黔南宾夕法尼亚亚纪礁环境中腕足动物古生态研究  

Study on palaeoecology of brachiopod fauna in Pennsylvanian reefs in southern Guizhou,China

作　　者：杨丽丽[1,2] 巩恩普[1] 关长庆[1] 刘畅[3] 张永利[1] 常洪伦[1] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110004 [2]沈阳理工大学环境与化学工程学院,沈阳110159 [3]北京林业大学生物科学与技术学院,北京100083

出　　处：《世界地质》2011年第1期1-6,共6页World Geology

基　　金：国家自然科学基金项目(40972004)

摘　　要：黔南地区宾夕法尼亚亚纪逍遥阶礁相地层中腕足动物普遍发育,主要产长身贝类和石燕贝类。本文主要研究该区腕足动物与造礁生物叶状藻和Fomitchevella珊瑚之间的生态关系。在叶状藻礁内,小个体腕足动物常附着在藻叶上营假漂浮生活;但藻叶密集处,小个体腕足动物也难见,可能藻丛造成水流循环不畅使腕足动物难以获得充足的食料;藻叶稀疏处,腕足动物个体加大,数量增加。在大型Fomitchevella珊瑚格架礁内,腕足动物与Fomitchevella之间不存在食物上的竞争。腕足动物介壳层为Fomitchevella幼虫定殖提供了生物成因的硬质基底,在此基础之上发育了大型珊瑚礁。腕足动物在Fomitchevella进入统殖阶段由于生态空间受到局限而退居次要地位。Abundant brachiopod fauna distributed widely in Pennsylvanian reefs of Xiaoyao Formation in southern Guizhou,China,in which were rich Choristites and Martinia fossils.The main attention in this paper is to the ecological relationship among brachiopod fauna and reef-building organisms： phylloid algae and Fomitchevella coral.In phylloid algae reef,small brachiopod was sometimes discovered floatting on the algae leaf.But it was difficult to find brachiopod in closely spaced phylloid algae,which was due to that perhaps brachiopod couldn＇t find adequate food when water flow became weak correlated with the prevention of phylloid algae,instead,the brachiopod increased in shape and quantity in sparse phylloid algae.In large-sized coral reef,there was almost no competition for food between brachiopod and Fomitchevella.The brachiopod shells provided biogenic hard substrate for attaching of Fomitchevella larvae and developed large reefs.Brachiopods were precluded from substrate by Fomitchevella because of the limitation of ecological space.

关 键 词：腕足动物 古生态 宾夕法尼亚亚纪 黔南 

分 类 号：Q915.5[天文地球—古生物学与地层学] Q915.816[生物学—古生物学]