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Acta Prataculturae Sinica ›› 2024, Vol. 33 ›› Issue (10): 14-27.DOI: 10.11686/cyxb2023435

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Prediction of the potential distribution of Curcuma in China under current and future climate scenarios

Peng WANG1(), Zheng JIN1, Ting YU1, Kang-qiang QIN1, Xin-ya SANG1, Jian-ping TAO1,2, Wei-xue LUO1,2()   

  1. 1.Key Laboratory of Eco-Environment in Three Gorges Reservoir Region,Ministry of Education,Chongqing Key Laboratory of Plant Ecology and Resources in Three Gorges Reservoir Region,School of Life Sciences,Southwest University,Chongqing 400715,China
    2.Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station,School of Geographical Sciences,Southwest University,Chongqing 400715,China
  • Received:2023-11-16 Revised:2024-01-31 Online:2024-10-20 Published:2024-07-15
  • Contact: Wei-xue LUO

Abstract:

Curcuma species are important medicinal herbs in China, and are crucial for the sustainable development of Chinese herbal medicine resources. However, the potential distribution pattern of Cucurma species in China under climate change is still unclear. To study the potential spatial distribution characteristics of Curcuma species under climate change in China, we selected the three most representative species, namely Curcuma phaeocaulisCurcuma longa, and Curcuma aromatica, for detailed analyses. The MaxEnt model (maximum entropy) and geographic information system (ArcGIS) methods were applied, and along with records of the present distribution of these three Curcuma species and environmental factors in their distribution area such as climate, topography, and soil, were used predict the potential habitat of the three species under current and future climate scenarios. The results showed that the area under receiver operating characteristic curve (AUC) values of the three Curcuma species predicted by the MaxEnt model were all greater than 0.95, indicating that the prediction results had high accuracy. At present, the three species are mainly distributed in the provinces of Yunnan, Guangxi, Guangdong, Fujian, Taiwan, and Hainan, with C. longa having the largest area of suitable habitat and C. aromatica having the smallest. During the 2090s, under the SSP245 climate scenario, there is a trend for all three species to expand their distribution towards the northeast in China with the maximum area of suitable habitat. Under the SSP370 and SSP585 climate scenarios, only small areas of the three species will undergo contraction and expansion of the fitness zone. The mean temperature of the driest season was identified as the key factor affecting the potential distribution of C. phaeocaulis, while the mean annual precipitation was identified as the key factor affecting the potential distribution of C. longa and C. aromatica. In conclusion, the three species of Curcuma are mainly distributed in southern China and will tend to expand northward under climate change. On the basis of these results, the Conservation Departments in some identified provinces can carry out planting to expand the growing area of Curcuma, which will help to enhance the economic and ecological benefits of this genus.

Key words: Curcuma plants, MaxEnt model, environmental factors, climate change, potential distribution