Modeling the potential distribution of the threatened Grey-necked Picathartes Picathartes oreas across its entire range

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION Bird Conservation International Pub Date : 2023-06-15 DOI:10.1017/S0959270923000175
Guilain Tsetagho, Tom Bradfer‐Lawrence, Awa II Taku, K. Abernethy, E. E. Abwe, E. Tsi Angwafo, F. Atuo, Martin Fichtler, R. Fotso, M. Shirley, Bethan J. Morgan, M. Languy, F. Maisels, R. Oslisly, Luke L. Powell, T. Smith, H. Thomassen, M. Waltert, Jared D. Wolfe, R. Whytock
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Abstract

Summary Understanding the distribution and extent of suitable habitats is critical for the conservation of endangered and endemic taxa. Such knowledge is limited for many Central African species, including the rare and globally threatened Grey-necked Picathartes Picathartes oreas, one of only two species in the family Picathartidae endemic to the forests of Central Africa. Despite growing concerns about land-use change resulting in fragmentation and loss of forest cover in the region, neither the extent of suitable habitat nor the potential species’ distribution is well known. We combine 339 (new and historical) occurrence records of Grey-necked Picathartes with environmental variables to model the potential global distribution. We used a Maximum Entropy modelling approach that accounted for sampling bias. Our model suggests that Grey-necked Picathartes distribution is strongly associated with steeper slopes and high levels of forest cover, while bioclimatic, vegetation health, and habitat condition variables were all excluded from the final model. We predicted 17,327 km2 of suitable habitat for the species, of which only 2,490 km2 (14.4%) are within protected areas where conservation designations are strictly enforced. These findings show a smaller global distribution of predicted suitable habitat forthe Grey-necked Picathartes than previously thought. This work provides evidence to inform a revision of the International Union for Conservation of Nature (IUCN) Red List status, and may warrant upgrading the status of the species from “Near Threatened” to “Vulnerable”.
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模拟受威胁的灰颈云杉在其整个范围内的潜在分布
了解合适栖息地的分布和范围对于保护濒危和特有类群至关重要。对于许多中非物种来说,这种知识是有限的,包括罕见的、受到全球威胁的灰颈皮蛛,它是中非森林特有的皮蛛科中仅有的两个物种之一。尽管人们越来越担心土地使用的变化会导致该地区森林覆盖的破碎和丧失,但无论是合适栖息地的范围还是潜在物种的分布都不为人所知。我们将339个灰颈云杉(新的和历史的)发生记录与环境变量相结合,对潜在的全球分布进行建模。我们使用了最大熵建模方法,该方法考虑了采样偏差。我们的模型表明,灰颈云杉的分布与更陡的斜坡和高水平的森林覆盖密切相关,而生物气候、植被健康和栖息地条件变量都被排除在最终模型之外。我们预测该物种有17327平方公里的合适栖息地,其中只有2490平方公里(14.4%)位于严格执行保护指定的保护区内。这些发现表明,预测的灰颈云杉适宜栖息地的全球分布比之前认为的要小。这项工作为国际自然保护联盟(IUCN)红色名录的修订提供了证据,并可能有理由将该物种的地位从“近危”提升为“易危”。
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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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