JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (2): 221-226.doi: 10.12302/j.issn.1000-2006.202012011

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Potential distributions of Picea crassifolia on the north slope of Qilian Mountains

TU Zhenyu(), GOU Xiaohua, ZOU Songbing()   

  1. Key Laboratory of Western China’s Environment Systems (Ministry of Education), College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China
  • Received:2020-12-05 Accepted:2021-02-22 Online:2022-03-30 Published:2022-04-08
  • Contact: ZOU Songbing E-mail:tuzhy20@lzu.edu.cn;zousb@lzu.edu.cn

Abstract:

【Objective】Determining the distribution potential of Picea crassifolia in a suitable environment can provide an important basis for a regional ecological restoration and potential assessment. 【Method】Based on the species distribution data and related environmental data in the study area, a species distribution model based on the ecological niche was used to simulate the potential distribution of P. crassifolia with high spatial accuracy, and the key factors affecting its distribution characteristics were analyzed. 【Result】The results showed that the area under curve (AUC) values of the receiver operating characteristic (ROC) curves of the MaxEnt, Bioclim, Domain, and ecology niche factor analysis (ENFA) models were 0.977, 0.936, 0.959, and 0.904, respectively, which had high diagnostic values. Combined with the actual distribution of species and AUC values, the MaxEnt model had the best simulation effect. 【Conclusion】Using spatial analysis, the quantitative relationship between various environmental factors and P. crassifolia was summarized, and the boundary of environmental factors in the distribution area of P. crassifolia on the northern slope of the Qilian Mountains was defined using the standard deviation ellipse method, which provides a support for the regional ecological construction and has an important scientific and practical value.

Key words: Picea crassifolia, potential distribution, ecological niche, MaxEnt model, Qilian Mountains

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