长江口低氧区底栖有孔虫组合  

BENTHIC FORAMINIFERAL ASSEMBLAGES IN THE HYPOXIC AREA OF YANGTZE RIVER ESTUARY

作　　者：蔡庆芳[1,2] 王飞飞[2] 印萍[2] 刘冬雁[1] 贾培蒙[1] 

机构地区：[1]中国海洋大学海洋地球科学学院,青岛266100 [2]青岛海洋地质研究所,青岛266071

出　　处：《海洋地质前沿》2013年第6期44-51,共8页Marine Geology Frontiers

基　　金：国土资源海洋地质专项"海陆相互作用和海岸带地质灾害研究"(GZH201100203)

摘　　要：对全球低氧区的分布、形成机制以及低氧区海水表层特征、海底地球化学特征、生物特征等进行了系统的描述。着重对全球低氧区的底栖有孔虫特征进行了分析、对比,并与长江口底栖有孔虫特征相结合,讨论适合指示长江口低氧区的底栖有孔虫组合,初步分析认为Epistominella naraensis(奈良小上口虫)、Bulimina marginata(具缘小泡虫)、Bolivina spp.(箭头虫诸种)、Florilus spp.(花朵虫诸种)、Ammonia spp.(卷转虫诸种)以及Bulliminella spp.(微泡虫诸种)为长江口低氧区的敏感种,具有低氧环境的指示意义,并可以作为古低氧事件研究的标志。但实际应用时应根据研究需要取合适的属种组合使用。In this paper, we described the spatial distribution of the hypoxic zone in the world and dis- cussed its formation mechanisms, sea surface features, and seabed geochemical and biological charac- teristics. The benthic foraminiferal assemblages found in the Yangtze River Delta were compared with those in the hypoxic areas of the world. It is found that the species of Epistominella naraensis, Bu- limina marginata, Bolivina spp. , Florilus spp. , Ammonia spp. and Bulimina spp. are sensitive species in the hypoxic zone of the Yangtze River estuary and can be used as a proxy to denote a low ox- ygen environment for study of the hypoxic events in the history. However, selection of right forami- niferal assemblages is required before environmental interpretation is made.

关 键 词：长江口 低氧区 有孔虫 低氧有孔虫组合 

分 类 号：Q915.811.1[天文地球—古生物学与地层学]