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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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-11-01
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| Series: | Progress in Earth and Planetary Science |
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| Online Access: | https://doi.org/10.1186/s40645-021-00456-1 |
| _version_ | 1818683424834060288 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-17T10:34:31Z |
| format | Article |
| id | doaj.art-589d5ca2b38444189317ee17ecf92398 |
| institution | Directory Open Access Journal |
| issn | 2197-4284 |
| language | English |
| last_indexed | 2024-12-17T10:34:31Z |
| publishDate | 2021-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Progress in Earth and Planetary Science |
| spelling | doaj.art-589d5ca2b38444189317ee17ecf923982022-12-21T21:52:26ZengSpringerOpenProgress in Earth and Planetary Science2197-42842021-11-018111710.1186/s40645-021-00456-1Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblagesKeiko Shirota0Yusuke Okazaki1Susumu Konno2Yosuke Miyairi3Yusuke Yokoyama4Yoshimi Kubota5Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu UniversityDepartment of Earth and Planetary Sciences, Graduate School of Science, Kyushu UniversityMarine Works Japan LtdAtmosphere and Ocean Research Institute, The University of TokyoAtmosphere and Ocean Research Institute, The University of TokyoNational Museum of Nature and ScienceAbstract 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.https://doi.org/10.1186/s40645-021-00456-1DiatomsEast China SeaSediment coreLast Glacial MaximumHoloceneWater mass |
| spellingShingle | 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 Progress in Earth and Planetary Science Diatoms East China Sea Sediment core Last Glacial Maximum Holocene Water mass |
| title | 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_short | 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 |
| topic | Diatoms East China Sea Sediment core Last Glacial Maximum Holocene Water mass |
| url | https://doi.org/10.1186/s40645-021-00456-1 |
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