学—草业科学;农业科学—畜牧学;农业科学—畜牧兽医]
作者机构：[1]Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China), Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, P. R. China, [2]Institute of Marine Organic Geochemistry, Ocean University of China, Qingdao 266100, P. R. China, [3]CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, P. R. China
相关基金：supported by the National Basic Research Program of China (973 Program 2010CB428901);the National Natural Science Foundation of China (Grant Nos.41020164005,41221004);the ‘111’ Project

作者： YUAN Zineng[1,2], XING Lei[1,2], LI Li[1,2], ZHANG Hailong[1,2], XIANG Rong[3], ZHAO Meixun[1,2]

关键词：生物标志物, 植物生产力, 东中国海, 济州岛, 群落结构, 海平面上升, 南区, 黑潮入侵, biomarker, East China Sea, productivity, community structure, TMBR, BIT

中文摘要：

The ecological environment in the East China Sea(ECS)and the Yellow Sea(YS)has changed significantly due to sea-level rising and the Kuroshio incursion since the last deglaciation.In this study,biomarker records of core F10B from the mud area southwest off Cheju Island(MSWCI)were generated to evaluate phytoplankton productivity and community structure changes in response to environmental evolution during the last 14 kyr.The contents of diatom,dinoflagellate and haptophyte biomarkers(brassicasterol,dinosterol and C37alkenones)display similar trends,with increasing phytoplankton productivity during the last 14kyr due to the increased influences of the Kuroshio,and especially due to the eddy-induced upwelling during the late Holocene.On the other hand,the contents of terrestrial biomarkers(C28+C30+C32n-alkanols)and terrestrial organic matter(TOM)proxies(TMBR′and BIT)all reveal decreasing TOM input into the area around the sampling site for the 14 kyr,mostly due to sea-level ris-ing.Phytoplankton biomarker ratios reveal a shift from a haptophyte-dominated community at 6.2 2.5 kyr BP to a diatom-dominated community at 2.5 1.45 kyr BP,likely caused by a stronger cold eddy circulation system at 2.5 1.45 kyr BP in the MSWCI.

英文摘要：

The ecological environment in the East China Sea （ECS） and the Yellow Sea （YS） has changed significantly due to sea-level rising and the Kuroshio incursion since the last deglaciation. In this study, biomarker records of core F10B from the mud area southwest off Cheju Island （MSWCI） were generated to evaluate phytoplankton productivity and community structure changes in response to environmental evolution during the last 14kyr. The contents of diatom, dinoflagellate and haptophyte biomarkers （brassicasterol, dinosterol and C37 alkenones） display similar trends, with increasing phytoplankton productivity during the last 14 kyr due to the increased influences of the Kuroshio, and especially due to the eddy-induced upwelling during the late Holocene. On the other hand, the contents of terrestrial biomarkers （C28 ＋C30 ＋C32 n-alkanols） and terrestrial organic matter （TOM） proxies （TMBR＇ and BIT） all reveal decreasing TOM input into the area around the sampling site for the 14kyr, mostly due to sea-level rising. Phytoplankton biomarker ratios reveal a shift from a haptophyte-dominated community at 6.2-2.5 kyrBP to a diatom-dominated community at 2.5-1.45 kyr BP, likely caused by a stronger cold eddy circulation system at 2.5-1.45 kyrBP in the MSWCI.