以3期盐城海滨湿地景观分布图为基础,在GIS技术支持下,以食物丰富度、水源、隐蔽条件、人类活动、最小斑块面积和日常活动距离为生境适宜性评价因子,采用生境评价模型,分析了丹顶鹤(Grus japonensis)适宜越冬生境的变化.结果表明:1987-2007年,丹顶鹤生境类型发生显著变化,盐城海滨区域自然湿地面积减少27.6%,丹顶鹤条件适宜生境总面积迅速减少;丹顶鹤条件适宜生境面积和比例发生显著变化,面积由2354.36km2减为1100.13 km2,比例由1987年的51.6%减为2007年的24.1%;随着自然湿地景观破碎化和人类干扰逐渐加剧,盐城海滨区域丹顶鹤适宜生境的比例由1987年的28.2%减为2007年的13.5%,面积由1286.05 km2减为614.95 km2.
Temporal changes of Grus japonensis suitable wintering habitat in coastal zone of Yancheng,Jiangsu
Based on the 1987 , 1997 , and 2007 distribution maps of wetland landscape in coastal zone of Yancheng, and with the support of GIS technology, the temporal changes of Grus japonensis suitable wintering habitat in the zone were analyzed, taking the food richness, water resources, shelter condition, human activities, least-patch area, and distance of daily activities as the assessment factors of habitat suitability, and the habitat evaluation model as the assessment procedure. In 1987-2007, due to the great changes of habitat type and the landscape fragmentation, the total area of wetlands in the zone reduced by 27. 6％ , and the habitat quality suitable for G. japonensis declined significantly. The habitat area condition suitable for G. japonensLs reduced from 2354. 36 km2 in 1987 to 1100. 13 km2 in 2007 , accounting for 51. 6％ and 24. 1％ of the total habitat area, respectively. With increasing human disturbance and wetland landscape fragmentation, the proportion of suitable habitat for G. japonensis decreased from 28. 2％ in 1987 to 13. 5％ in 2007, and its area decreased from 1286. 05 km2 to 614. 95 km2.
国家科技期刊平台
NSTL
万方数据
维普
