摘要
一般地说,生物区系(或生物地理)的研究,包括生物分区和生物相分异两个相互联系的方面。生物区是指各种阻绝因素形成的生物分类和演化体系的差异;生物相分异则是因生物的生活环境条件不同而形成的生态组合分异。生活条件的改变往往与地质构造演变所导致的各种阻绝因素相关联。泥盆纪是晚古生代的第一个时代,是继加里东构造阶段之后,在全球范围内海陆分布发生巨大变化的背景下进入新的地质演化历史阶段的一个重要时代,这正是泥盆纪生物区系发生显著变化的重要原因。
The Early Devonian time is another flourishing period,when there were altogether 47 families and 216 genera of the Early Devonian rugose corals scattering in all parts of the world,as documented in the literatures.In the light of the distribution of the rugose corals,and the variations in the proportions of biological associations and ecological types in the rugose coral faunas in different parts of the world,the present paper deals with the relations,differences and criteria for identification of various coral faunas,resulting in the presentation of the classification schemes for biogeographic provinces.4 megarealms including Boreal,Tethyan,Austral and Appalachian,10 realms and 15 subrealms can be recognized within the context of the world in Early Devonian time.The characteristics of the rugose coral associations in abovementioned realms are also described in detail.The ecological types of the Devonian rugose corals comprise solitary corals without dissepiments,solitary corals with dissepiments,massive compound corals and fasciculate compound corals,each of which are different in content and ecological associations.These differences mirror environmental and palaeogeographic divergences.Their conclusions represent a refinement of the interpretation of the ecological associations,and provide an important theorectical basis and practical data for the study of biogeography of the rugose corals.
作者
何原相
He Yuanxiang(Chengdu Institute of Geology and Mineral Resources,CAGS)
出处
《岩相古地理》
CSCD
1996年第S1期129-149,共21页
