辽河三角洲湿地生态系统健康评价

以生态系统健康及压力 -状态 -响应 (PSR)模型作为研究方法 ,根据湿地生态系统的特点 ,建立一套湿地生态系统健康评价指标体系。以遥感数据及统计监测数据为基础 ,以小流域为评价单元 ,采用 RS和 GIS技术 ,对每个小流域湿地进行单因子和综合评价 ,揭示盘锦市湿地生态系统健康状况的空间分布规律。研究结果表明 :(1)辽河三角洲盘锦市湿地生态系统健康相对较好的区域面积占 2 2 % ,相对一般的占 5 2 % ,相对较差的占 2 6 %。 (2 )双台河口国家级自然保护区湿地生态系统健康相对较好 ,但其中局部地区湿地生态系统健康已经受到威胁 ,健康状况转为一般。 (3)辽河三角洲湿地资源破坏的主要原因是水稻田开发与油田开发

Assessment of wetland ecosystem health in the Liaohe River Delta

The study builds the diagnostic indicators of wetland ecosystem health, based on the characters of wetland ecosystem, according to the theories and approaches of the ecosystem health and the press-state-response model. The data used for the study include remote sensor data and statistic data. Many advanced technologies were adopted in this study, such as Remote Sensor (RS) and Geography Information System (GIS). Meanwhile, according to the assessment cell of small watershed, the study evaluates individual index and comprehensive index. By exploring the spatial distributing rules of wetland ecosystem health, following results were obtained: (1) In the structure of wetland ecosystem health of the Liaohe River Delta, better area accounts for 22%, generic area 52%, worse area 26%; (2) The health of Shuangtai National Nature Reserve is better, among this area in part of regions the situation of health is under threatening; (3) The main reasons, cause the damage to wetland ecosystem, are attributed to the reclamation of paddy field and the exploitation of oil.