不同基原的中药川贝母生境适宜性分布

Distribution of habitat suitability for different sources of Fritillariae Cirrhosae Bulbus

利用最大熵模型与GIS技术,结合生态环境数据和中药川贝母4个基原(川贝母、甘肃贝母、梭砂贝母和暗紫贝母)的实际地理分布信息,预测不同基原中药川贝母的生境适宜性空间分布并进行等级划分。结果表明:海拔是影响不同基原中药川贝母生境适宜性最重要的生态因子,海拔对川贝母、甘肃贝母、梭砂贝母和暗紫贝母生境适宜性的贡献率分别达到了38.8%、44.9%、51.1%和52.6%,川贝母的适宜生境主要分布在海拔1850~4550 m的地区,而其他3个基原的中药川贝母大都适宜生长在海拔2800 m以上的高山地区;中药川贝母最适宜生境集中分布在四川、西藏、甘肃、青海和云南5省,但不同基原在各省的分布面积和空间格局存在差异,在引种驯化和人工种植时需要对不同基原进行区分。

Using Maxent model and GIS technology, in combination with ecological environment data and actual geographical distribution of four different sources of Fritillariae Cirrhosae Bulbus, the spatial distribution of suitable habitats for different types of Fritillariae Cirrhosae Bulbus was predicted and the grade of habitat suitability was classified. The results showed that altitude was the most important ecological factor driving the habitat suitability of Fritillariae Cirrhosae Bulbus with different sources. The contribution rates of altitude to the habitat suitability of Fritillaria cirrhosaD. Don, Fritillaria przezvalskiiMaxim.,Fritillaria delavayiFranch., andFritillaria unibracteata Hsiao were 38.8%, 44.9%, 51.1%, and 52.6%, respectively. The suitable habitats for Fritillaria cirrhosa D. Don mainly distributed in areas with an altitude of 1850-4550 m, and the suitable habitats for the other three types were in the alpine areas with an altitude of over 2800 m. The most suitable habitats for different sources of Fritillariae Cirrhosae Bulbus were concentrated in Sichuan, Tibet, Gansu, Qinghai, and Yunnan provinces. However, the distribution area and spatial pattern in each province were different. It is necessary to distinguish different sources of Fritillariae Cirrhosae Bulbus when they are introduced, domesticated, and artificially planted.