摘要
生物的空间分布主要受纬向热梯度和地理屏障控制。根据此原理,我们可以定量估计地质时期岩石圈板块的数量、空间位置及定向与生物分区之间的关系。本文在强调纬向温差对生物分布有重要影响的基础上,评述并修改了Sohopf 1976年提出的一般性海洋生物地理分区性模式。经过修改后的新模式比较准确地估计了现代浅海生物地理的分区形式。将该新模式应用到二叠纪,所估计的海洋生物分区性与对实际化石材料分布研究所得出的生物分区形式很吻合,从而表明在二叠纪可能存在与目前地球相似或更强的纬向气候分带性。
The relationship between the number, position and orientation of lithospheric plates and marine biogeographic provinciality may be estimated quantitatively since the spatial distribution of organisms is primarily controlled by latitude-related temperature gradients and geographical barriers. This paper modifies Schopfs (1976) model for quantitatively estimating shallow marine provinciality in recognition of latitude-related temperature gradients as the primary biogeographi-cal factor. A test of the modified model against modern marine zoogeography reveals high consistency between them. Using this modified model and the Permian palaeogeographical reconstruction maps of Scotese and McKerrow (1990), fifteen shallow benthic marine provinces were estimated to be Early and Late Permian in age respectively. A comparison of the estimated Permian marine provinciality with previously recognised empirical provincial patterns reveals a high degree of congruity, which may imply that there existed moderate to high latitudinal thermal gradients during the Permian, a level probably similar to that of the present world.
出处
《地质学报》
EI
CAS
CSCD
北大核心
1996年第4期351-360,共10页
Acta Geologica Sinica
关键词
生物地理
分区性
二叠纪
定量估计
地质时代
plate structure, biogeographic provinciality, model of biogeographic provin- cialism , Permian
