广西贵州二叠纪生物礁古生态学

本文从类群古生态学、群团古生态学和群落古生态学的角度对我国广西隆林、祥播和贵州紫云的二叠纪生物礁的古生态特征进行了初步总结.广西、贵州的二叠纪礁中可识别出7种结构相.这些礁的造礁生物主要为:硬海绵、纤维海绵、串管海绵、水螅、四射珊瑚、苔藓虫、钙藻、疑源小生物等.这些礁中可划分出6种群团.它们都分布在特定的结构相中.这些礁中可划分出7种群落型14种群落.这些群落的演替以旋回性为特征.

PALEOECOLOGY OF PERMIAN REEF IN GUANGXI AND GUIZHOU

Permian reefs in Guangxi and Guizhou Provinces are mainly constructed by scleresponges,inozoans, shpinctozoans,hydrozoans,rugosa,bryozoans and calcareous algae.The reefs Can be divided into 7 types of fabric-factes:frame factes,baffle factes,prebaffle facies,floated facies,briccia factes,packwacked factes and grained factes.Six guilds have been recognized in the reefs.They are:(1) framing guild,(2) baffling guild,(3) prebaffling guild,(4) binding guild,(5) epibiont guild,(6) dwelling guild.Guilds(1),(4),(5) and (6) are distributed in the framed factes; guilds(2),(5),(6) and (4) are distributed in the baffled facies; guilds(3),(6) and(5) are distributed in the prebaffled factes.Community-types and communities in the reefs are as follows:(1) binder-Framer-community.It includes(a) Archaeolithoporella-sponge community,(b)Archaeolithoporella-thin sponge community,(c) Archaeolithoporella-Monostysisyrinx community,(d)Archaeolithoporella-bryozoan community.(2) epibiont-binder-Framer-community .It includes Tubiphytes-Archaeolithoporella-sponge community.(3) dweller-Framer-community.It includes (a) Tubiphytes-sponge community,(b) foraminiferarugosa community.(4) dweller-Baffler-community.It includes(a) Tubiphytes-less sponge community,(b)foraminifera-less rugosa community.(5) dweller-Prehaffler community. It includes Tubiphytes-few sponge community.The community types(1 ),(2) and (3) are distributed in framed factes; the community-type(4) is distributed in baffle factes; the community-type(5) is distributed in prebaffle facies.The community replacement in the reefs is characterized by the cyclic development of the community-types.This might reflect the fluctuation of the paleoclimate.