摘要
利用国家标本资源共享平台提供的物种分布数据,结合野外实地调查和MaxEnt模型对滇龙胆草适宜分布区进行模拟和验证,分析滇龙胆草地理分布与气候因子间的关系.结果表明:模型训练集和验证集曲线下面积(area under curve,AUC)值均>0.90,表明模型预测精度高,预测结果较准确.滇龙胆草分布区地理坐标范围:22.2°-28.75°N,98.48°-110.59°E.适宜的海拔范围为1830^1959 m.适生区总面积约63.92×10^4 km^2;其中,高度适生区4.33×10^4 km^2,中度适生区21.42×10^4 km^2.云南、四川、贵州3省适生区面积合计约59.10×10^4 km^2,占全国适生区面积的92.46%.影响滇龙胆草地理分布的主要气候因子有3、6和8月太阳辐射,温度年较差,最暖季均温,10月和11月平均降水量及最干季降水量.偏最小二乘回归(partial least squares regression,PLSR)分析表明,分布区以北和以东的太阳辐射(3月、6月和8月)、温度年较差、10-11月平均降水量、最干季降水量是主要的限制因子;分布区以南主要限制因子是6月太阳辐射、最暖季均温、10月和11月平均降水量.限制滇龙胆草向四川盆地、广西盆地分布的主要气候因子是太阳辐射、温度年较差、最暖季均温、年生物温度和年可能蒸散量.综合分析认为,滇龙胆草的适生区主要位于云贵高原,上述地区的亚热带湿润气候最适宜滇龙胆草生长.
Based on the species distribution data provided by the National Specimen Information Infrastructure combined with field survey and MaxEnt model, we simulated and verified the suitable distribution area of Gentiana rigescens. Furthermore, the relationship between the geographical distribution and climatic factors of G. rigescens was analyzed. The results showed that area under curve of training set and test set were more than 0.90, indicating high prediction precision and accurate prediction results. Geographic coordinate range of G. rigescens were 22.2°-28.75° N and 98.48°-110.59° E. The suitable altitude range was from 1830 to 1959 m. The total area of suitable distribution region was 63.92×10^4 km^2, including the most suitable distribution region(4.33×10^4 km^2) and middle suitable distribution region(21.42×10^4 km^2). Total area of suitable distribution region in Yunnan, Guizhou and Sichuan provinces was about 59.10×10^4 km^2, which accounted for 92.46% of total suitable distribution region in China. Solar radiation(March, June and August), temperature annual range, mean temperature of warmest quarter, mean precipitation of October and November, precipitation of driest quarter were the major climatic factors influencing the geographi-cal distribution of G. rigescens. Results from partial least squares regression analysis showed that solar radiation(March, June and August), temperature annual range, mean precipitation of October and November, precipitation of driest quarter were the main restriction factors in north and east of suitable distribution region. The main restriction factors in south of suitable distribution region were solar radiation of June, mean temperature of warmest quarter, precipitation of October and November. The factors limiting distribution of G. rigescens to basin of Sichuan and Guangxi were solar radiation, temperature annual range, mean temperature of warmest quarter, annual biotempe-rature and annual potential evapotranspiration. In conclusion, suitable distribution region of G. rigescens primarily located in the Yunnan-Guizhou Plateau, where subtropical humid climate was most suitable for its growth.
作者
沈涛
虞泓
王元忠
SHEN Tao;YU Hong;WANG Yuan-zhong(Yunnan Herbal Laboratory,Institute of Herb Biotic Resources,School of Life and Sciences,Yunnan University,Kunming 650091,China;International Joint Research Center for Sustainable Utilization of Cordyceps bioresouces in China (Yunnan) and Southeast Asia,Yunnan University,Kunming 650091,China;College of Chemistry,Biological and Environment,Yuxi Normal University,Yuxi 653100,Yunnan,China;Institute of Medicinal Plant,Yunnan Academy of Agricultural Sciences,Kunming 650200,China)
出处
《应用生态学报》
CAS
CSCD
北大核心
2019年第7期2291-2300,共10页
Chinese Journal of Applied Ecology
基金
云南省自然科学基金重点项目(2017FA049)
云南省应用基础研究计划项目(2017FH001-028)资助~~
关键词
滇龙胆草
药用植物资源
地理分布
生物气候特征
生态位模型
Gentiana rigescens
medicinal plant resources
geographical distribution
bioclimatic characteristics
ecological niche model
