唐古拉山南麓多年冻土退化与嵩草草甸变化的关系  

The Relation Between Permafrost Degradation and Kobresia Meadow Change on the Southern Piedmont of the Tangula Range

作　　者：袁九毅[1,2] 闫水玉[1,2] 赵秀锋[1,2] 王绍令[1,2] 

机构地区：[1]兰州大学环境质量评价研究中心 [2]中国科学院兰州冰川冻土研究所青藏高原综合观测研究站

出　　处：《冰川冻土》1997年第1期47-51,共5页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金

摘　　要：测定了分布于唐古拉山南麓两道河－聂荣高地多年冻土岛和冻土退化后，季节冻土区的两种嵩草草甸群落中各物种的重要值以及群落生态优势度、物种多样性，结合冻土环境对比分析得出，诸多物种重要值发生了明显变化，物种多样性、生态优势度都有所增高，这是该区独特的生境特征所导致。另外，草场的特性也发生了改变。The species importances ( IV ), ecological dominances s and species diversities D of two kinds of Kobresia meadow located on a permafrost island and a seasonally frozen ground area degraded from permafrost in the Liangdaohe-Nierong highland on the southern piedmont of the Tangula Range are presented in this paper. By comparing them with the permafrost enviroment, we conclude that many species importances are changing greatly, ecological dominances and species diversities are increasing in a certain degree. This is caused by the special organism habits in this region. Also the characteristics of grassland are changing, so livestock workers shoud pay attentioon to that.

关 键 词：冻土退化 植物群落 蒿草 草甸变化 多年冻土 

分 类 号：Q949.714.3[生物学—植物学] S157.1[农业科学—土壤学]