基于优化的MaxEnt模型预测龙胆科重要药用植物在青藏高原的生境适宜性研究

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doi：10.11733/j.issn.1007-0435.2025.09.026

关键词：气候变化；青藏高原；龙胆科；药用植物；分布区中图分类号：Q948.13 文献标识码：A 文章编号：1007-0435（2025）09-3024-10

Evaluation of Habitat Suitability of Important Medicinal Plants Gentianaceae in the Qinghai-Tibet Plateau Based on the Optimized Maximum Entropy Model

DOU Quan-hui1’²， CHEN Cheng-hao1， ZENGTAI Yi-hei³，LONGZHU Duo-jie¹，MIAO Qi1 SUN Fang-hui1，CAIRANG La-mao¹， CHEN Xi1， SUONAN Ji1，4* （204号

（1.CollegeofifeeQialUstKeybotorfvesitatichsmdpresiU oftheQinghabetateQigaiProvceingQihriceohi；.ColstoalAgriculturee nologyaia; 4.People'sGovementofQinghaiProvice&BeijingoalUversitycadeyoflateaSienceandustaiabityingingi Province 810000，China）

Abstract： This study predicted the potential suitable habitats of medicinal plant Gentianaceae in the QinghaiTibet Plateau using the optimized MaxEnt model（parameter setings： regularization multiplier1.6，feature combinationsLQPT，AUC ：=0.84 ）based on 746 distribution records and 15 environmental variables，and identified key environmental drivers. The results showed：（1） Six critical factors，including annual precipitation （biol2）， elevation（bio2O），annual average temperature （biol），minimum temperature of coldest month （bio6），mean temperature in the coldest quarter（biol1），and warmest quarter precipitation（biol8），cumulatively contributed 89.2% ，among which precipitation dominated distribution paterns.（2） Current high-suitability areas （38. 62× 104km2） were in the eastern and southeastern Qinghai-Tibet Plateau， totaling 128. 59×104km2 of suitable habitats.（3）Under future climate scenarios （SSPl26/SSP585，2O4Os-21OOs），suitable habitats exhibited expansion toward higher elevation，withdistribution centroid shifting northwestward and potential distribution belts extendingto western high-altitude regions.Projections revealed the Sichuan-Tibet Alpine Valeys and Hengduan Mountains was core expansion zones.However，intensive human activities and insuficient protection coverage in these regions. It recommended prioritizing the establishment of germplasm resource banks for Gentianaceae medicinal plants to reconcile resource utilization and ecological conservation in expansion hotspots.

Key words：Climate change;Qinghai-Tibet Plateau;Gentianaceae;Medicinal plant;Distribution area

气候变化作为当今人类面临的最为严峻的挑战之一，对全球范围内大多数生态系统的结构功能和物种分布格局变迁产生了重要影响。（剩余14772字）