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 co...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.展开更多
Islands are special regional units with unique development models and pathways and because of their locations, resources and environmental advantages, play an important role in the process of national modernization. H...Islands are special regional units with unique development models and pathways and because of their locations, resources and environmental advantages, play an important role in the process of national modernization. Here, industrial coefifcient variation and shift-share methods were used to explain the evolution of island county economies and the competitiveness of their industrial structures. We found that industrial structures in island counties have undergone a complex evolution, have not followed a pure levo-rotation mode or dextro-rotation mode, and have experienced mixed evolutionary modes. The industrial structures in island counties are relatively simple, and the evolution of industrial structures in island counties has an apparent leaping feature. Last, the economic development of 12 focal island counties were divided into ifve categories in accordance with analysis of their economic development：Competitiveness Strengthened and Structure Optimized;Competitiveness Strengthened but Structure Declined; Competitiveness Weakened but Structure Optimized; Competitiveness Weakened and Structure Declined;and Structure Relatively Stabilized.展开更多
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
文摘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.
基金National Natural Science Foundation of China(41130748)
文摘Islands are special regional units with unique development models and pathways and because of their locations, resources and environmental advantages, play an important role in the process of national modernization. Here, industrial coefifcient variation and shift-share methods were used to explain the evolution of island county economies and the competitiveness of their industrial structures. We found that industrial structures in island counties have undergone a complex evolution, have not followed a pure levo-rotation mode or dextro-rotation mode, and have experienced mixed evolutionary modes. The industrial structures in island counties are relatively simple, and the evolution of industrial structures in island counties has an apparent leaping feature. Last, the economic development of 12 focal island counties were divided into ifve categories in accordance with analysis of their economic development：Competitiveness Strengthened and Structure Optimized;Competitiveness Strengthened but Structure Declined; Competitiveness Weakened but Structure Optimized; Competitiveness Weakened and Structure Declined;and Structure Relatively Stabilized.
