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首页> 外文期刊>Journal of Wildlife Management >Evaluating Greater Sage-Grouse Seasonal Space Use Relative to Leks: Implications for Surface Use Designations in Sagebrush Ecosystems
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Evaluating Greater Sage-Grouse Seasonal Space Use Relative to Leks: Implications for Surface Use Designations in Sagebrush Ecosystems

机译：相对于韭菜评估更大的鼠尾草季节性空间利用：鼠尾草生态系统中表面用途名称的含义

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The development of anthropogenic structures, especially those related to energy resources, in sagebrush ecosystems is an important concern among developers, conservationists, and land managers in relation to greater sage-grouse (Centrocercus urophasianus; hereafter, sage-grouse) populations. Sage-grouse are dependent on sagebrush ecosystems to meet their seasonal life-phase requirements, and research indicates that anthropogenic structures can adversely affect sage-grouse populations. Land management agencies have attempted to reduce the negative effects of anthropogenic development by assigning surface use (SU) designations, such as no surface occupancy, to areas around leks (breeding grounds). However, rationale for the size of these areas is often challenged. To help inform this issue, we used a spatial analysis of sage-grouse utilization distributions (UDs) to quantify seasonal (spring, summer and fall, winter) sage-grouse space use in relation to leks. We sampled UDs from 193 sage-grouse (11,878 telemetry locations) across 4 subpopulations within the Bi-State Distinct Population Segment (DPS, bordering California and Nevada) during 2003-2009. We quantified the volume of each UD (vUD) within a range of areas that varied in size and were centered on leks, up to a distance of 30km from leks. We also quantified the percentage of nests within those areas. We then estimated the diminishing gains of vUD as area increased and produced continuous response curves that allow for flexibility in land management decisions. We found nearly 90% of the total vUD (all seasons combined) was contained within 5km of leks, and we identified variation in vUD for a given distance related to season and migratory status. Five kilometers also represented the 95th percentile of the distribution of nesting distances. Because diminishing gains of vUD was not substantial until distances exceeded 8km, managers should consider the theoretical optimal distances for SU designation between 5.0km and 7.5km, depending on migratory status. Although these results represent space use for sage-grouse within the Bi-State DPS, our results likely have broad relevance to other areas with similar landscape characteristics and patterns of space use
机译：鼠尾草生态系统中人为结构的发展，尤其是与能源相关的结构，是开发商，保护主义者和土地管理者关注的重要圣人-松鸡种群（Centrocercus urophasianus;此后称为圣人-松鼠）种群。鼠尾草依赖鼠尾草生态系统来满足其季节性生命周期需求，研究表明，人为结构可能会对鼠尾草种群产生不利影响。土地管理机构已尝试通过将地表用途（SU）标识（例如无地表占用）分配给韭菜周围的区域（繁殖场）来减少人为发展的负面影响。但是，这些区域的规模原理常常受到挑战。为了帮助解决这个问题，我们使用了鼠尾草利用分布（UDs）的空间分析来量化季节性（春季，夏季和秋季，冬季）鼠尾草相对于韭菜的空间利用。在2003-2009年期间，我们从193个圣贤松鸡（11,878个遥测位置）的跨州离散人群（DPS，与加利福尼亚和内华达州接壤）的4个亚人群中抽取了UD。我们在一定范围内对每个UD（vUD）的体积进行了量化，这些区域的大小各不相同，并以沥水为中心，距沥水30 km。我们还量化了这些区域内巢的百分比。然后，我们估计vUD的收益随着面积的增加而减少，并产生连续的响应曲线，从而可以灵活地进行土地管理决策。我们发现，将近90％的vUD（所有季节合并在一起）都包含在距离韭菜5公里的范围内，并且我们确定了vUD在与季节和迁徙状况相关的给定距离内的变化。五公里还代表嵌套距离分布的第95个百分点。由于直到距离超过8 km时，vUD的递减收益才是可观的，因此管理人员应根据迁移状态，将SU指定的理论最佳距离考虑在5.0 km至7.5 km之间。尽管这些结果代表了双州DPS内鼠尾草的空间利用，但我们的结果可能与具有相似景观特征和空间利用模式的其他地区具有广泛的相关性

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