Camera-trapping reveals both defaunation and conservation priority species in an unprotected forest in Vietnam

IF 3.5 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Anh Tuan Nguyen , An Nguyen , Minh Le , Andreas Wilting , Andrew Tilker
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引用次数: 0

Abstract

The ongoing decline of global biodiversity has prompted calls for an increase in protected area coverage. However, decisions on where to expand protected areas for optimal conservation impact are often hampered by an incomplete knowledge of biodiversity, especially in the tropics. In Vietnam, many unprotected forest areas have never had standardized biodiversity surveys, and much remains unknown about the status of conservation-priority species in these areas. We conducted systematic landscape-scale camera-trapping in an unprotected forest in central Vietnam with the goal of assessing the status and distribution of ground-dwelling mammal and bird communities, especially threatened and Annamite endemic species. We analyzed occurrence data within an occupancy framework to further characterize these communities and establish a baseline for potential long-term monitoring. We also assessed the completeness of the mammal and bird communities compared to historical reference communities using a defaunation index. In total, we recorded 21 terrestrial mammals and birds over 6156 camera-trap days, including one Annamite endemic and six species listed as threatened on The IUCN Red List of Threatened Species. We included 16 mammals and birds in the occupancy models, which showed high heterogeneity in both occupancy and detection estimates, with predicted occupancy for one priority species (Annamite striped rabbit) comparable to one other protected area in the region. However, despite the presence of several conservation priority species, the forest area has undergone high levels of defaunation, as evidenced by the failure to record 55 % of the historical faunal community. The historical defaunation index values showed the highest values for the carnivore guild, and for large (>100 kg) species. We discuss our findings within the context of the importance of this area for the protection of conservation-priority species and potential future gazettement, and the usefulness of systematic landscape-scale surveys to fully assess biodiversity in forested regions that are outside the protected area system in Vietnam and beyond.
摄像机捕捉显示了越南一个未受保护的森林中退化和保护重点物种
全球生物多样性的持续下降促使人们呼吁增加保护区的覆盖范围。然而,关于在哪里扩大保护区以获得最佳保护效果的决定往往受到对生物多样性,特别是热带地区生物多样性不完整知识的阻碍。在越南,许多未受保护的森林地区从未进行过标准化的生物多样性调查,对这些地区优先保护物种的状况仍然知之甚少。我们在越南中部的一个未受保护的森林中进行了系统的景观尺度相机捕获,目的是评估地面栖息哺乳动物和鸟类群落的状况和分布,特别是濒危和安南特有物种。我们在占用框架内分析了发生数据,以进一步表征这些社区,并为潜在的长期监测建立基线。我们还利用退化指数(defaation index)评估了哺乳动物和鸟类群落与历史参考群落的完整性。在6156天的时间里,我们总共记录了21种陆生哺乳动物和鸟类,其中包括一种安南特有物种和六种被列入世界自然保护联盟濒危物种红色名录的物种。我们在占用模型中纳入了16种哺乳动物和鸟类,在占用和检测估计上都显示出高度的异质性,其中一个优先物种(安南条纹兔)的预测占用与该地区其他一个保护区相当。然而,尽管存在一些优先保护的物种,森林地区经历了高度的退化,未能记录55 %的历史动物群落就是证据。历史衰减指数在食肉类种群和大型(100 kg)种群中最高。我们讨论了该地区对保护优先物种的保护和潜在的未来公告的重要性,以及系统景观尺度调查对全面评估越南和其他国家保护区系统外森林地区生物多样性的有用性。
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来源期刊
Global Ecology and Conservation
Global Ecology and Conservation Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.10
自引率
5.00%
发文量
346
审稿时长
83 days
期刊介绍: Global Ecology and Conservation is a peer-reviewed, open-access journal covering all sub-disciplines of ecological and conservation science: from theory to practice, from molecules to ecosystems, from regional to global. The fields covered include: organismal, population, community, and ecosystem ecology; physiological, evolutionary, and behavioral ecology; and conservation science.
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