Unveiling the hidden impact: Wildlife roadkill assessment in the Paraguayan Chaco

IF 1.6 4区 环境科学与生态学 Q3 ECOLOGY
Austral Ecology Pub Date : 2024-09-23 DOI:10.1111/aec.13599
Nicolás Martínez, Thomas Goossen-Lebrón, Frederick Bauer, Viviana Espínola, María Belén Ortiz, Larissa Oliveira Gonçalves
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引用次数: 0

Abstract

The incidence of wildlife roadkill significantly threatens the persistence of wildlife populations and disrupts the ecological functionality of ecosystems. This study investigates the impact of roadkills on wildlife in the Paraguayan Chaco, focusing on a 250-km segment of Route 9 ‘Dr. Carlos Antonio López’ between Villa Hayes and Pozo Colorado. We conducted a road survey for 15 months and recorded 2338 carcasses, identifying 87 species, with mammals (41.3%), reptiles (32.3%) and birds (19.8%) being the most observed groups. The species most frequently killed included Cerdocyon thous, Caracara plancus, Thamnodynastes hypoconia and Procyon cancrivorus. We also recorded species with conservation concern. Additionally, we estimated mortality rates by accounting for sampling errors such as carcass removal and searcher efficiency, revealing annual roadkill rates of 5183 mammals, 19 402 birds and 5020 reptiles on the 250 km per year. Spatial analysis using Ripley's K statistic and HotSpot Identification highlighted significant variation in roadkill distribution across different taxonomic groups and seasons, with 51 km of road identified as hotspots when analysing all groups together. Notably, there was minimal overlap in hotspot locations between seasons and taxonomic groups, emphasizing the need for targeted mitigation strategies. Our findings challenge previous macroecological assessments suggesting low roadkill rates in Paraguay, underscoring the importance of local studies in accurately assessing ecological impacts. This study provides critical baseline data for conservation efforts and calls for further research to develop and implement effective roadkill mitigation strategies in Latin America, especially in Chaco region.

Abstract Image

揭示隐藏的影响:巴拉圭查科地区野生动物路杀评估
野生动物路杀事件严重威胁着野生动物种群的生存,并破坏了生态系统的生态功能。本研究调查了路杀对巴拉圭查科地区野生动物的影响,重点是 Villa Hayes 和 Pozo Colorado 之间长达 250 公里的 9 号公路 "卡洛斯-安东尼奥-洛佩斯博士 "路段。我们进行了为期 15 个月的道路调查,记录了 2338 具尸体,确定了 87 个物种,其中哺乳动物(41.3%)、爬行动物(32.3%)和鸟类(19.8%)是观察到的最多的物种群。最常被杀害的物种包括 Cerdocyon thous、Caracara plancus、Thamnodynastes hypoconia 和 Procyon cancrivorus。我们还记录了受保护的物种。此外,我们还考虑了尸体清除和搜寻者效率等取样误差,对死亡率进行了估算,结果显示,在每年 250 公里的路途中,哺乳动物、鸟类和爬行动物的年路杀率分别为 5183 只、19 402 只和 5020 只。利用里普利 K 统计法和热点识别法进行的空间分析表明,不同分类群和不同季节的路杀分布存在显著差异,在对所有分类群进行综合分析时,有 51 公里的道路被确定为热点。值得注意的是,不同季节和分类群组之间的热点位置重叠极少,这强调了采取有针对性的缓解策略的必要性。我们的研究结果对之前的宏观生态评估提出了质疑,认为巴拉圭的路杀率很低,这强调了当地研究在准确评估生态影响方面的重要性。这项研究为保护工作提供了重要的基准数据,并呼吁进一步开展研究,以便在拉丁美洲(尤其是查科地区)制定和实施有效的路杀减缓战略。
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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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