Penjor Ugyen, Macdonald David W, Wangchuk Sonam, Tandin Tandin, Tan Cedric Kai Wei
Wildlife Conservation Research Unit Department of Zoology University of Oxford, The Recanati-Kaplan Centre Tubney Oxfordshire UK.
Nature Conservation Division Department of Forests and Park Services Ministry of Agriculture and Forests Thimphu Bhutan.
Ecol Evol. 2018 Apr 2;8(8):4278-4291. doi: 10.1002/ece3.3970. eCollection 2018 Apr.
The survival of large carnivores is increasingly precarious due to extensive human development that causes the habitat loss and fragmentation. Habitat selection is influenced by anthropogenic as well as environmental factors, and understanding these relationships is important for conservation management. We assessed the environmental and anthropogenic variables that influence site use of clouded leopard in Bhutan, estimated their population density, and used the results to predict the species' site use across Bhutan. We used a large camera-trap dataset from the national tiger survey to estimate for clouded leopards, for the first time in Bhutan, (1) population density using spatially explicit capture-recapture models and (2) site-use probability using occupancy models accounting for spatial autocorrelation. Population density was estimated at D^Bayesian=0.40 (0.10 ) and D^maximum-likelihood=0.30 (0.12 ) per 100 km. Clouded leopard site use was positively associated with forest cover and distance to river while negatively associated with elevation. Mean site-use probability (from the Bayesian spatial model) was ψ^spatial=0.448 (0.076 ). When spatial autocorrelation was ignored, the probability of site use was overestimated, ψ^nonspatial=0.826 (0.066 ). Predictive mapping allowed us to identify important conservation areas and priority habitats to sustain the future of these elusive, ambassador felids and associated guilds. Multiple sites in the south, many of them outside of protected areas, were identified as habitats suitable for this species, adding evidence to conservation planning for clouded leopards in continental South Asia.
由于广泛的人类发展导致栖息地丧失和破碎化,大型食肉动物的生存愈发岌岌可危。栖息地选择受到人为因素和环境因素的影响,了解这些关系对于保护管理至关重要。我们评估了影响不丹云豹栖息地利用的环境和人为变量,估计了它们的种群密度,并利用结果预测了该物种在不丹的栖息地利用情况。我们使用了来自全国老虎调查的大型相机陷阱数据集,首次在不丹对云豹进行了以下估计:(1) 使用空间明确的捕获-再捕获模型估计种群密度,(2) 使用考虑空间自相关的占用模型估计栖息地利用概率。估计的种群密度为每100平方公里贝叶斯估计值(D = 0.40(0.10)),最大似然估计值(D = 0.30(0.12))。云豹的栖息地利用与森林覆盖率和距河流的距离呈正相关,与海拔呈负相关。平均栖息地利用概率(来自贝叶斯空间模型)为(\psi^{空间}=0.448(0.076))。当忽略空间自相关时,栖息地利用概率被高估,(\psi^{非空间}=0.826(0.066))。预测性绘图使我们能够确定重要的保护区和优先栖息地,以维持这些 elusive(难以捉摸的)大使级猫科动物及其相关群落的未来。南部的多个地点,其中许多在保护区之外,被确定为适合该物种的栖息地,为南亚大陆云豹的保护规划增添了证据。