甘肃马鬃山盘羊春季卧息地的利用

Bed-site Utilization of Ovis ammon darwini during Spring in Mazong Mountain

2010年4～5月,在甘肃省马鬃山地区调查研究了盘羊的卧息地生境选择,共测得盘羊利用样方81个,对照样方81个。通过比较表明,马鬃山地区的盘羊夏季卧息地主要选择高海拔、阳坡、中坡位、坡度大、红砂植被、碎石地、植被密度低、远离道路和居民点、接近水源和隐蔽物、隐蔽程度好的区域。逻辑斯蒂回归分析表明,海拔(OR值1.614,95%CI1.248～4.419)、坡向(95%CI1.682～3.745)、坡位(95%CI0.839～3.156)、坡度(OR值1.705,95%CI1.227～2.369)、植被类型(95%CI0.682～2.732)、距水源距离(OR值0.180,95%CI0.041～0.787)、距道路距离(OR值1.628,95%CI2.598～3.941)、隐蔽级(OR值0.911,95%CI0.857～0.967)是盘羊春季卧息地选择的主导因子。

We studied spring bed-site utilization by argali （Ovis ammon darwini） using line-transect methods in Mazong Mountain from April to May in 2010. Eighty one bed-site quadrants were measured and eighty one control quadrants were set. Comparing bed-site quadrants and control ones, we found that spring bed-sites of argali were characterized with higher altitude, sunny slope, middle slope location, high slope gradient, high percent of Reaumuria soongorica and gravel, lower plant density, far distance from road and human settlement, close distance from water source and hiding spots, as well as from high hiding cover. Results of binary logistic regression showed that eight factors played an important role in determining the bed-site utilization by argali in spring; they were altitude （OR 1. 614,95 % CI 1. 248 -4. 419 ）, slope aspect （95% CI 1. 682 - 3. 745 ） , slope location （95 % CI 0. 839 - 3. 156） , slope degree （ OR 1. 705,95 % CI 1. 227 - 2. 369 ） , vegetation type （95% CI 0. 682 - 2. 732） , distance to water source （ OR 0. 180,95% CI 0. 041 - 0. 787 ） , distances to roads （ OR 1. 628,95% CI 2. 598 - 3. 941 ） and hiding cover （ OR 0. 911,95% CI 0. 857 - 0. 967 ）.