摘要
确定优先保护的地区和群落类型对生物多样性保护尤为重要。为评价滇西北地区优先保护的植物群落类型,针对植物群落在维持栖息地稳定及生物多样性保护方面的功能,依据科学性、层次性及可操作性等原则,构建了由3个层次6个指标构成的评价指标体系。6个与群落相关的指标分别是:物种多样性、珍稀濒危植物物种种数、保护植物级别、群落稀有性、特有植物物种种数和群落特有性。通过对滇西北地区现有资料的收集整理,共选出有样地数据的群落61个,归入13个植被亚型。根据数据的分布特征,利用等级赋值的方法制定了各个指标的评分标准。运用层次分析法与专家咨询法相结合确定权重,采用综合指数法对各群落及植被亚型进行评价,再进行重分类,划分出一级、二级、三级和一般保护类型。利用ArcGIS9.3软件制作不同保护级别的植被亚型的分布图,划分出优先保护的区域。综合评价划分出一级保护群落4类,二级31类,三级23类,一般3类;一级保护植被亚型1类,二级6类,三级6类。这些优先保护类型中,一级保护类型少量,分布在贡山县西南部和泸水县西南部的高黎贡山;二级保护类型较为集中地分布在研究区西北部高海拔地区各大山系及东南部高山地区;三级保护类型主要分布在研究区东南部海拔较低的区域以及独龙江、怒江、澜沧江和金沙江流域的河谷地段。
Because of limited resources, it is very important for biodiversity conservation to make accurate assessments of biodiversity prior to setting out measures for protecting regions and communities. To more effectively manage and protect forest resources in Northwest Yunnan, we evaluated the priority plant community types for conservation by mainly considering the function of plant communities in maintaining habi-tat and biodiversity. Recognizing the principles of good science, hierarchy and practicability, we established an evaluation indicator system consisting of six indicators： species diversity, number of rare and endangered plant species, protection level of plant species, number of endemic plant species, and rarity and endemism of community type. We selected 61 formations belonging to 13 vegetation subtypes in Northwest Yunnan for analysis. Assessment criteria followed a general ranking assignment methodology, and weights assigned to individual indicators were determined using an Analytic Hierarchy Process （AHP） and expert consultation. GIS technology was used as an aid to integrate evaluation. The results yielded conservation values of communities as follows： （1） at the association level： 4 associations were at first category, 31 second category, 23 third category, and three general category; （2） at the vegetation subtype level： one was at first category, six second category, six third category. The distribution of priority vegetation subtypes for conservation were： （1） first category： a small area distributed in Gaoligong Mountains; （2） second category： mainly distributed in high altitude mountains in the northwest, and also in some alpine areas in the southeast of the study area; （3） third category： distributed at low altitude in the southeast of the study area and in valleys of the Dulong River, Nu River, Lancang River and Jinsha River.
出处
《生物多样性》
CAS
CSCD
北大核心
2013年第3期296-305,共10页
Biodiversity Science
基金
国家自然科学基金项目(31160101)
国家"十二五"科技支撑计划重大项目(2011BAC09B07)
关键词
生物多样性保护
优先保护群落
评价指标体系
评价标准
滇西北
priority plant community for conservation
biodiversity conservation
evaluation indicator sys-tem
assessment criteria
Northwest Yunnan
