崇明东滩鸟类生境适宜性空间模糊评价

SPATIAL FUZZY COMPREHENSIVE ASSESSMENT OF BIRD HABITAT SUITABILITY IN CHONGMING DONGTAN

利用模糊数学方法、地理信息系统(GIS)和遥感(RS)技术,采用定性和定量相结合的方法构建了鸟类生境适宜性空间模糊评价模型,解决了隶属函数的空间化问题,扩展了模糊数学方法在自然保护区空间地理事物评价中的应用。通过评价几种鸟类的生境适宜性,结果表明:大多数鸟类在海三棱藨草外带和光滩适宜性最好,由此向内陆或水域方向适宜性降低,这一显著变化与崇明东滩环境演化趋势有着密切的关系;由于鸟类生活习性的差异,不同鸟类的空间适宜性范围存在一定的差异性;已有的保护区功能区划未能充分考虑当前鸟类生境适宜性情况,生境适宜性的评价结果可以为崇明东滩保护区的功能区划提供技术性指导。

Based on the GIS and RS technologies, the paper developed a method of spatial fuzzy comprehensive assessment about bird habitat suitability in the nature reserve,and researched the spatial expression of the subordinative degree and the confirmation of weight vectors ,and extended the field of fuzzy mathematics at assessment of environment. By assessing habitat suitability of several birds in Dongtan, the results show that the bird habitat suitability is good at outer of Scirpus mariqueter zone and bare tidal flat,and the spatial distribution displays that the bird habitat suitability reduces from them to the land or water in the study area,which is consistent with the characteristic of Chongming Dongtan environment change;and the range of the different bird habitat suitability is different because of different of bird habitat; the former function zoning of Dongtan nature reserve didn＇t consider the status of the bird habitat suitability,and so,it is important that the assessing results of bird habitat suitability provide a direction for the function zoning of Dongtan nature reserve.