Species Diversity and Community Structure of Small Mammals in Baishuihe National Nature Reserve, Sichuan Province

In order to investigate the fauna and diversity of small mammals in Baishuihe National Nature Reserve Nature Reserve, a survey of small mammals was conducted by snap traps and pitfall traps from April to September 2020. The survey covered 10 survey quadrats at 8 elevation sections, spanning from 1400 m to 3350 m altitude, and 26 species of small mammals were collected. According to the historical records and published literatures published by the project team, a total of 44 species of small mammals belonging to 4 orders and 13 families were identified in Baishuihe National Nature Reserve. Among them, there were 23 species of Rodentia, 12 species of Insectivora, 5 species of Chiroptera and 5 species of Lagomorpha. According to the calculation of biodiversity index, Margalef index and Shannon-Weiner index showed the lowest species diversity at 1400 m altitude, Simpson index showed the lowest species diversity at 3550 m altitude, species evenness index showed that the relative density of species at 1500 m was the most uneven, and the number of individuals at 1800 m was the most uniform. The conclusion of this study could provide theoretical and data support for species diversity research and biological protection of small mammals in Baishuihe National Nature Reserve.