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Scientia Silvae Sinicae ›› 2010, Vol. 46 ›› Issue (6): 102-106.doi: 10.11707/j.1001-7488.20100616

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Wintering Habitat Selection by Brown-Eared Pheasant (Crossoptilon mantchuricum) in Huanglong Mountains Nature Reserve,Shaanxi Province,China

Li Hongqun1,2;Lian Zhenmin1;Chen Cungen3   

  1. 1.College of Life Science,Yanan UniversityYan'an 716000;2.Department of Life Science,Yangtze Normal UniversityChongqing;3.College of Resource and Environmental Science,Northwest A & F UniversityYangling 712100
  • Received:2009-03-28 Revised:2009-08-04 Online:2010-06-25 Published:2010-06-25

Abstract:

The wintering habitat selection of brown-eared pheasant(Crossoptilon mantchuricum ) was investigated from November,2006 to January 2007.Line transects of systematic sampling was used to characterize several environmental variables of the whole study area in Huanglong Mountains(109°38′—110°12′E,35°28′—36°02′N)of Shaanxi Province.The distance between any two nearest transects was 200m and grids (200 m×200 m) were obtained every 200m along transects.The grids with presence of the brown eared-pheasant were defined as detected grids (n=53),the grids with absence of the brown-eared pbeasant as undetected ones (n=46).Distance to nearest water,nearest unpaved road,nearest village and nearest edge of woods,altitude,slope degree,cosine of slope aspect,cover of trees,cover and average height of shrub all showed significant differences between detected and undetected grids.Univariate analysis of logistic regression was derived from the above variable and the variables with probability less than 0.30 were retained,then by spearman correlation we excluded the variables of distance to nearest water,nearest unpaved road and nearest village.Forward elimination stepwise logistic regression was conducted with the remained variables as independent variables.Finally,regression equation with the lowest AICC value was regarded as the optimal model.The model could be formally expressed as: π(x)=eg(x) /(1+eg(x) ),g(x)=22.107-0.004×distance to nearest edge of woods+13.623×cover of trees-0.021×altitude.The model suggested that wintering habitat selection of brown eared-pheasant was negatively related to distance to nearest edge of woods and altitude,positively related to cover of trees.The model could acurately predict the occurrence of wintering habitat of brown-eared pheasant.

Key words: Crossoptilon mantchuricum, Logistic regression, Huanglong Mountains