洞庭湖湿地生态系统健康演变的研究  

Study on evolution of ecosystem health of Dongting Lake wetland

作　　者：廖丹霞 谢谦[1] 杨波[1] 

机构地区：[1]湖南师范大学资源与环境科学学院,湖南长沙410081

出　　处：《中南林业科技大学学报》2014年第6期112-116,140,共6页Journal of Central South University of Forestry & Technology

基　　金：湖南省自然科学基金(10JJ3022);杭州师范大学遥感与地球科学研究院开放基金资助项目(PDKF2010YG08)

摘　　要：基于Landsat遥感影像数据,以洞庭湖湿地为研究区,利用决策树分类模型提取洞庭湖湿地的景观类型。以压力-状态-响应模型为基础,结合洞庭湖湿地的特点,综合压力、状态、响应3个方面来选取评价指标,建立洞庭湖湿地生态系统健康评价模型,利用GIS技术评价分析洞庭湖湿地在1987至2013年间6个不同时期的生态系统健康演变情况。结果表明:洞庭湖湿地生态系统健康在2003年以前处于下降趋势,此后湿地健康状况逐步回升;而外界压力对湿地健康状态的影响存在一定的时滞性。By taking Dongting Lake Wetland as the researched region,the model of decision tree classifi cation was set up and was used to extract the distribution regions with different features in Dongting Lake Wetland based on Landsat remotely sensed images. According to the pressure,state and response model,taking into account the features in Dongting Lake Wetland,the evaluation indicators of the system were chosen,thus the Dongting Lake wetland ecosystem health assessment model was established. Further,the evolution situations of ecosystem health of Dongting Lake wetland in six periods from 1987 to 2013 were analyzed by adopting GIS technology. The results show that the ecosystem health of Dongting Lake Wetland was in a downward trend before 2003 and after that the health state rose again gradually,and there was a time lag between outside pressure and wetland health state.

关 键 词：洞庭湖湿地 生态系统健康 压力-状态-响应模型 

分 类 号：S718.557[农业科学—林学] X171.1[环境科学与工程—环境科学]