摘要
由于栖息地质量下降,近年来齿突蟾属物种种群数量急剧减少,明确齿突蟾属物种空间分布,是监测、管理、保护齿突蟾属物种的基础。横断山区可能是齿突蟾属的起源中心和分化中心,但齿突蟾属在横断山区的地理分布格局尚不明确。利用优化后Maxent模型,首次预测西藏齿突蟾Scutiger boulengeri、刺胸齿突蟾Scutiger mammatus、胸腺齿突蟾Scutiger glandulatus、圆疣齿突蟾Scutiger tuberculatus、贡山齿突蟾Scutiger gongshanensis 5种高海拔齿突蟾属物种在横断山南生物多样性保护优先区域的潜在地理分布,并分析其与环境因子的关系。结果显示,5种齿突蟾属物种在横断山南的潜在地理分布格局存在差异,西藏齿突蟾主要分布在横断山南的北部,圆疣齿突蟾主要分布在横断山南东北部的四川省境内,贡山齿突蟾主要分布在横断山南的西南部,刺胸齿突蟾和胸腺齿突蟾的潜在分布格局较为相似,在横断山南的中部、西北部地区都有较多分布,但胸腺齿突蟾潜在分布区更为碎片化。另外,横断山南北部地区的齿突蟾属丰富度明显高于南部地区。环境变量贡献率和刀切法结果显示温度因子和降水因子是决定横断山南齿突蟾属潜在分布的主要因素,最冷季降水量对西藏齿突蟾、贡山齿突蟾、圆疣齿突蟾潜在分布有重要影响,但它们对最冷季降水量的偏好存在差异。此外,研究也显示,通过评估潜在的Maxent参数组合,选择最佳的Maxent模型是有效且必要的。
Due to the decreased habitat quality, the population size of Scutiger has declined dramatically in recent years. A clear understanding of the geographic distribution about Scutiger is the basis for monitoring, management, and conservation of Scutiger. The Hengduan Mountains region may be the origin and differentiation center of Scutiger. However, the geographical distribution pattern of Scutiger in the Hengduan Mountains region is still unclear so far. To explore this issue, we used the optimized Maxent model to predict the potential geographical distribution of five high-altitude species of Scutiger in this study, including Scutiger boulengeri, Scutiger mammatus, Scutiger glandulatus, Scutiger tuberculatus, and Scutiger gongshanensis, in the south of Hengduan Mountains Biodiversity Conservation Priority Zone. In addition, we further analyzed the relationship of potential geographical distribution with the environmental variables of five high-altitude species of Scutige. The results showed that the potential geographical distribution patterns of the five species of Scutiger were different in the south of the Hengduan Mountains Biodiversity Conservation Priority Zone. The potential distribution area of Scutiger boulengeri was mainly located in the northern part of the south of the Hengduan Mountains Biodiversity Conservation Priority Zone. Scutiger tuberculatus was mainly distributed among Sichuan Province in the northeast of the south of Hengduan Mountains Biodiversity Conservation Priority Zone. However, Scutiger gongshanensis was mainly distributed in the southwest of the south of Hengduan Mountains Biodiversity Conservation Priority Zone. The potential distribution pattern of Scutiger mammatus and Scutiger glandulatus was similar, mainly distributed in the central and northwest parts of the south of Hengduan Mountains Biodiversity Conservation Priority Zone, while the potential distribution of Scutiger glandulatus was more fragmented. What′s more, the species richness of Scutiger in the northern part of the south of the Hengduan Mountains Biodiversity Conservation Priority Zone is significantly higher than that in the southern part. The relative contributions and jackknife test of environmental variables showed that temperature and precipitation were the main environmental factors, which determine the potential distribution of Scutiger in the south of the Hengduan Mountains Biodiversity Conservation Priority Zone. Precipitation of the coldest quarter had an important effect on the potential distribution of Scutiger boulengeri, Scutiger gongshanensis, and Scutiger tuberculatus, but their preferences for precipitation of the coldest quarter were different. In addition, our study also shows that it is effective and necessary to select the best Maxent model by evaluating the potential model combination of parameters for improving the Maxent model′s predictive power.
作者
赵梓伊
肖能文
刘高慧
李俊生
ZHAO Ziyi;XIAO Nengwen;LIU Gaohui;LI Junsheng(Key Laboratory of National Environmental Protection for Assessment of Region Ecological Processes and Functions,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;School of Life Sciences,Lanzhou University,Lanzhou 730000,China)
出处
《生态学报》
CAS
CSCD
北大核心
2022年第7期2636-2647,共12页
Acta Ecologica Sinica
基金
生态环境部生物多样性调查评估项目(2019HJ2096001006)。
关键词
Maxent模型
潜在地理分布
横断山南
齿突蟾属
Maxent model
potential geographical distribution
the south of Hengduan Mountains Biodiversity Conservation Priority Zone
Scutiger
