Spatial heterogeneity and multi-scale effects of species richness of birds and mammals in Xinjiang
GAO Ge1, LI Hai-ping1, WAN Hua-wei2, LI Li-ping3
1. School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China; 2. Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment, Beijing 100093, China; 3. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
Abstract：Spatial distribution of 10km×10km gridded data of birds and mammals species and the 1km×1km land use in Xinjiang were taken as the basic data sources. Using NDVI, altitude, and geographical location of latitude as ancillary data to scale down the 10km×10km grid data and upscale the 1km×1km land use data respectively. Matching the data at 1km intervals from 1~10km resolution and different landscape index were calculated and analyzed under each scale. Scale effects were also studied at ecosystem level in order to find the reasonable and suitable scale that fit for characterizing the spatial heterogeneity of birds and mammal species diversity. The results show that:overall landscape types were rich in Xinjiang. Landscape richness and fragmentation in northern Xinjiang were higher than those in southern Xinjiang relatively; different types of patches distributed unevenly and there were dominate patches existed. Scale effects were more obvious for birds in ecosystems of settlement, water and wetland, but more significant for mammals in farmland and forest ecosystems. Under 7~10km scale, the smaller the settlement area was, the higher the degree of its landscape division, while the more discrete and fragmentation of landscape of water, the more complex of its shape and abundant of birds species. Characteristics of farmland and forest ecosystems have more significant meanings to the richness of mammals. Under the scale of 7~10km, mammal species richness was lower where farmland patches were more discrete and complex in shape. With the scale of 4km, mammal species richness was higher wherever forest patches are well connected and more complex in shape.
高戈, 李海萍, 万华伟, 李利平. 新疆鸟类和哺乳动物物种丰富度空间异质性及其多尺度效应[J]. 中国环境科学, 2021, 41(3): 1436-1446.
GAO Ge, LI Hai-ping, WAN Hua-wei, LI Li-ping. Spatial heterogeneity and multi-scale effects of species richness of birds and mammals in Xinjiang. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(3): 1436-1446.
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