青海湖北岸植被特征研究

Study on Characterlstics of Vegetation in The North shore of Qinghai Lake

根据青了孔和ＱＨ８５－１４Ｃ孔的孢粉分析资料以及对青海湖北岸植物群落的系统取样调查，对该地区的植被进行了区系、生活型、演变趋势及环境因子等综合研究。结果表明：（１）该地区现有种子植物２６科、７５属、１４２种，其地理成分复杂，分布区交错，起源有老有新，特有种、属少，种类不多；（２）自然植被可分为７个植被型、２４个群落；（３）与本地区高寒的气候特征相适应，植物群落以地上芽植物和隐芽植物为主；（４）全新世以来，随着气候由暖→冷，湿→干、植被演变趋势为森林草原→森林→温性草原；（５）影响植被分异的主要环境因子为海拔（热量）、大气温度和大气湿度。

This paper a nalysed flora,living type,succession of vegetation and environmental factor in the north shore of Qinghai Lake on the basis of the information of pollen analysis in cores of Qinghai-3 and QH85-14C and the systematic sampling made in Aug, 1990. The results show as follows:(1) There are 26 species of 75 genera, 142 family in the region.(2)Natural vegetations are divided into 7 vegetation types,24 communities in the region.(3)Plant communities chiefly include chamaephytes and cryptophytes due to the alpine climate. (4)Since Holocene, with cliamte changes from warm and mosit to cold and dry,succession trends of vegetation:Forest steppe-Forest-Temperature steppe.(5)Main environmental factors to affect variation of vegetation are atmospheric temperature,humidity and altitude(quantity of heat).