Estimating the effects of roads on migration: a barren-ground caribou case study

IF 1 4区生物学 Q3 ZOOLOGY

Canadian Journal of Zoology Pub Date : 2023-12-08 DOI:10.1139/cjz-2023-0121

John G Boulanger, Robin Kite, Mitch Campbell, Jason Shaw, David Lee, Stephen Atkinson

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引用次数: 0

Abstract

A challenge for management of wildlife species is the assessment of the effect of roads on migration. We developed models to estimate the spatial (ZOI: zone of influence) and temporal (delays in migration) effects of roads, and test if road closures reduced delays in migration. We analyzed collar (2011-2019) and road survey data from 2 barren ground caribou (Rangifer tarandus groenlandicus (Borowski, 1780)) herds to assess the impact of a 171 km mine road that bisects their migration corridor. We estimated ZOI’s of 16-17 km prior to crossing the road during 2018 and 2019, and 3.0 km after crossing. Estimates of mean delay were 4.3 and 2.5 days for 2018 and 2019 which were reduced by 28-68% (1.2-1.7 days) if roads were closed when caribou were within the zone of influence. In 2017-2018, when the road was extended 64 km north, caribou were 12% less likely to deflect north around the road therefore increasing delays. Road surveys indicated aggregation of caribou prior to crossing the road, with few caribou observed after crossing, a finding supported by collar data. Our methods can estimate the spatial and temporal effects of roads for any wildlife species and assess mitigation strategies in reducing delays in migration.

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估计道路对迁徙的影响：荒原驯鹿案例研究

野生动物物种管理面临的一个挑战是评估道路对迁徙的影响。我们开发了模型来估计道路的空间(ZOI:影响区)和时间(迁移延迟)效应，并测试道路封闭是否减少了迁移延迟。我们分析了2只贫瘠地面驯鹿(Rangifer tarandus groenlandicus (Borowski, 1780))群的颈圈(2011-2019)和道路调查数据，以评估一条171公里的矿山道路对其迁徙走廊的影响。我们估计2018年和2019年期间，过马路前的ZOI为16-17公里，过马路后的ZOI为3.0公里。估计2018年和2019年的平均延误时间分别为4.3天和2.5天，如果在驯鹿在影响范围内关闭道路，延误时间将减少28-68%(1.2-1.7天)。在2017-2018年，当道路向北延伸64公里时，驯鹿向北绕行的可能性降低了12%，从而增加了延误。道路调查显示，驯鹿在过马路前聚集在一起，过马路后观察到的驯鹿很少，这一发现得到了项圈数据的支持。我们的方法可以估计道路对任何野生动物物种的时空影响，并评估减少迁徙延迟的缓解策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Canadian Journal of Zoology 生物-动物学

CiteScore

2.40

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Published since 1929, the Canadian Journal of Zoology is a monthly journal that reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.