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基于MaxEnt和ArcGIS对太白米的潜在分布预测及适宜性评价

车乐,曹博,白成科**,王娟娟,张琳琳   

  1. (陕西师范大学生命科学学院, 西安 710062)
  • 出版日期:2014-06-10 发布日期:2014-06-10

Predictive distribution and habitat suitability assessment of Notholirion bulbuliferum based on MaxEnt and ArcGIS.

CHE Le, CAO Bo, BAI Cheng-ke**, WANG Juan-juan, ZHANG Lin-lin   

  1. (College of Life Sciences, Shaanxi Normal University, Xi’an 710062, China)
  • Online:2014-06-10 Published:2014-06-10

摘要:

利用最大熵生态位模型(MaxEnt)与地理信息系统(ArcGIS),结合89个太白米地理分布数据、28个气候因子以及6个与太白米生长相关的土壤因子,对太白米在我国的潜在分布和适宜等级进行了预测。结果表明:太白米的最适生区(适宜系数>0.5)主要集中分布在四川(阿坝、甘孜和凉山,51813 km2)、云南(迪庆和丽江,15889 km2)、陕西(太白,16131 km2)、西藏(林芝、山南和日喀则,17748 km2)和甘肃(陇南,12184 km2)等地区。ROC曲线的AUC=0.979,表明预测结果可信度高。影响太白米分布的主要环境因素有年均降水量(贡献率38%)、海拔(32.1%)、1月最低温(7.6%)、1月降水量(6.8%)、土壤pH值(3.9%)等,太白米最适宜区环境参数为:年均降水量870 mm,海拔2550 m,1月最低温-6.3 ℃,1月降水量5.3 mm,土壤pH=6.77。
 

关键词: 高羊茅, 生物量, 抗氧化剂, 亚细胞结构

Abstract: In this study, 89 occurrence records, 28 climatic and 6 soil factors were used to predict the potential distribution and habitat suitability of Notholirion bulbuliferum in China based on the MaxEnt modeling and geographic information system. The results showed that the highly potential distribution (suitability index >0.5) mainly located in Sichuan (Aba, Ganzi and Liangshan, with an area of 51813 km2), Yunnan (Diqing and Lijiang, 15889 km2), Shaanxi (Taibai, 16131 km2), Tibet (Nyingchi, Lhoka and Shigatse, 17748 km2) and Gansu (Longnan, 12184 km2) provinces. The AUC of ROC curve was 0.979, indicating that the predictive results with the MaxEnt model were highly precise. The main environmental factors determining the potential distribution were annual average precipitation (the contribution rate, 38%), altitude (32.1%), average monthly minimum temperature of January (7.6%), average monthly precipitation of January (6.8%) and topsoil pH (H2O) (3.9%). The environmental variables in the highly potential areas were determined as annual average precipitation around 870 mm, altitude around 2550 m, average monthly minimum temperature of January around -6.3 ℃, average monthly precipitation of January around 5.3 mm and topsoil pH (H2O) around 6.77. The results will provide valuable references for wild resource conservation, plantation regionalization and standard cultivation of N. bulbuliferum in highly suitable areas.

Key words: Festuca arundinace, subcellular structure, antioxidant, biomass