Identifying and prioritizing ungulate migration routes for landscape-level conservation.
Identifying and prioritizing ungulate migration routes for landscape-level conservation.
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DOI：
10.1890/08-2034.1
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发表时间：
2009-12
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影响因子：
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通讯作者：
H. Sawyer;M. Kauffman;R. Nielson;Jon S. Horne
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文献类型：
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作者：
H. Sawyer;M. Kauffman;R. Nielson;Jon S. Horne
随着有蹄类动物栖息地丧失和破碎化的增加，确定和优先考虑保护迁徙路线已成为新的紧迫性。在这里，我们提出了一个通用的框架，使用布朗桥运动模型（BBMM）：（1）提供了一个概率估计的抽样人口的迁移路线，（2）区分路线段，功能作为中途停留的网站与那些主要用作移动走廊，（3）优先保护的基础上，使用它们的抽样人口的比例。我们采用这种方法迁移骡鹿（Odocoileus hemionus）人口在西南部的原始地区的怀俄明州，美国，其中2000天然气威尔斯和1609公里的管道和道路已被提出的发展。我们的分析清楚地描绘了相对于拟议开发的迁移路线，并为实地保护工作提供了指导。骡鹿迁徙路线的特点是有一系列的中途停留地点，鹿在那里度过了大部分时间，并通过运动走廊连接起来，鹿通过这些走廊快速移动。我们的研究结果表明，管理策略，中途停留地点和运动走廊之间的区别可能是必要的。由于一些迁移路线被更多的黑尾鹿比其他人使用，比例的使用水平可以提供一个合理的度量，通过该度量，路线可以优先进行保护。我们概述的方法应该适用于广泛的物种，栖息在迁徙路线受到威胁或知之甚少的地区。
As habitat loss and fragmentation increase across ungulate ranges, identifying and prioritizing migration routes for conservation has taken on new urgency. Here we present a general framework using the Brownian bridge movement model (BBMM) that: (1) provides a probabilistic estimate of the migration routes of a sampled population, (2) distinguishes between route segments that function as stopover sites vs. those used primarily as movement corridors, and (3) prioritizes routes for conservation based upon the proportion of the sampled population that uses them. We applied this approach to a migratory mule deer (Odocoileus hemionus) population in a pristine area of southwest Wyoming, USA, where 2000 gas wells and 1609 km of pipelines and roads have been proposed for development. Our analysis clearly delineated where migration routes occurred relative to proposed development and provided guidance for on-the-ground conservation efforts. Mule deer migration routes were characterized by a series of stopover sites where deer spent most of their time, connected by movement corridors through which deer moved quickly. Our findings suggest management strategies that differentiate between stopover sites and movement corridors may be warranted. Because some migration routes were used by more mule deer than others, proportional level of use may provide a reasonable metric by which routes can be prioritized for conservation. The methods we outline should be applicable to a wide range of species that inhabit regions where migration routes are threatened or poorly understood.