青海湖地区环境变化对动物区系 演变影响的探讨, The effect of the environmental change of the fauna on the evolution in Qinghai lake region [Effet du changement de l'environnement de la faune sur l'évolution de la région du lac Qinghai].

Résumé

青海嘲地区近百年来由于气候干暖化趋势增强，胡同植被、土地退化，人类经挤活 动加剧．胡区青藏高原动物成分的种类和数量减少，但蒙新及华北动物区系成分则有增加趋势．象使谈区动物区系成分发生显著变化．从青海湖地区动物医系形成来看．决定动物区系演变的 原因主要是气候 生物等生态因子的综台作用．人为因子髟响仅在近3O年来才日益麦出． The species and quantity of the fauna in Qinghai-Xizang Plateau decreased in the past century because of the drying and warming dendency of climate and hence the dégradation of végétation and soils around the lake as well as the intensification of culitvation. However, the fauna belonging to Inner Mongolia. Xin-jian and North China tend to be increased, resulting to a considérable change of the fauna in the arae. In the view of the formation the fauna in Qinghai Lake région what controlling the fauna evolution are no other than the comprehensive ecofactors such as climate and biology, but it is about thirty years ago that human activities began to have impact on the lake environment.