五种齿突蟾在横断山南潜在地理分布预测

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五种齿突蟾在横断山南潜在地理分布预测

2024-07-16 06:59| 来源: 网络整理| 查看: 265

Abstract:

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.



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