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青海海北不同退化程度矮嵩草植物群落特征研究
引用本文:史惠兰. 青海海北不同退化程度矮嵩草植物群落特征研究[J]. 安徽农业科学, 2011, 39(20): 12250-12252
作者姓名:史惠兰
作者单位:青海大学生物科学系/高原资源植物与细胞工程实验室,青海,西宁,810016
基金项目:青海大学"中青年科研基金"项目,国家十一五科技支撑项目
摘    要:[目的]揭示高山草甸生态系统结构、功能,为高山草甸草场的开发利用、科学管理和草地畜牧业可持续发展提供科学依据。[方法]以青海海北原生矮嵩草(Kobresia hum ilis)植物群落(Ⅰ)、退化矮嵩草植物群落(Ⅱ)为研究对象,分析植物群落结构特征;同时,对矮嵩草群落生物量及多样性指数,丰富度指数进行相关性分析。[结果]群落(Ⅰ)的物种丰富度、生物多样性指数、生物量(分别为42、3.531、3 553.1 g/m2),均高于群落(Ⅱ)(分别为37、2.270、3 391.1 g/m2);群落总生物量与物种丰富度在0.01水平上呈极显著正相关,多样性指数与地上生物量、物种丰富度在0.01水平上呈极显著正相关。[结论]群落(Ⅰ)结构合理,地表植被覆盖度大,对该地区生物多样性、生态系统功能起重要维护功能。

关 键 词:矮嵩草草甸  群落结构  物种多样性

Characteristics of Kobresia humilis Community Structure at Different Degraded Levels in Northern Qinghai
SHI Hui-lan. Characteristics of Kobresia humilis Community Structure at Different Degraded Levels in Northern Qinghai[J]. Journal of Anhui Agricultural Sciences, 2011, 39(20): 12250-12252
Authors:SHI Hui-lan
Affiliation:SHI Hui-lan(Laboratory of Resource Plant and Cell Engineering in the Qinghai-Tibet Plateau,Department of Biosciences,Qinghai University,Xining,Qinghai 810016)
Abstract:[Objective] To reveal structure and function of alpine meadow ecosystem and thus to provide a scientific basis for development,utilization and scientific management of alpine meadow pasture as well as sustainable development of animal husbandry.[Method] Characteristics of Kobresia humilis communities with primary vegetation(community I) and degraded vegetation(community II) were analyzed.[Result] Species richness,biodiversity indices and biomass of the community I were respectively 42,3.531 and 3 553.1 g/m2,which were respectively higher than those of the community II(37,2.270 and 3 391.1 g/m2).Correlation analysis show that community biomass was correlated positively with the richness index(P<0.01),and biodiversity index was correlated positively with aboveground biomass and the richness index(P<0.01).[Conclusion] The Kobresia humilis community I has reasonable structure and large coverage of ground vegetation,which play an important role in maintenance of biodiversity and ecosystem function.
Keywords:Kobresia humilis meadow  Community structure  Species diversity
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