| Xiang Rong,Li Tiegang,Yang Zuosheng,Yan Jun,Cao Qiyuan. 2003. Benthic foraminiferal distribution in surface sediments along continental slope of the southern Okinawa Trough: dependance on water masses and food supply. Acta Oceanologica Sinica, (1):133－143 |
| Benthic foraminiferal distribution in surface sediments along continental slope of the southern Okinawa Trough: dependance on water masses and food supply |
| Benthic foraminiferal distribution in surface sediments along continental slope of the southern Okinawa Trough: dependance on water masses and food supply |
| Received:October 10, 2002 Revised:November 20, 2002 |
| DOI： |
| Key words:Benthic foraminifer southern Okinawa Trough dissolution Kuroshio food supply |
| 中文关键词: Benthic foraminifer southern Okinawa Trough dissolution Kuroshio food supply |
| 基金项目:This research was jointly supported by the National Natural Science Foundation of China under contract Nos 49736210,40176019 and 40106006,and the Post-doctoral Fund of Ocean University of Qingdao,China. |
| Author Name | Affiliation | | Xiang Rong | College of Marine Geosciences, Ocean University of China(Ocean University of Qingdao), Qingdao 266003, China
Institute of Oeanology, Chinese Academy of Sciences, Qingdao 266071, China | | Li Tiegang | Institute of Oeanology, Chinese Academy of Sciences, Qingdao 266071, China | | Yang Zuosheng | College of Marine Geosciences, Ocean University of China(Ocean University of Qingdao), Qingdao 266003, China | | Yan Jun | Institute of Oeanology, Chinese Academy of Sciences, Qingdao 266071, China | | Cao Qiyuan | Institute of Oeanology, Chinese Academy of Sciences, Qingdao 266071, China |
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| Abstract: |
| Benthic foraminiferal analysis of 29 samples in surface sediments from the southern Okinawa Trough is carried out.The results indicate that benthic foraminiferal abundance decreases rapidly with increasing water depth.Percentage frequencies of agglutinated foraminifera further confirm the modern shallow carbonate lysocline in the southern Okinawa Trough.From continental shelf edge to the bottom of Okinawa Trough,benthic foraminiferal fauna in the surface sediments can be divided into 5 assemblages:(1) Continental shelf break assemblage,dominated by Cibicides pseudoungerianus,corresponds to subsurface water mass of the Kuroshio Current;(2) upper continental slope assemblage,dominated by Cassidulina carinata,Globocassidulina subglobosa,corresponds to intermediate water mass of the Kuroshio Current;(3) intermediate continental slope assemblage,dominated by Uvigerina hispida,corresponds to the Okinawa Trough deep water mass above the carbonate lysocline. |
| 中文摘要: |
| Benthic foraminiferal analysis of 29 samples in surface sediments from the southern Okinawa Trough is carried out.The results indicate that benthic foraminiferal abundance decreases rapidly with increasing water depth.Percentage frequencies of agglutinated foraminifera further confirm the modern shallow carbonate lysocline in the southern Okinawa Trough.From continental shelf edge to the bottom of Okinawa Trough,benthic foraminiferal fauna in the surface sediments can be divided into 5 assemblages:(1) Continental shelf break assemblage,dominated by Cibicides pseudoungerianus,corresponds to subsurface water mass of the Kuroshio Current;(2) upper continental slope assemblage,dominated by Cassidulina carinata,Globocassidulina subglobosa,corresponds to intermediate water mass of the Kuroshio Current;(3) intermediate continental slope assemblage,dominated by Uvigerina hispida,corresponds to the Okinawa Trough deep water mass above the carbonate lysocline. |
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