摘要
以南四湖为研究对象,基于遥感和地理信息系统技术选择干旱、洪涝和水体污染为生态风险源,用景观格局指数评价生态系统的地位和受体的易损性,并依据生态风险值的度量的原理,通过计算综合风险概率及生态综合损失度得到南四湖的生态风险值。研究结果显示南四湖区域生态风险存在上下级湖分异与湖滨带状分异两大空间规律,体现了南四湖区域生态风险的空间异质性。
Nansi Lake was selected as our study site for this study. Droughts,floods and water pollution for this site were used as a source of the ecological risk( ER) with information by the technologies of remote sensing images and geographic information system. Landscape indices were developed to evaluate ecosystem status and fragile ER receptors. Based on the principles of the measurement of ER,the ER values for Nansi Lake were obtained by integrated comprehensive loss probability and the ER degree. The results showed that the ER for Nansi Lake area had significant differences between upper and lower lakes with spatial distributions. It also showed that ER for Nansi Lake had a spatial and regional heterogeneity.
出处
《生态学报》
CAS
CSCD
北大核心
2015年第5期1371-1377,共7页
Acta Ecologica Sinica
基金
国家自然科学基金(41072164)
曲阜师范大学南四湖湿地生态与环境保护省高校重点实验室资助