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Climate-Driven Range Shift of the Medicinal Herb Epimedium sagittatum: An Optimized MaxEnt Projection for China
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DOI：10.3390/biology15141103.png)
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Abstract
En 中文
Epimedium sagittatum, a Chinese medicinal herb traditionally used for bone and kidney health, faces rapid wild population decline due to overharvesting, habitat fragmentation, and climate change. Using 269 verified field records and an advanced ecological model, we projected its future distribution under multiple climate scenarios. Two key constraints emerged: dry-season rainfall and winter cold extremes. Under the highest-emission pathway, suitable habitats were forecast to contract and shift southwestward by over 127 km by the 2090s, with severe losses in Southern China. In response, we recommend (1) protecting climatically stable hill regions in Jiangxi, Zhejiang, and Hunan; (2) developing climate-adapted cultivation in montane Sichuan, Chongqing, and southern Shaanxi; and (3) systematically banking seeds from vulnerable southern populations to preserve genetic diversity. This integrated strategy provides a practical roadmap for sustaining E. sagittatum as environmental conditions continue to change.
Keywords:
<i>Epimedium sagittatum</i>
climate change
MaxEnt model
parameter optimization
conservation planning
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