江苏、浙江潮间带中活体底栖有孔虫的垂向分布  

THE VERTICAL DISTRIBUTION OF LIVING(STAINED)BENTHIC FORAMINIFERA IN THE INTERTIDAL FLATS FROM JIANGSU AND ZHEJIANG PROVINCES

作　　者：俞宙菲 李保华[1,2] 王晓燕[1] 郭启梅[1] 张楷[1,3] YU Zhoufei;LI Baohua;WANG Xiaoyan;GUO Qimei;ZHANG Kai(Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008;State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Centre for Excellence in Life and Paleoenvironment,Chinese Academy of Sciences,Nanjing 210008;University of Science and Technology of China,Heifei 230026)

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]现代古生物学和地层学国家重点实验室、中国科学院生物演化与环境卓越创新中心,南京210008 [3]中国科学技术大学,合肥230026

出　　处：《微体古生物学报》2021年第4期389-396,共8页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金项目(41776073,41906058);现代古生物学和地层学国家重点实验室项目(20172110);中国科学院战略先导科技专项(XDB26000000)联合资助。

摘　　要：本文分析了自江苏海门、浙江舟山和象山沿岸三个潮间带采集的上层10cm沉积物中活体底栖有孔虫的分布情况,结果显示有孔虫群落的简单、复合分异度自表层向深层减小,在垂直分布上对环境适应性强的优势属Ammonia更容易向深分布。在表层充氧的舟山潮间带,Ammonia属的绝对丰度自表层向深处减小,但在生长水草的海门潮间带和布满贝类的象山潮间带,植物根系的驻扎和生物扰动增大了氧气向沉积物深层渗透的概率,为投机的Ammonia属的向深栖息提供了契机,使得其丰度在深部出现峰值而非表层。其他属种对环境的适应性弱,它们在三个潮间带的含量和丰度均随深度的增大而减小或消失,需氧型新陈代谢迫使其在充氧的表层丰度最大。Living benthic foraminiferal assemblage was analyzed for the upper 10cm sediment samples collected from three intertidal flats located at Haimen(Jiangsu Province),Zhoushan and Xiangshan(Zhejiang Province).The results showed that the simple and complex diversities of foraminiferal assemblage reduced with the increasing depth,and the adaptable Ammoniatended to have a deeper microhabitat compared to other species.At Zhoushan site where the topmost sediment was oxygenated,the density of Ammonia decreased with the increasing depth.However,at vegetated Haimen site and Xiangshan site where drilling animals inhabited,the seagrass root systems and bioturbation might allow the downward penetration of the oxygen,and provided an opportunity for opportunistic Ammoniato live deeper in the sediment,then the peek density of Ammoniaoccurred deeper but not at the surface.Whereas,the less tolerant other species were preferentially found in the upper 1cm of the sediment,they reduced or disappeared with the increasing depth at all three sites,the aerobiotic metabolism constrained them at the oxygenated surface.

关 键 词：底栖有孔虫 活体 潮间带 垂直分布 

分 类 号：Q915[天文地球—古生物学与地层学]