凉水自然保护区松鼠和星鸦贮食生境选择差异

2003年9月30日-2005年10月8日,在黑龙江凉水国家级自然保护区,应用样方调查法,采用Vander-ploeg和Scavia选择系数Wi和选择指数Ei作为衡量指标,对松鼠和星鸦贮食生境选择进行了研究。结果表明,二者贮食生境选择优先顺序略有不同,松鼠偏爱的贮食生境依次是：云杉林、原始红松林、人工红松林、针阔混交林、人工云杉林、白桦林、针叶混交林、人工落叶松林、阔叶混交林、冷杉林和其它。星鸦对贮食生境的偏爱程度依次为：人工红松林、原始红松林、云杉林、人工云杉林、针阔混交林、阔叶混交林、白桦林、针叶混交林、人工落叶松林、冷杉林和其它。在对贮食微生境因子的选择利用上,二者大致相同,只是在对优势灌丛的选择上略有差异,松鼠优先选择在狗枣猕猴桃优势灌丛内贮藏红松种子,而星鸦优先选择在刺五加优势灌丛内贮食。松鼠和星鸦贮食生境选择的差异将对随后的红松天然更新过程产生不同的影响。

Differences on hoarding habitat selection of squirrels (Sciurus vulgaris)and Eurasian nutcrackers (Nucifraga caryocatactes) in Liangshui Nature Reserve

We investigated habitat selection and hoarding microhabitat use of squirrels(Sciurus vulgaris)and Eurasian nutcrackers(Nucifraga caryocatactes)in Liangshui National Nature Reserve during September 2003-October 2005.We sampled 365 400 m2 quadrats and 1463 4m2 quadrats in 11 forest types.Squirrels and nutcrackers differed in their hoarding behavior and habitat selection.Squirrels selected major forest types(from most to least preferred):natural spruce,primary Korean pine,planted Korean pine,mixed conifer-broadleaf,planted spruce,secondary birch,mixed-conifer,planted larch;ninth mix-broadleaf,natural fir,other forest.Eurasian nutcrackers selected major forest types(from most to least preferred):planted Korean pine,primary Korean pine,natural spruce,planted spruce,mixed conifer-broadleaf,mixed broadleaf,secondary birch,mixed conifer,planted larch,natural fir,other forest.We used Vanderploeg and Scavia selectivity index,Wi and Ei,to evaluate microhabitat utilization selection of squirrels and Eurasian nutcrackers.Order of selection was as above except shrub type.