广西隆林科风造礁海绵的古生态研究

PALEOCOLOGY OF REEF-BUILDING SPONGES IN KEFENG REEF,LONGLIN,GUANGXI

张孝林 张维

Zhang Xiaolin Zhang Wei

钙质海绵是我国南方二叠纪生物礁的主要造礁生物之一,由不同类型钙质海绵构成的化石群落记录了礁体形成的完整过程。广西隆林科风的化石群落是我国南方二叠纪生物礁内保存完好的群落之一,本文以此为研究对象,初步确定了科风生物礁的性质及其化石群落的组成;讨论了造礁海绵的古生态,并与毗邻祥播生物礁的造礁生物进行了对比;总结了科风生物礁发生、发展、消亡的基本特征。

Four fossil reef communities can be differentiated from Kefeng reef,Longlin region,Guangxi,in which three communities belong to Middle Permian (from zone to zone),and one belongs to Late Permian ( zone).Many ofthe 25 genera and 38 species found here are restricted to Sphinetozoa,Inozoa and Scle-rospongiae.Baesd on the general characteristics of the communities,the sequence of Ke-feng reef can be divided into four distinct reef-cycles.And these cycles are correspongding to the flourish of the reef-building sponge communities.Some statistical data suggest that the size and form of calcisponges can indicate different environment.In general,those sponges lived in a higher-energy water are always smaller in their form and denser in distribution.The binding organisms play an important role in reef development.They are very abundant in quantity and important to the build-ing up a typical reef.

10.11743/ogg19900409