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Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (3): 101-109.DOI: 10.7522/j.issn.1000-694X.2021.00028

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Potential distribution of Hippophae thibetana and its predicted responses to climate change

Xiaohui He1,2,3(), Jianhua Si1(), Chunyan Zhao1, Chunlin Wang1,3, Dongmeng Zhou1,3   

  1. 1.Key Laboratory of Eco-Hydrology of Inland River Basin,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.College of Resources and Environment,Baotou Teachers’ College,Baotou 014030,Inner Mongolia,China
    3.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2021-01-21 Revised:2021-03-16 Online:2021-05-26 Published:2021-05-26
  • Contact: Jianhua Si

Abstract:

Climate change affects the geographical distribution of species. Studying the geographical distribution of species under different climate scenarios is helpful to the species conservation and rational utilization of plant resources. In order to accurately understand the suitable habitat of Hippophae thibetana in China, based on 118 records of species occurrence data, 19 climate and 3 terrain factors, with the MaxEnt model and ArcGIS software, this research simulated the suitable habitat of H.thibetana under current climate conditions, explored the dominant factors affecting its growth and their thresholds, and examined future distribution under different climate change scenarios(i.e., RCP2.6, RCP4.5, RCP6.0 and RCP8.5) in 2040-2060 and 2060-2080, respectively. The results show that: (1) Under current climate conditions, the area of high suitable habitat is 33.32×104 km2 and the area of suitable habitatis 51.65×104 km2.They are mainly located in Himalayas and Qilian Mountains of the Tibetan Plateau, concentrated in Tibet, Gansu, Qinghai, Sichuan provinces. (2) The most significant factors affecting the distribution of H.thibetana areelevation, precipitation of the driest quarter, mean temperature of coldest quarter. The suitable elevation is 2 500-4 800 m. The suitable precipitation of the driest season ranges from 200 mm to 420 mm. The suitable mean temperature of coldest season ranges from -12 ℃ to 0 ℃. (3) Under different climate change scenarios in the future, the area of unsuitable habitat would significantly increase, while the others would reduce. This results may be useful for the protection, development and plantation of H.thibetana.

Key words: Hippophae thibetana, climate change, MaxEnt model, suitable habitat

CLC Number: