摘要
本文主要论述了以下几点:(1)自全新世中期以业的气候变化:暖湿气候时期——干凉气候时期;(2)自全新世中期以来的植被变化,具亚热带成分的阔叶林——落叶阔叶林——森林草原(北部)和落叶阔叶林(南部);(3)考虑陕北黄土高原的建设方针时,不但要注意人类活动所引起生态环境的变化,也要考虑自全新世中期以来气候变化的影响。
The present paper had deal with as follow problems:Ⅰ Ever since mid-peroid of holocene,The climatic changes are as the following: Moist-hot climatic——Temperate climatie——Dry-cool climatie;Ⅱ Ever since mid-peroid of holocene,the changes of vegetation are as following: Forest with subtropical floral element——Temperate deciduous broadleaf forest——Forest steppe(northern part)and temperate deciduous broadleaf ferost(southern part);Ⅲ When we think about the building program on the loess plateau of northern part in shaanxi province,not only attend to that the change of ecotope are coused by mankind activities but also thank about influence of climatic change ever since mid-peroid of holocene.
出处
《陕西林业科技》
北大核心
1990年第4期21-28,共8页
Shaanxi Forest Science and Technology
