Zambian Carnivore Programme, P.O. Box 80, Mfuwe, Eastern Province, Zambia.
Department of Ecology, Montana State University, Bozeman, MT, 59717, USA.
Sci Rep. 2020 Oct 21;10(1):17908. doi: 10.1038/s41598-020-74329-w.
Large carnivores have experienced considerable range contraction, increasing the importance of movement across human-altered landscapes between small, isolated populations. African wild dogs (Lycaon pictus) are exceptionally wide-ranging, and recolonization is an important element of their persistence at broad scales. The competition-movement-connection hypothesis suggests that adaptations to move through areas that are unfavorable due to dominant competitors might promote the ability of subordinate competitors (like wild dogs) to move through areas that are unfavorable due to humans. Here, we used hidden Markov models to test how wild dog movements were affected by the Human Footprint Index in areas inside and outside of South Luangwa National Park. Movements were faster and more directed when outside the National Park, but slowed where the human footprint was stronger. Our results can be directly and quantitatively applied to connectivity planning, and we use them to identify ways to better understand differences between species in recent loss of connectivity.
大型食肉动物的活动范围已经大大缩小,因此它们在人类活动影响下的景观中,从孤立的小种群之间进行迁移变得尤为重要。非洲野犬(Lycaon pictus)的活动范围极广,重新引入是其在广泛范围内生存的重要因素。竞争-运动-联系假说表明,适应在因优势竞争者而变得不利的区域中移动,可能会促进从属竞争者(如野犬)在因人类而变得不利的区域中移动的能力。在这里,我们使用隐马尔可夫模型来测试野狗的运动如何受到南卢安瓜国家公园内外人类足迹指数的影响。在国家公园外,运动速度更快,方向更明确,但在人类足迹更强的地方,运动速度会减慢。我们的研究结果可以直接和定量地应用于连通性规划,我们可以用它们来确定如何更好地理解最近连通性丧失中不同物种之间的差异。