The Alagoas Antwren Myrmotherula snowi is in imminent danger of extinction

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION Bird Conservation International Pub Date : 2024-04-25 DOI:10.1017/s0959270924000078
Hermínio A. L. S. Vilela, Arthur B. Andrade, Helder F. P. Araujo, Tony A. Bichinski, Bárbara Cavalcante, Pedro F. Develey, Alice Reisfeld, Benjamin T. Phalan
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Abstract

Summary The “Critically Endangered” Alagoas Antwren Myrmotherula snowi is found only in the Atlantic Rainforest of north-east Brazil. We surveyed all sites where the species has been recorded, as well as 15 other potential sites. We summarise all observations of the species, focusing on the period from 2016 onwards, and including systematic censuses in three breeding seasons (October–March 2018/19, 2019/20, and 2020/21) at the type locality, Murici, where we also searched for nests of the species. We did not locate any individuals at sites other than Murici. The number of apparent individuals detected declined by 67% over seven years (a decline of 50% over the three years in which standardised systematic counts were made), and only six adults were observed in the most recent breeding season. The global population is now likely to be in single-digit figures. Of five nests found, four failed, through predation by snakes and opossums, and abandonment. We installed protective barriers to protect two of these nests from predators, which may have contributed to the single successful fledging. Such methods offer most hope for now of stalling the decline. Efforts to develop captive breeding methods with model species have been underway since 2019 but face many difficulties. Improving habitat protection and restoration is crucial but will only take effect in the long term.
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Alagoas Antwren Myrmotherula snowi 濒临灭绝的危险
摘要 "极度濒危 "的阿拉戈斯鹪鹩(Myrmotherula snowi)仅分布在巴西东北部的大西洋雨林中。我们调查了有该物种记录的所有地点以及其他 15 个潜在地点。我们总结了对该物种的所有观察结果,重点关注 2016 年以来的观察结果,包括在模式产地 Murici 的三个繁殖季节(2018/19 年 10 月至 3 月、2019/20 年 10 月至 3 月和 2020/21 年 10 月至 3 月)的系统普查,我们还在那里寻找了该物种的巢穴。在穆里奇以外的地点,我们没有发现任何个体。七年来发现的明显个体数量下降了 67%(在进行标准化系统计数的三年中下降了 50%),在最近的繁殖季节仅观察到六只成鸟。现在全球种群数量可能只有个位数。在发现的 5 个巢中,有 4 个因被蛇和负鼠捕食和遗弃而失败。我们安装了保护屏障,以保护其中两个巢免遭捕食,这可能是唯一一个成功羽化的原因。这些方法是目前阻止雏鸟数量下降的最大希望。自 2019 年以来,我们一直在努力开发示范物种的人工繁殖方法,但面临着许多困难。改善栖息地的保护和恢复至关重要,但只有在长期内才能见效。
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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
50
审稿时长
>12 weeks
期刊介绍: Bird Conservation International is a quarterly peer-reviewed journal that seeks to promote worldwide research and action for the conservation of birds and the habitats upon which they depend. The official journal of BirdLife International, it provides stimulating, international and up-to-date coverage of a broad range of conservation topics, using birds to illuminate wider issues of biodiversity, conservation and sustainable resource use. It publishes original papers and reviews, including targeted articles and recommendations by leading experts.
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