Multi-level, multi-scale habitat selection by a wide-ranging, federally threatened snake
Multi-level, multi-scale habitat selection by a wide-ranging, federally threatened snake
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DOI：
10.1007/s10980-018-0631-2
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发表时间：
2018-05-01
影响因子：
5.2
通讯作者：
McGarigal, Kevin
中科院分区：
文献类型：
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作者：
Bauder, Javan M.;Breininger, David R.;McGarigal, Kevin
尽管多尺度方法通常用于评估野生动物与栖息地的关系，但很少有研究在不同层次/选择顺序的多个空间尺度上考察选择[sensu Johnson's (1980) orders of selection]。未能在单一选择水平内解释多尺度关系可能导致误导性推论和预测。目的研究佛罗里达半岛受联邦威胁的东部靛蓝蛇（Drymarchon couperi）在原居范围（二级选择）和个体遥测位置（三级选择）水平上的栖息地选择，以确定有影响的栖息地协变量，并预测选择的相对概率。方法在每一层次内，确定各生境协变量的特征尺度，建立多尺度资源选择函数。我们使用家园范围选择函数来模拟第二级选择，并使用配对逻辑回归来模拟第三级选择。结果在两个层次上，环境影响评价均选择了未开发的高地地被和生境边缘，而未选择城市地被。在最精细的尺度上，选择通常是最强的，除了二级城市边缘，二级城市边缘在大尺度上被避免，这表明避免城市化土地覆盖而不是城市边缘本身。本研究阐明了在单一选择水平下特征尺度的变化，并证明了多层次、尺度优化的生境选择分析的实用性。我们强调维护大型马赛克自然栖息地对东部靛蓝蛇保护的重要性。
Context Although multi-scale approaches are commonly used to assess wildlife-habitat relationships, few studies have examined selection at multiple spatial scales within different hierarchical levels/orders of selection [sensu Johnson's (1980) orders of selection]. Failure to account for multi-scale relationships within a single level of selection may lead to misleading inferences and predictions.Objectives We examined habitat selection of the federally threatened eastern indigo snake (Drymarchon couperi) in peninsular Florida at the level of the home range (Level II selection) and individual telemetry location (Level III selection) to identify influential habitat covariates and predict relative probability of selection.Methods Within each level, we identified the characteristic scale for each habitat covariate to create multi-scale resource selection functions. We used home range selection functions to model Level II selection and paired logistic regression to model Level III selection.Results At both levels, EIS selected undeveloped upland land covers and habitat edges while avoiding urban land covers. Selection was generally strongest at the finest scales with the exception of Level II urban edge which was avoided at a broad scale indicating avoidance of urbanized land covers rather than urban edge per se.Conclusions Our study illustrates how characteristic scales may vary within a single level of selection and demonstrates the utility of multi-level, scale-optimized habitat selection analyses. We emphasize the importance of maintaining large mosaics of natural habitats for eastern indigo snake conservation.