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应用生态学报 ›› 2019, Vol. 30 ›› Issue (7): 2291-2300.doi: 10.13287/j.1001-9332.201907.003

• 研究报告 • 上一篇    下一篇

滇龙胆草野生资源的地理分布与生物气候特征

沈涛1,2,3, 虞泓1,2*, 王元忠4   

  1. 1云南大学生命科学学院, 中草药生物资源研究所云百草实验室, 昆明 650091;
    2云南大学中国云南—东南亚虫草生物资源可持续利用国际联合研究中心, 昆明 650091;
    3玉溪师范学院化学生物与环境学院, 云南玉溪 653100;
    4云南省农业科学院药用植物研究所, 昆明 650200
  • 收稿日期:2018-09-18 出版日期:2019-07-15 发布日期:2019-07-15
  • 通讯作者: * E-mail: herbfish@163.com
  • 作者简介:沈涛,男,1984年生,博士研究生.主要从事药用植物资源评价研究.E-mail:st_yxnu@126.com
  • 基金资助:
    云南省自然科学基金重点项目(2017FA049)和云南省应用基础研究计划项目(2017FH001-028)

Geographical distribution and bioclimatic characteristics of the wild Gentiana rigescens resources.

SHEN Tao1,2,3, YU Hong1,2*, WANG Yuan-zhong4   

  1. 1Yunnan Herbal Laboratory, Institute of Herb Biotic Resources, School of Life and Sciences, Yunnan University, Kunming 650091, China;
    2International Joint Research Center for Sustainable Utilization of Cordyceps bioresouces in China Yunnan and Southeast Asia, Yunnan University, Kunming 650091, China;
    3College of Chemistry, Biological and Environment, Yuxi Normal University, Yuxi 653100, Yunnan, China;
    4Institute of Medicinal Plant, Yunnan Academy of Agricultural Sciences, Kunming 650200, China.
  • Received:2018-09-18 Online:2019-07-15 Published:2019-07-15
  • Contact: * E-mail: herbfish@163.com

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63.92×104 km2;其中,高度适生区4.33×104 km2,中度适生区21.42×104 km2.云南、四川、贵州3省适生区面积合计约59.10×104 km2,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.

Abstract: 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 63.92×104 km2, including the most suitable distribution region (4.33×104 km2) and middle suitable distribution region (21.42×104 km2). Total area of suitable distribution region in Yunnan, Guizhou and Sichuan provinces was about 59.10×104 km2, 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.