青海湖湖盆南岸植物群落的生态优势度与海拔梯度  

ECOLOGICAL DOMINANCE OF PLANT COMMUNITY AND ALTITUDINAL GRADIENT ON SOUTHERN OF QINGHAI LAKE BASIN

作　　者：淮虎银[1] 周立华[1] 

机构地区：[1]中国科学院西北高原生物研究所,兰州医学院药学系

出　　处：《西北植物学报》1995年第3期240-243,共4页Acta Botanica Boreali-Occidentalia Sinica

摘　　要：利用Ｓｉｍｐｓｏｎ优势度指标对青海湖湖盆南岸的植物群落优势度进行了测定，并讨论了群落生态优势度与海拔梯度之间的相互关系。结果表明，海拔梯度是通过影响群落内的种群组成影响群落的生态优势度，群落生态优势度与群落内植物种群数呈负相关，群落内种群越丰富，群落生态优势度就越小；反之越大。在整个样带中，海拔３４００－３７００ｍ之间群落生态优势度最小；而在３２００－３４００ｍ之间和３７００ｍ以上，群落生态优势度都比较大。The relationships between the ecological dominances of plant communities and altitudi-nal gradient are studied and the Simpson’s dominance index is used in this paper. The resultsshow that the altitudinal gradient affects the ecological dominances of plant communities byaffecting the numbers of populations in the communities,and the dominances of communities are related negatively to the numbers of populations in the communities,The bigger the number of populations is,the smaller the dominances is. In the whole trasect,the ecological dominances of communities are small between 3400-3700 m above sea level,between 3200-3400 m and above 3700m,the dominances aes are big relatively.

关 键 词：植物群落 青海湖湖盆南华 生态优势度 海拔梯度 

分 类 号：Q948.15[生物学—植物学]