盐城保护区生境变化与丹顶鹤数量的耦合关系分析

Analysis of the coupling between the change of habitat and the number of the red crowned crane in Yancheng Reserve

以江苏盐城国家级珍禽自然保护区的核心区为研究区,采用灰色关联度模型,分析了不同生境敏感因子与丹顶鹤数量的耦合关系,再根据斜率关联度对生态敏感因子进行了综合排序。结果表明:丹顶鹤数量与研究区的生境敏感因子密切相关,各因子之间相互作用,相互影响,形成了复杂条件下的耦合关系。关联程度的排序为:碱蓬破碎度指数>芦苇破碎度指数>净初级生产力年总量>景观破碎度指数>芦苇面积>香农生物多样性指数>碱蓬面积。其中碱蓬破碎度指数、芦苇破碎度指数、景观破碎度指数与丹顶鹤数量呈负相关关系。碱蓬破碎度指数与丹顶鹤的数量关联度最强,对该地区的生境状况具有良好的指示作用。

Based on the grey correlation degree model, this paper analyzed the coupling relationship between susceptive factors in different habitats and the number of red-crowned crane in the core of Yancheng National Nature Reserve in Jiangsu, and the comprehensive order of the above ecological factors was performed according to the slope correlation degree. The results showed that the number of red crowned crane was closely related to these susceptive factors. These factors interacted and affected each other and formed a complex coupling relationship. The order of correlation was as follows： Suaeda fragmentation 〉 Reed fragmentation 〉 total annual net primary productivity 〉 landscape fragmentation 〉 the area of reed 〉 Shannon＇s diversity index （SHDI） 〉 the area of Suaeda. Among them, the first three factors had negative correlation with the number of red crowned crane. Compared with other factors, the correlation between Suaeda fragmentation and the number of the red crowned crane was most significant, so it was considered as a good indicator to reflect habitat situation.