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为了保护浑善达克沙地榆树(Ulmuspumila)疏林景观,拟建立自然保护区。基于榆树疏林植被图,运用ArcGIS分析榆树疏林斑块数量、面积、破碎化程度,发现该区榆树疏林斑块大小差异较大,小斑块较多,斑块边界割裂严重,破碎化程度高,需要及时加以保护。按照景观生态学原理、生物岛屿地理学设计自然保护区原则,选择疏林斑块集中分布区,作为潜在核心区,运用ArcGIS的缓冲区分析功能,设计不同的宽度,发现斑块边界向外延伸3km能够连接较多的斑块,而占用较少的非疏林斑块土地面积。同时调查斑块外不同距离样方与疏林斑块的群落相似度,发现1km以内能够包含大于10%相似度的群落。由此而初步确定的核心区分布在正蓝旗23个嘎查,面积1531km2,约占全旗总面积的13%。
In order to protect the Ulmus pumila sparse forest landscape in Hunshandake Sands, it is proposed to establish a nature reserve. Based on the Ulmus pumila vegetation map, ArcGIS was used to analyze the number, area and degree of fragmentation of Ulmus pumila tree. The results showed that the sizes of Ulmus pumila tree patches in this area varied greatly, with small patches and severely fragmented borders To a high degree, need to be protected in time. In accordance with the principles of landscape ecology and bio-island geography design of nature reserves, the concentration distribution area of sparse forest patches was selected as a potential core area. Using ArcGIS buffer analysis function, different widths were designed and patch boundaries were found to extend outward 3km can connect more plaques, occupy less land area of non-sparse patches. At the same time, we investigated the community similarities between patches of different distances and patches of sparse wood, and found that within 1km the community with more than 10% similarity could be included. From the initial determination of the core area is located in Zheng Lanqi 23 Gacha, an area of 1531km2, accounting for about 13% of the total area of the entire flag.