文献类型：期刊文献

中文题名：三江源地区不同剥蚀退化高寒草甸群落生物量与多样性特征

英文题名：Plant community productivity and diversity on alpine meadow steppe in the Three River Headwater Region,Qinghai Province under different denudation levels

作者：刘艳书[1,2] 樊江文[1] 李愈哲[1] 张良侠[1]

第一作者：刘艳书

机构：[1]中国科学院地理科学与资源研究所;[2]中国林业科学研究院荒漠化研究所

年份：2014

卷号：23

期号：3

起止页码：1-7

中文期刊名：草业学报

外文期刊名：Acta Prataculturae Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金项目(31070427);国家重大基础研究项目(2010CB950902);国家科技支撑项目(2013BAC03B04)资助

语种：中文

中文关键词：高寒草甸;剥蚀退化;生物量;功能群;多样性

外文关键词：alpine meadow sleppe; denudation degradation; biomass; functional group; biodiversity

分类号：S812;Q948.15

摘要：对三江源地区不同剥蚀退化高寒草甸群落生物量、群落组成及多样性分析。结果表明,群落地上、地下与总的生物量随退化加剧而降低,群落总生物量的变化受地下生物量的变化影响较大。群落地上生物量的变化主要由群落功能群组成的变化引起,随着剥蚀退化的加剧,群落中各功能群生物量均降低,莎草科和禾本科植物相对生物量降低最为明显,而杂类草相对生物量随退化的加剧而增加。不同剥蚀退化程度下,群落多样性指数和均匀度指数的变化趋势与物种丰富度变化趋势基本一致,均呈先降低后增加的趋势,在群落中度退化时各指数最低。物种多样性与功能群多样性指数表现为相同的变化趋势。
The changes in plant productivity, composition and biodiversity were studied on the plateau meadow steppe denuded to different levels by erosion in the Three River Headwater region. Aboveground, belowground and total biomasses decreased with an increase in denudation, with the reduction of belowground biomass being the most important change. Changes of aboveground biomass related to changes of functional groups. Biomass of all functional groups decreased with increased denudation. Relative biomass of sedges, grasses and legumes decreased whereas the relative biomass of forbs increased with increased denudation. Changes of richness, diversity and evenness indices showed similar trends in relation to denudation, initially decreasing but then increasing, with the lowest values at moderate levels of denudation. Species and functional diversity indices showed similar response trends in relation to the level of denudation.