摘要
长江上游是我国生物多样性最丰富的地区之一,也是全球生物多样性热点地区之一。准确可靠地掌握生物多样性信息是生物多样性保护科学决策的基础,大尺度的生物多样性保护重要性评估已成为生物多样性研究及其保育管理和决策最紧迫的问题之一。设计了由植被景观多样性指数、自然保护区多样性指数、基于生态系统类型的物种多样性指数、国家保护植物多样性指数和国家保护动物多样性指数5大指标构成的区域生物多样性综合评价指标体系及其计算公式,并以县域为评价单元,开展了长江上游生物多样性综合评价。结果表明,长江上游生物多样性保护重要性评价结果为极重要的县域共18个,占总县数的4.95%;评价结果为重要的县域共41个,占11.26%;评价结果为次重要的县域共76个,占20.88%;评价结果为中等水平的县域共106个,占29.12%;评价结果为中下水平的县域共68个,占18.68%;评价结果为不重要的县域共55个,占15.11%。长江上游生物多样性保护重要性评价结果为极重要、较重要和重要的县域主要分布于横断山区、秦巴山区、华西雨屏区、长江源区和川渝鄂黔交界处山地。
The upper reaches of the global biodiversity hotspots the Yangtze River is one of the most abundant biodiversity areas in China, and also one of To obtain precise biodiversity information is a foundation of scientific decision-making for biodiversity conservation. The broad-scale biodiversity assessment has already become an urgent problem in the study and administration of biodiversity. This paper created a comprehensive index system and calculating expressions for evaluating regional biodiversity that were composed of vegetation landscape diversity index, nature reserve index, species diversity index based on various ecosystem types, and national protected species （flora and fauna） diversity index. We use this method to evaluate the importance of biodiversity conservation in the upper reaches of the Yangtze River by the county area as the basic assessment unit. The results of the assessment show that： （1） there are 18 counties with the richest biodiversity accounting for 4. 95% of total county number; （ 2 ） 41 counties with richer biodiversity accounting for 11.26% ; （3） 76 counties with rich biodiversity accounting for 20.88% ; （4） 106 counties with moderate biodiversity accounting for 29.12% ; （5） 68 counties with below moderate biodiversity accounting for 18.68% ; and （6） 55 counties with poor biodiversity accounting for 15.11%. All counties belonging to above-mentioned rich biodiversity mainly distribute in the Hengduan Mountains, Qinling-Daba Mountains, rainy zone of west China, and boundary mountains across Sichuan province, Chongqing city, Hubei province and Guizhou province.
出处
《生态学报》
CAS
CSCD
北大核心
2009年第5期2603-2611,共9页
Acta Ecologica Sinica
基金
中国科学院知识创新工程资助项目(KSCX2-YW-N-066)
国家自然科学基金资助项目(30872017)
国家“十一五”科技支撑计划资助项目(2006BAC01A15)
关键词
生物多样性评价
指标体系
长江上游
县域
biodiversity assessment
index system
the upper reaches of the Yangtze River
county area
