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| 图牧吉保护区大鸨冬春季生境选择 | |
| 引用本文： | 刘金成,田秀华,周景英,于建华.图牧吉保护区大鸨冬春季生境选择[J].东北林业大学学报,2008,36(7). |
| 作者姓名： | 刘金成 田秀华 周景英 于建华 |
| 作者单位： | 1. 华南濒危动物研究所,广州,510260 2. 东北林业大学 3. 内蒙古图牧吉国家级保护区 4. 大庆出入境检验检疫局 |
| 摘 要： | 2006年2—4月,对分布于内蒙古扎赉特旗图牧吉周围的大鸨(Great bustard)的生境选择特征进行了分析。随机跟踪正在取食的大鸨或者根据取食痕迹,确定大鸨选择的生境位置,生境因子选取:海拔高度、生境长度、生境宽度、生境面积、生境类型、坡位、坡向、坡度、距最近草丛的距离、距最近林区距离、距最近水源距离、距最近道路距离、人为干扰距离、植被高度、植被类型。利用系统取样的样线法调查整个研究区域环境变量的特征。共获得95个样方,样方中有大鸨出现的定义为活动地40个,赋值为1;反之为非活动地55个,赋值为0。通过逐步线性回归建立大鸨冬春季取食生境选择的预测模型。结果表明:取食生境中大鸨对黄豆地有着很强的偏好性,取食农田的面积要能满足对开阔度的需求,同时取食生境有一定的坡度,有利于遇到险情时迅速起飞。在综合比较各种模型的基础上,确定以三次曲线作为夜栖地模型。大鸨对夜栖地的选择,主要是要求其有适合的草高。 |
| 关 键 词： | 大鸨 生境选择 主成分分析 线性回归 |
Habitat Selection of Great Bustard in Tumuji during Winter and Spring |
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| Liu Jincheng,Tian Xiuhua,Zhou Jingying,Yu Jianhua.Habitat Selection of Great Bustard in Tumuji during Winter and Spring[J].Journal of Northeast Forestry University,2008,36(7). | |
| Authors: | Liu Jincheng Tian Xiuhua Zhou Jingying Yu Jianhua |
| Abstract: | A survey was conducted to study the habitat characteristics of Great Bustard around Tumuji Nature Reserve of Zhalaiteqi in Inner Mongolia from February to April in 2006. The accurate positions of the habitat of Great Bustard could be obtained by randomly tracking the populations when they were feeding in farm, or by the traces after they fed. Some habitat factors were chosen to study the habitat characteristics of Great Bustard, such as elevation, habitat length, habitat breadth, habitat area, habitat type, slope aspect, slope direction, slope gradient, distance away from the nearest brushwood, etc. Line transects of systematic sampling were used to survey the fundamental characteristics of the environmental variables. Ninety-five major quadrants were obtained including 40 active major quadrants valued 1 and 55 inactive major quadrants valued 0. A predictive model of habitat selection for Great Bustards during winter and spring was derived by linear-regression. Result shows that Great Bustards especially prefer soybean, and the area of feeding farmlands should be open enough, the slope gradient of which should be at certain degree, so that they can fly away quickly when they meet with dangerous conditions. Cubic curves could be used to predict the roost-site of Great Bustard. Roost-sites choice of Great Bustards is simplex, and they mainly need conformable vegetation height. |
| Keywords: | Great bustards Habitat selection Principal components analysis Linear regression |
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