Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages

Abstract We investigated diatom assemblages for the last 19 ka in a piston core KY07-04 PC01 collected from the northern Okinawa Trough, East China Sea. Most of the diatom taxa in the Core KY07-04 PC01 were subtropical to temperate marine species throughout the core. Pronounced turnover of major dia...

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Autores principales:	Keiko Shirota, Yusuke Okazaki, Susumu Konno, Yosuke Miyairi, Yusuke Yokoyama, Yoshimi Kubota
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Diatoms East China Sea Sediment core Last Glacial Maximum Holocene Water mass Geography. Anthropology. Recreation G Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/589d5ca2b38444189317ee17ecf92398
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id	oai:doaj.org-article:589d5ca2b38444189317ee17ecf92398
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spelling	oai:doaj.org-article:589d5ca2b38444189317ee17ecf923982021-11-28T12:09:18ZChanges in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages10.1186/s40645-021-00456-12197-4284https://doaj.org/article/589d5ca2b38444189317ee17ecf923982021-11-01T00:00:00Zhttps://doi.org/10.1186/s40645-021-00456-1https://doaj.org/toc/2197-4284Abstract We investigated diatom assemblages for the last 19 ka in a piston core KY07-04 PC01 collected from the northern Okinawa Trough, East China Sea. Most of the diatom taxa in the Core KY07-04 PC01 were subtropical to temperate marine species throughout the core. Pronounced turnover of major diatom groups from periphytic to planktonic taxa occurred during deglaciation between 17 and 14 ka ago. During the Last Glacial Maximum (LGM) to early deglaciation, the representative taxa were Paralia spp., a periphytic diatom abundant in continental shelves of the modern East China Sea covering the Chinese Coastal Water. Relative abundances of Paralia spp. rapidly decreased during 15–14 ka ago, corresponding to sea-level rise, displaced by planktonic taxa such as Thalassionema. Thalassionema nitzschioides varieties living in subtropical water increased since 12 ka and have reached the present level at 8 ka ago, suggesting strengthening the influences of Kuroshio water in the northern East China Sea during the early to middle Holocene. Warm planktonic diatom taxa such as Nitzschia bicapitata also gradually increased from 12 to 8 ka ago. Near the core top, a sudden increase in N. bicapitata might relate to the intensifying Kuroshio during the latest Holocene.Keiko ShirotaYusuke OkazakiSusumu KonnoYosuke MiyairiYusuke YokoyamaYoshimi KubotaSpringerOpenarticleDiatomsEast China SeaSediment coreLast Glacial MaximumHoloceneWater massGeography. Anthropology. RecreationGGeologyQE1-996.5ENProgress in Earth and Planetary Science, Vol 8, Iss 1, Pp 1-17 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Diatoms East China Sea Sediment core Last Glacial Maximum Holocene Water mass Geography. Anthropology. Recreation G Geology QE1-996.5
spellingShingle	Diatoms East China Sea Sediment core Last Glacial Maximum Holocene Water mass Geography. Anthropology. Recreation G Geology QE1-996.5 Keiko Shirota Yusuke Okazaki Susumu Konno Yosuke Miyairi Yusuke Yokoyama Yoshimi Kubota Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages
description	Abstract We investigated diatom assemblages for the last 19 ka in a piston core KY07-04 PC01 collected from the northern Okinawa Trough, East China Sea. Most of the diatom taxa in the Core KY07-04 PC01 were subtropical to temperate marine species throughout the core. Pronounced turnover of major diatom groups from periphytic to planktonic taxa occurred during deglaciation between 17 and 14 ka ago. During the Last Glacial Maximum (LGM) to early deglaciation, the representative taxa were Paralia spp., a periphytic diatom abundant in continental shelves of the modern East China Sea covering the Chinese Coastal Water. Relative abundances of Paralia spp. rapidly decreased during 15–14 ka ago, corresponding to sea-level rise, displaced by planktonic taxa such as Thalassionema. Thalassionema nitzschioides varieties living in subtropical water increased since 12 ka and have reached the present level at 8 ka ago, suggesting strengthening the influences of Kuroshio water in the northern East China Sea during the early to middle Holocene. Warm planktonic diatom taxa such as Nitzschia bicapitata also gradually increased from 12 to 8 ka ago. Near the core top, a sudden increase in N. bicapitata might relate to the intensifying Kuroshio during the latest Holocene.
format	article
author	Keiko Shirota Yusuke Okazaki Susumu Konno Yosuke Miyairi Yusuke Yokoyama Yoshimi Kubota
author_facet	Keiko Shirota Yusuke Okazaki Susumu Konno Yosuke Miyairi Yusuke Yokoyama Yoshimi Kubota
author_sort	Keiko Shirota
title	Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages
title_short	Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages
title_full	Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages
title_fullStr	Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages
title_full_unstemmed	Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages
title_sort	changes in surface water masses in the northern east china sea since the last glacial maximum based on diatom assemblages
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/589d5ca2b38444189317ee17ecf92398
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Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages

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