青藏铁路沿线高寒草原生态质量评价指标体系初探
Preliminary Study on the Index System of Evaluation of the Ecological Quality over the Alpine Steppes along the Qinghai-Tibet Railway

马世震陈桂琛彭敏周国英

文摘	为了全面和客观评价青藏铁路沿线高寒草原生态环境质量以及生态恢复工程的质量,在实地测定大量样方和统计分析的基础上,选取了盖度、物种多样性指数、丰富度指数、物种数、优势物种分盖度、土壤有机质含量、土壤深度等指标作为评价指标,制定了青藏铁路沿线高寒草原生态环境质量与生态恢复质量的评价指标值.该方法既反映了植被生态环境的量化指标,也考虑了与环境密切相关的植物生长立地表征指标,各项指标相互联系和相关,具有易获得性和实用性,符合当地生态环境质量现状,可以科学、客观地评价区域生态环境质量,对于指导青藏铁路建设中的生态建设与生态建设工程的质量具有实际的指导意义.
其他语种文摘	The alpine steppes are mainly distributed in the vast valleys, lake basins, lakeshores, gentle slopes and alluvial-diluvial fans with elevation of 4 100~5 100 m a. s. 1. along the Qinghai-Tibet Railway, and the vegetation is dominated by Stipa purpurea. Based on the investigated results from the plots and the statistical and analyzed results, some indices, such as the vegetation coverage, species diversity, richness, number of species, coverage of the dominant species, organic matter content in soil and soil thickness over the alpine steppes, are selected as the evaluation indices to comprehensively and objectively appraise the quality of alpine the ecological environment over the alpine steppes and the quality of ecological regeneration projects along the Qinghai-Tibet Railway. In this method, the quantificational indices reflecting the ecological environment of vegetation are not only considered, but also the local characteristic indices of vegetation growth closely related to the ecological environment. These indices are closely related each other and are correlative, they are easy to be derived and applied, accord with the local conditions of the ecological environment quality, can be used to scientifically and objectively appraise the regional ecological environment quality, guide the ecological environmental regeneration, and guarantee the quality of the ecological regeneration projects along in the Qinghai-Tibet Railway construction.
来源	干旱区研究 ,2005,22(2):231-235 【核心库】
关键词	生态环境质量 ; 评价指标体系 ; 青藏铁路
地址	中国科学院,西北高原生物研究所, 青海, 西宁, 810001
语种	中文
文献类型	研究性论文
ISSN	1001-4675
学科	环境质量评价与环境监测
基金	中国科学院西北高原生物研究所知识创新工程重点领域项目 ; 国家中西部专项基金 ; 国家科技部基础研究快速反应支持项目
文献收藏号	CSCD:1965322