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基于MaxEnt模型对文山市豹猫适宜性分析

Analysis on leopard cat habitat suitability based on MaxEnt model in Wenshan city

  • 摘要: 利用MaxEnt模型对文山市地区的豹猫(Prionailurus bengalensis)适宜性分布进行预测和分析。通过查阅文献综述和监测样线实地调查,2022年11月在文山市范围内布设118台红外相机,2023年6月收集和筛选研究区域的12个环境变量和55个文山市豹猫分布数据。采用MaxEnt模型(maximum entropy modeling)对数据进行处理和分析,对豹猫在文山市潜在栖息地适宜性进行综合评价,结果生成栖息地适宜度指数(habitat suitability index,HSI)阈值划定研究区域,显示非适生区面积为2 684.66 km2,低适生区面积为155.64 km2,中适生区面积为78.70 km2,高适生区面积为58.84 km2,并生成物种适宜性分布图。气温年较差、植被类型、最热月最高温度、年降水量和最干季降水量的综合贡献值分别为38%、17.8%、17.8%、8.2%、7.6%,这5个环境变量是影响豹猫分布的主导环境因素。结果显示研究区域内存在局部高适宜性区域,这些区域的环境条件对豹猫的生存和繁殖具有重要影响。通过对适宜性区域的分布进行空间分析,可以为豹猫的保护和管理提供科学依据,建议在文山市规划自然生态保护地区域适当扩展,以便其种群保持稳定。

     

    Abstract: Using MaxEnt model, the potential distribution of Prionailurus bengalensis in Wenshan city was predicted and analyzed. By reviewing the literature review and conducting field surveys along monitoring transects, 118 infrared cameras were deployed within the Wenshan city area in November 2022, and 55 distribution data of Wenshan city Prionailurus bengalensis were collected and screened from 12 environmental variables in the study area in June 2023. The data were processed and analyzed using MaxEnt model to provide a comprehensive evaluation of the potential habitat suitability for leopard cats in Wenshan city. The results generated a habitat suitability index (HSI) threshold to delineate the study area, showing that the non-suitable area was 2 684.66 km2, the lowsuitable area was 155.64 km2, the moderate-suitable area was 78.70 km2, and the high-suitable area was 58.84 km2, and generated a species suitability distribution map. The combined contribution values of the five environmental variables that were the dominant environmental factors affecting leopard cat distribution were 38%, 17.8%, 17.8%, 8.2% and 7.6% respectively: annual temperature difference, vegetation type, hottest month maximum temperature, annual precipitation, and driest season precipitation. The results show that there are local areas of high suitability in the study area, and these areas' environmental conditions are of great importance for the survival and reproduction of Prionailurus bengalensis. By conducting spatial analysis of the suitability areas, it can provide scientific basis for the protection and management of leopard cats, and it is suggested that the natural ecological protection areas in Wenshan city should be appropriately expanded to ensure the stability of the population.

     

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