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›› 2017, Vol. 34 ›› Issue (3): 329-341.DOI: 10.7523/j.issn.2095-6134.2017.03.007

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Multi-scale spatial distributions of Oedaleus decorus asiaticus

LI Yao1, ZHANG Na1,2   

  1. 1. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China;
    2. Huairou Eco-Environmental Observatory, Chinese Academy of Sciences, Beijing 101408, China
  • Received:2016-05-03 Revised:2016-05-19 Online:2017-05-15

Abstract: This study discusses the spatial distributions of Oedaleus decorus asiaticus (O.d. asiaticus) and the habitat factors which are responsible for the spatial distributions of O. d. asiaticus at different scales. Using the field survey data of O. d. asiaticus density and habitat conditions in Aobaoyingaole village, Xianghuangqi County of Xilingol League, Inner Mongolia, China, we obtained the spatial distribution of grasshopper habitat suitability value (S) within the study area. Then we carried out the spatial autocorrelation analysis of Moran's I, scale variance analysis coupled with Moran's I scalogram, wavelet analysis, or lacunarity analysis to detect the spatial patterns of S value and other related habitat variables. The results showed that O. d. asiaticus exhibited patchy distributions within the three scale domains: <0.3 km, <0.7~1.0 km, and <1.9 km, which might result from the combined effects of many habitat factors at different scales. Vegetation type and vegetation coverage were responsible for the distributions of grasshopper individuals within all the three scale domains; slope, aspect, and topographic wetness index were responsible for the distributions within the moderate and small scale domains; elevation was responsible for the distributions within the large and moderate scale domains; and soil sand content, soil pH value, soil organic matter content, and leaf nitrogen content were responsible for the distribution within the moderate scale domain.

Key words: grasshopper density, habitat suitability, characteristic scale, scale domain, spatial pattern analysis

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