Disentangling drivers of vertebrate roadkill in a protected area in the Amazon rainforest

IF 1.6 4区 环境科学与生态学 Q3 ECOLOGY
Austral Ecology Pub Date : 2024-07-30 DOI:10.1111/aec.13571
Andréa Coeli Gomes de Lucena Costa, Samuel Campos Gomides
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Abstract

Vertebrates' roadkill impacts many species in natural areas. However, data on this topic in the Amazon domain are still scarce, especially within protected areas. In this study, we analysed data from 2 years of monitoring amphibians, reptiles, mammals and birds' roadkill on five types of terrestrial transport infrastructure in a protected area in the Brazilian Amazon. We tested which vertebrate classes and feeding guilds were most recorded, the influence of seasonality and the spatial pattern of roadkill. In the studied area, 2795 roadkills were recorded, with amphibians suffering the most casualties. Most of the roadkills occurred during the rainy season (57%). Correcting the roadkill data using observer efficiency and carcass persistence time data, we concluded that mortality rates might be underestimated by up to 40 times when compared to raw data. There was no significant difference between feeding guilds concerning the number of fatalities, and rainfall and temperature significantly affected the roadkill pattern of all vertebrate classes. The spatial pattern of roadkill varied between traffic routes and vertebrate class types. The results indicate that amphibians are the most common victims of roadkill, although they are neglected in many roadkill monitoring. Consequently, mitigation strategies should prioritize periods with the highest mortality rates, as rainfall and temperature influence the frequency of these accidents. In addition, different classes of vertebrates have different patterns of impact concentration along traffic routes, which makes mitigation planning more complex. Therefore, planning to reduce vertebrate deaths from roadkill must consider each taxon's particularity and seasonality.

亚马逊热带雨林保护区脊椎动物路杀驱动因素分析
脊椎动物的路杀对自然区域的许多物种都有影响。然而,亚马逊地区有关这方面的数据仍然很少,尤其是在保护区内。在这项研究中,我们分析了两年来在巴西亚马逊的一个保护区内监测两栖动物、爬行动物、哺乳动物和鸟类在五种陆地交通基础设施上被路杀的数据。我们测试了记录最多的脊椎动物类别和觅食类群、季节性的影响以及路杀的空间模式。在研究区域内,共记录到 2795 起路杀事件,其中两栖动物伤亡最大。大部分路杀发生在雨季(57%)。利用观察效率和尸体存留时间数据对路杀数据进行修正后,我们得出结论,与原始数据相比,死亡率可能被低估了多达 40 倍。在死亡数量方面,不同捕食类别之间没有明显差异,降雨和温度对所有脊椎动物类别的路杀模式都有显著影响。不同交通路线和不同脊椎动物类别之间的路杀空间模式各不相同。结果表明,两栖动物是最常见的路杀受害者,尽管它们在许多路杀监测中被忽视了。因此,缓解策略应优先考虑死亡率最高的时期,因为降雨和温度会影响这些事故的发生频率。此外,不同类别的脊椎动物在交通路线上的影响集中模式也不尽相同,这使得减缓规划变得更加复杂。因此,减少脊椎动物死于公路死亡的规划必须考虑每个分类群的特殊性和季节性。
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来源期刊
Austral Ecology
Austral Ecology 环境科学-生态学
CiteScore
2.90
自引率
6.70%
发文量
117
审稿时长
12-24 weeks
期刊介绍: Austral Ecology is the premier journal for basic and applied ecology in the Southern Hemisphere. As the official Journal of The Ecological Society of Australia (ESA), Austral Ecology addresses the commonality between ecosystems in Australia and many parts of southern Africa, South America, New Zealand and Oceania. For example many species in the unique biotas of these regions share common Gondwana ancestors. ESA''s aim is to publish innovative research to encourage the sharing of information and experiences that enrich the understanding of the ecology of the Southern Hemisphere. Austral Ecology involves an editorial board with representatives from Australia, South Africa, New Zealand, Brazil and Argentina. These representatives provide expert opinions, access to qualified reviewers and act as a focus for attracting a wide range of contributions from countries across the region. Austral Ecology publishes original papers describing experimental, observational or theoretical studies on terrestrial, marine or freshwater systems, which are considered without taxonomic bias. Special thematic issues are published regularly, including symposia on the ecology of estuaries and soft sediment habitats, freshwater systems and coral reef fish.
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