关键词: 红树植物, 无瓣海桑扩散区, 树种, 生态位宽度, 生态位重叠

Abstract: In this paper, a series of habitat factors (including elevation, slope, aspect, stream density, habitat types, and bamboo species) in the giant pandas’ high-frequency activity areas of Foping and Changqing ature eserves in the Qinling Mountains were investigated, and the relations of these factors with the locations of giant pandas’ activity were analyzed. The research aimed to explore the preferred habitat features for giant pandas and to provide scientific supports for finding their possible potential habitats. The results showed that the habitat features of the two reserves had both similarity and difference. There existed a high-frequency activity area of giant pandas in each of the reserves, which showed macro-habitat characteristics. In the high-frequency activity areas, the habitat selection of giant pandas matched well with the habitat availability. The selected habitats by giant pandas had an elevation of 1200-2600 m, a slope of 20-40 degrees, a stream density of 2-3 per square kilometer, a vegetation of mixed coniferous and broadleaf forests, and a distribution of bamboo species Bashania fargesii and Fargesia qinlingensis.

Key words: Mangrove, Sonneratia apetala extension area, Tree species, Niche breadth, Niche overlap