Modeling the potential distribution of the threatened Grey-necked Picathartes Picathartes oreas across its entire range
Modeling the potential distribution of the threatened Grey-necked Picathartes Picathartes oreas across its entire range
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DOI：
10.1017/s0959270923000175
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发表时间：
2023-06-15
影响因子：
1.6
通讯作者：
Whytock，Robin C.
中科院分区：
文献类型：
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作者：
Tsetagho，Guilain;Bradfer-Lawrence，Tom;Whytock，Robin C.
了解适宜生境的分布和范围对于保护濒危和特有类群至关重要。这种知识对许多中非物种来说是有限的，包括稀有和全球受威胁的灰颈Picathartes Picathartes oreas，这是中部非洲森林特有的Picathartidae家族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区域森林覆盖的破碎和丧失，但无论是适当生境的范围还是潜在物种的分布都不为人所知。我们结合联合收割机339（新的和历史的）发生记录的灰颈皮卡与环境变量的潜在全球分布模型。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Picathartes分布与陡峭的山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。我们预测该物种的适宜栖息地为17，327平方公里，其中只有2，490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，预测的灰颈皮卡塔特适宜栖息地的全球分布比以前认为的要小。这项工作为修订国际自然保护联盟（IUCN）红色名录状态提供了证据，并可能保证将该物种的状态从“近危”升级为“易危”。
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”.