摘要
基于湿地生态系统健康理论和压力-状态-响应模型,以拉萨河谷高寒湿地-拉鲁湿地生态系统为研究对象,构建了高寒湿地生态系统健康评价指标体系,并确定了具体的评价指标、评价标准、指标权重、评价等级和评价方法,对拉萨河谷高寒湿地生态系统健康状况进行了评价。研究结果表明:1995～2004年间拉鲁湿地生态系统健康程度处于快速下降状态,2005～2010年间拉鲁湿地生态系统健康程度呈波动趋势,生态系统处于临界健康状态,生态系统受到人为影响比较大,结构发生明显变化,系统活力减弱,人为破坏、资源不合理开发等对生态压力较大,生物多样性及生态系统结构处于不稳定状态,生态系统服务功能减弱。
Based on the theories of wetland ecosystem health and by using ＂Pressure - State - Response ＂model, a health assessment indicator system for Alpine valley to Lhasa wetland - Lalu wetland ecosystem was built using assessment indices, assessment criteria, indices weighted values, assessment grades, and assessment methods to assess the health state of this ecosystem. Between 2005 and 2010, Lalu wetland ecOsystem health showed fluctuating trends, eco -system was in critical health condition, ecological systems were influented largely by human impact, the structure changed significantly, the system weakened vitality, human destruction and unreasonable resource development were the ecological pressure, biodiversity and ecosystem structure were in an unstable state, ecosystem services weakened.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2013年第5期95-99,共5页
Journal of Arid Land Resources and Environment
基金
教育部人文社会科学研究西藏项目(12XZJC790001)资助
关键词
拉鲁湿地
高寒湿地
生态系统健康评价
评价指标
拉萨河谷
Lalu wetland
alpine wetland
ecosystem health assessment
assessment indicator system
Lhasa river valley
