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Determining carnivore habitat use in a rubber/forest landscape in Brazil using multispecies occupancy models

机译:使用多物种占用模型确定巴西橡胶/森林景观中食肉动物的栖息地用途

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摘要

Understanding the factors that influence the presence and distribution of carnivores in human-dominated agricultural landscapes is one of the main challenges for biodiversity conservation, especially in landscapes where setting aside large protected areas is not feasible. Habitat use models of carnivore communities in rubber plantations are lacking despite the critical roles carnivores play in structuring ecosystems and the increasing expansion of rubber plantations. We investigated the habitat use of a mammalian carnivore community within a 4,200-ha rubber plantation/forest landscape in Bahia, Brazil. We placed two different brands of camera traps in a 90-site grid. We used a multispecies occupancy model to determine the probabilities of habitat use by each species and the effect of different brands of camera traps on their detection probabilities. Species showed significant differences in habitat use with domestic dogs (Canis familiaris) and crab-eating foxes (Cerdocyon thous) having higher probabilities of using rubber groves and coatis (Nasua nasua) having a higher probability of using forest. The moderate level of captures and low detection probabilities (≤ 0.1) of tayras (Eira barbara) and wildcats (Leopardus spp.) precluded a precise estimation of habitat use probabilities using the multispecies occupancy model. The different brands of camera traps had a significant effect on the detection probability of all species. Given that the carnivore community has persisted in this 70-year-old landscape, the results show the potential of rubber/forest landscapes to provide for the long-term conservation of carnivore communities in the Atlantic forest, especially in mosaics with 30–40% forest cover and guard patrolling systems. The results also provide insights for mitigating the impact of rubber production on biodiversity.
机译:理解影响食肉动物在人类占主导的农业景观中的存在和分布的因素,是生物多样性保护的主要挑战之一,尤其是在不存在大型保护区的景观中。尽管食肉动物在构建生态系统和橡胶种植园日益扩大的过程中发挥着关键作用,但缺少橡胶种植园食肉动物群落的栖息地使用模型。我们调查了巴西巴伊亚州4,200公顷的橡胶种植园/森林景观中一个哺乳动物食肉动物群落的栖息地利用情况。我们在90个站点的网格中放置了两个不同品牌的相机陷阱。我们使用了一个多物种占用模型来确定每种物种使用栖息地的可能性以及不同品牌的相机陷阱对其检测概率的影响。物种显示出与使用犬类的可能性较高的家养犬(Canis熟悉的犬)和食蟹的狐狸(Cerdocyon thous)之间的差异,而使用森林的可能性较高。泰拉(Eira barbara)和野猫(Leopardus spp。)的中等捕获水平和低检测概率(≤0.1)排除了使用多物种占用模型精确评估栖息地使用概率的可能性。不同品牌的相机陷阱对所有物种的检测概率都有重大影响。鉴于食肉动物群落在这一具有70年历史的景观中一直存在,结果表明橡胶/森林景观具有为大西洋森林的食肉动物群落提供长期保护的潜力,尤其是在30%至40%的马赛克中森林覆盖和警卫巡逻系统。结果还为减轻橡胶生产对生物多样性的影响提供了见识。

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