辽东湾现代沉积物中畸形底栖有孔虫及环境指示意义

DEFORMED BENTHIC FORAMINIFERA IN MODERN SEDIMENTS OF LIAODONG BAY AND ITS ENVIRONMENTAL IMPLICATIONS

摘要: 对渤海辽东湾海域10根柱状样的305个沉积物样品进行了有孔虫定量分析，共识别出畸形有孔虫8属10种。10种畸形有孔虫根据壳体形态可分为5大类，分别为房室异常、口孔异常、脐异常、绕旋异常、壳圈异常。通过对有孔虫畸形属种的畸变类型进行统计描述，一定程度上弥补了畸形有孔虫研究的不足。对比发现辽东湾海域环境污染程度由近岸向远岸逐渐递减，该特征符合人类活动对海洋环境的影响。

Abstract: A total of 305 samples acquired from 10 cores of the Liaodong Bay of the Bohai sea are quantitatively analyzed, and identified are 10 species within 8 genera of foraminifera with malformation characteristics. The species with abnormal shell forms can be categorized into 5 groups, i.e. the group with abnormal chamber, the group with abnormal aperture, the group with abnormal umbilicus, the group with abnormal coil and the group with abnormal test. The statistical descriptions of the deformed foraminiferal types would enrich the knowledge of foraminifera in the sea. This study also focuses on the comparison of different sedimentary settings in the Liaodong Bay. It shows that contamination gradually decreases from the coast to offshore, in congruent with the human impacts on the marine environments.