Habitat suitability and influencing factors of a threatened highland flagship species, the Black-necked Crane (Grus nigricollis)

IF 1.6 2区 生物学 Q1 ORNITHOLOGY
Hongying Xu , Ru Jia , Hongrui Lv , Ge Sun , Dongping Liu , Hongyan Yu , Cunxin Ma , Tian Ma , Wenhong Deng , Guogang Zhang
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Abstract

Evaluating the habitat suitability of flagship species and its key influencing factors is vital for understanding potential conservation issues and developing coping strategies. We surveyed the wintering population size and distribution of the Black-necked Crane (Grus nigricollis) in the Yarlung Zangbo River Basin (YZRB) from 10 to 29 January 2022, and predicted the current potentially suitable habitat distribution and its effective factors using the MaxEnt model. A total of 9337 wintering Black-necked Cranes were recorded in the YZRB in 2022, 76.58 % of which were primarily found in Lhunzub, Samzhubze, Namling, and Lhaze. Compared to 2018, the crane population has exhibited a notable decline in Samzhubze and Taktse, likely due to farmland plowing, winter irrigation, changes in agricultural practices, road construction and hydraulic projects. The crane population within various counties exhibited a significant positive correlation with the suitable habitat area (r = 0.70, P = 0.002, n = 17). We also found that the currently suitable habitat area covered 17,204 km2, of which only 3244 km2 (18.86 %) was effectively protected at the national level, which was predominantly distributed in farmland and rangeland habitats characterized by gentle slopes, altitudes not exceeding 4500 m, and proximity to human settlements along rivers, where suitable isothermal values (51) and less seasonal precipitation (20 mm) prevail. Our study will be helpful for formulating reasonable conservation strategies to protect the core population of this threatened highland flagship species.
高原濒危旗舰种黑颈鹤生境适宜性及其影响因素
评估旗舰物种的生境适宜性及其关键影响因素对于了解潜在的保护问题和制定应对策略至关重要。对雅鲁藏布江流域黑颈鹤(Grus nigricollis)于2022年1月10日至29日越冬种群数量和分布进行了调查,并利用MaxEnt模型预测了当前潜在适宜生境分布及其影响因素。2022年内蒙古自治区共录得越冬黑颈鹤9337只,其中76.58%主要分布在鲁伦祖布、三竹则、南岭和拉泽。与2018年相比,Samzhubze和Taktse的鹤类数量明显下降,这可能是由于农田耕作、冬季灌溉、农业实践的变化、道路建设和水利工程。各县鹤种群数量与适宜生境面积呈显著正相关(r = 0.70, P = 0.002, n = 17)。目前适宜生境面积为17204 km2,其中国家级有效保护面积仅为3244 km2(18.86%),主要分布在坡度平缓、海拔不超过4500 m、靠近河流人居环境的农田和牧场生境,适宜等温线值为51,季节性降水较少(20 mm)。本研究将有助于制定合理的保护策略,保护这一濒危高地旗舰物种的核心种群。
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来源期刊
Avian Research
Avian Research ORNITHOLOGY-
CiteScore
2.90
自引率
16.70%
发文量
456
审稿时长
46 days
期刊介绍: Avian Research is an open access, peer-reviewed journal publishing high quality research and review articles on all aspects of ornithology from all over the world. It aims to report the latest and most significant progress in ornithology and to encourage exchange of ideas among international ornithologists. As an open access journal, Avian Research provides a unique opportunity to publish high quality contents that will be internationally accessible to any reader at no cost.
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