摘要
以锡林浩特北的典型草原群落为研究对象,通过对1997、2001和2004年3个时间段的样方资料来揭示植物群落特征和2种针茅多样性的变迁.结果表明:1)调查的植物群落样方中,建群种组成都发生了显著变化;2)豆科植物数量和菊科植物数量都急剧下降;3)群落中多年生草本数量锐减;4)群落中2种针茅的平均高度不断降低;5)2种针茅在群落中的重要值越来越低;6)2种针茅群落7a之内功能完全退化的主要原因是人类的过牧活动,而非气候因素.
Shengliyidui in Xilinhot Municipality, a typical grassland in Inner Mongolia was used to study plant community characteristics and diversity changes of two Stipa plant communities by three time quadrat material （1997, 2001 and 2004）. Data showed that dominant species changed dramatically in the quadrat; Total number of legume plants and total number of compositae decreased gradually to 0. The number of perennial herbs declined seriously. The average height changed in two kinds of Stipa. The importance of two dominate Stipa had become progressively lower. The main reasons of complete function degradation of the two Stipa communities in seven years were over,razing：, rather than climate factors.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第2期199-204,共6页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金重点资助项目(41030535)
“十二五”科技支撑项目资助(2011BAC07B01)
关键词
植物群落特征
针茅
多样性
放牧
plant community characteristics
Stipa capillata
diversity
graze
