DISTRIBUTION OF BENTHIC FORAMINIFERA IN SURFACE SEDIMENTS OF THE LIAODONG BAY AND ITS BEARING ON SEDIMENTARY ENVIRONMENTS
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摘要: 对取自辽东湾的433个表层沉积物中底栖有孔虫群落进行了定量分析,该区底栖有孔虫以广温广盐和低温种为主。运用Q型因子分析,得到4个有孔虫组合:组合Ⅰ为Elphidium magellanicum-Nonion akitaense-Buccella frigida;组合Ⅱ为Ammonia beccarii var.-Quinqueloculina akneriana;组合Ⅲ为Cribrononion vitreum-Buccella frigida-Protelphidium tuberculatum;组合Ⅳ为Ammoina annectens-Buccella frigida,揭示了有孔虫群落组合与沉积环境之间的关系。该区底栖有孔虫的分布主要受到温度、盐度、底质类型及沿岸流的共同影响。Abstract: A total of 433 samples obtained from surface sediments of the Liaodong Bay were analyzed quantitatively. The benthic foraminifera fauna in the studied area was mainly composed of eurythermal-euryhaline and cool-water species.Based on the Q-mode factor analysis,four assemblages are recognized:I.Elphidium magellanicum-Nonion akitaense-Buccella frigida assemblage,Ⅱ.Ammonia beccarii var.-Quinqueloculina akneriana assemblage,Ⅲ.Cribrononion vitreum-Buccella frigida-Protelphidium tuberculatum assemblage,and Ⅳ.Ammoina annectens-Buccella frigida assemblage.Data suggest that the benthic foraminiferal distribution is closely related to the sedimentary environments under the control of temperature, salinity,sediment type and alongshore currents.
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Key words:
- benthic foraminifera /
- sedimentary environments /
- Liaodong Bay
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