张家界市大鲵养殖基地空间分布特征及影响因素

The Spatial Distribution and Elements of Chinese Giant Salamander Base in Zhangjiajie City

张家界是我国第一个大鲵国家级自然保护区所在地,大鲵产业是张家界重要的特色产业。该研究运用ArcGIS分析工具和地理集中指数、不平衡指数等统计分析方法,对张家界市内大鲵养殖基地的空间分布特征及其自然环境、社会环境等影响因素进行了分析。结果表明:(1)张家界市大鲵养殖基地呈聚集分布状态,各地区之间大鲵养殖基地分布差异性明显;(2)自然环境影响因素方面,高程和水系是影响张家界市大鲵养殖基地分布的主要因素,80.8%的大鲵养殖基地分布于低海拔地区,且具有明显的趋河流分布特征,坡度和坡向因素对大鲵养殖基地的分布影响较小;(3)社会环境影响因素方面,一级公路、二级公路、三级公路及市(区、县)政府位置对张家界市大鲵养殖基地分布的影响较大,高速公路和铁路的影响较小。

Zhangjiajie is the first national nature reserve of giant salamander in China,and giant salamander industry is an important characteristic industry in Zhangjiajie.By means of ArcGIS analysis tools,geographical concentration index,imbalance index and other statistical analysis methods,the spatial distribution characteristics,natural environ⁃ment and social environment of the breeding base of giant salamander in Zhangjiajie City are analyzed.The results showed that:(1)the breeding base of giant salamander in Zhangjiajie City was clustered and distributed,and the dis⁃tribution difference of giant salamander breeding base was obvious between different regions;(2)In terms of natural environment factors,elevation and water system are the main factors affecting the distribution of giant salamander breeding base in Zhangjiajie City,80.8%of the breeding base of giant salamander is distributed in low altitude area,and has obvious characteristics of river distribution;(3)In terms of social environment factors,the first class high⁃way,the second class highway,the third class highway and the city(district and county)government position have great influence on the distribution of the breeding base of the giant salamander in Zhangjiajie City,and the influence of the expressway and railway is relatively small.