Morris Shane D, Johnson Christopher N, Brook Barry W
School of Natural Sciences, University of Tasmania, Private Bag 55, Hobart, Tasmania 7001, Australia.
ARC Centre of Excellence for Australian Biodiversity and Heritage, University of Tasmania, Hobart, Tasmania 7001, Australia.
R Soc Open Sci. 2020 Dec 23;7(12):201603. doi: 10.1098/rsos.201603. eCollection 2020 Dec.
Translocations-the movement of species from one place to another-are likely to become more common as conservation attempts to protect small isolated populations from threats posed by extreme events such as bushfires. The recent Australian mega-fires burnt almost 40% of the habitat of the brush-tailed rock-wallaby (), a threatened species whose distribution is already restricted, primarily due to predation by invasive species. This chronic threat of over-predation, coupled with the possible extinction of the genetically distinct southern population (approx. 40 individuals in the wild), makes this species a candidate for a conservation translocation. Here, we use species distribution models to identify translocation sites for the brush-tailed rock-wallaby. Our models exhibited high predictive accuracy, and show that terrain roughness, a surrogate for predator refugia, is the most important variable. Tasmania, which currently has no rock-wallabies, showed high suitability and is fox-free, making it a promising candidate site. We outline our argument for the trial translocation of rock-wallaby to Maria Island, located off Tasmania's eastern coast. This research offers a transparent assessment of the translocation potential of a threatened species, which can be adapted to other taxa and systems.
物种转移——即物种从一个地方迁移到另一个地方——可能会变得越来越普遍,因为保护工作试图保护小型孤立种群免受诸如丛林大火等极端事件带来的威胁。最近澳大利亚的特大火灾烧毁了刷尾岩袋鼠栖息地的近40%,刷尾岩袋鼠是一种濒危物种,其分布已经受到限制,主要原因是受到入侵物种的捕食。这种长期的过度捕食威胁,再加上基因独特的南部种群(约40只野生个体)可能灭绝,使得该物种成为保护转移的候选对象。在此,我们使用物种分布模型来确定刷尾岩袋鼠的转移地点。我们的模型显示出很高的预测准确性,并表明地形粗糙度(作为捕食者避难所的替代指标)是最重要的变量。目前没有岩袋鼠的塔斯马尼亚显示出高度适宜性且没有狐狸,使其成为一个有前景的候选地点。我们概述了将岩袋鼠转移到位于塔斯马尼亚东海岸外的玛丽亚岛进行试验性转移的理由。这项研究对一个濒危物种的转移潜力进行了透明评估,该评估可适用于其他分类群和系统。