基于MaxEnt模型的甘孜州高原鼠兔种群空间分布及防控对策OA

[Objective]This study aimed to clarify the spatial distribution of plateau pika(Ochotona cur-zoniae)in Ganzi Tibetan Autonomous Prefecture,Sichuan Province,and identify the key environmental factors driving its distribution,so as to provide a scientific basis for regional grassland ecological conser-vation and rodent pest management.[Method]A total of 1,197 valid occurrence records of plateau pika were obtained via field surveys.Combined with climatic and topographic variables,the MaxEnt model was used to predict the potential suitable distribution areas of plateau pika in the study region.[Result]The MaxEnt model achieved high prediction accuracy,with an AUC value of 0.925.Annual temperature range was identified as the dominant environmental factors affecting the distribution of plateau pika in Ganzi Prefecture,with a percent contribution of 68.1%.The total suitable habitat area accounted for 20.9%of the total land area of the prefecture,among which highly,moderately,and lowly suitable habi-tats covered 5.63×105 hm2,8.93×105 hm2 and 1.45×106 hm2,respectively.The plateau pika exhibited an aggregated spatial distribution,and an obvious"suitability without occurrence"pattern was detected between the predicted suitable habitats and actual infestation areas.[Conclusion]Accordingly,future rodent control should prioritize degraded grasslands within highly and moderately suitable habitats,estab-lish a hierarchical monitoring and early-warning system,and carry out precise prevention and control measures.