摘要
根据四川东部华蓥山地区茅口期两条实测地层剖面中的腕足动物化石的分布规律,文章分析了该区茅口期腕足动物群落的演替和取代。在分析化石群落的演替中,作者首次应用了顶极和衰退群落的理论,并指出了腕足动物群落在演替过程中达到顶极阶段和衰退阶段的识别标志。作者提出了在同一个生态系中顶极阶段、衰退阶段和取代阶段都是良好的时间标志的新观点。它们都是群落演替和取代的特殊阶段,所以,根据群落演替的各个阶段能比较精确地划分和对比地层。
On the basis of distributional regularity of brachiopod fossils in the two stratigraphic sections of the Maokou stage measured in Huayinshan area, East Sichuan, this paper analyzes the succession and replacement of brachiopod communities. The author first applies the theory of climax and decline communities to analyzing the process of the succession of fossil communities and comes up with the distinguishable criterion about whether the process of brachiopod community succession reaches climax stage or decline stage. Consequently, the author puts forward a new point of view that climax, decline and replacement stages are all better time marks in the same ecosystem, and belong to the special ones of community succession and replacement. It is shown that the stratigraphic division and correlation are effective and have high precision according to the characteristics of each stage of the community succession.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
1992年第4期54-64,共11页
Journal of China University of Mining & Technology
关键词
腕足运动
茅口期
群落
古生代
地层
brachiopod, Maokou stage, climax community, decline community
