赤腹松鼠采食选择的季节性变化

Feeding Selection of Callosciurus erythraeus in Different Seasons

2008年9月至2010年8月,对广西宜州龙江河畔赤腹松鼠采食选择的季节性变化进行分析。赤腹松鼠对榕树的采食量最大,约占总采食量的36.53%,食物采食选择的种类存在显著差异(P<0.05),各季节采食的种类无显著变化(P>0.05);取食偏好分析、食物生态位宽度和重叠度结果表明,夏季的生态位宽度最大,为4.1545,秋季的生态位宽度最小,为3.5001,夏季和秋季的生态位重叠度最大,为0.9882,夏季和冬季的生态位重叠度最小,为0.9343。

Feeding selection of the red bellied tree squirrel（Callosciurus erythraeus） in different seasons was investigated in Longjiang riverside,Guangxi from September 2008 to August 2010.The result showed that： Ficus microcarpa accounted for about 36.8% of total feeding,there were significant differences between picking species（P0.05） and no significant differences among feeding type in season（P0.05）.Feeding preferences,food niche breadth and overlap results indicated that： the wide niche breadth was 4.1545 in summer,the narrow niche breadth was 3.5001 in autumn;the maximum niche overlap was 0.9882 in summer and autumn,the minimum niche overlap was 0.9343 in summer and winter.