Chin J Plant Ecol ›› 2022, Vol. 46 ›› Issue (7): 785-796.DOI: 10.17521/cjpe.2021.0108

• Research Articles • Previous Articles     Next Articles

Potential distribution of Impatiens davidii and its pollinator in China

SU Qi-Tao1, DU Zhi-Xuan1,2, ZHOU Bing1, LIAO Yong-Hui1, WANG Cheng-Cheng1, XIAO Yi-An1,*()   

  1. 1School of Life Sciences, Jinggangshan University, Ji'an, Jiangxi 343009, China
    2School of Agriculture Sciences, Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2021-03-25 Accepted:2021-06-24 Online:2022-07-20 Published:2022-06-09
  • Contact: XIAO Yi-An
  • Supported by:
    National Natural Science Foundation of China(41561012);Science and Technology Project of Education Department of Jiangxi Province(GJJ201038);Science and Technology Project of Education Department of Jiangxi Province(GJJ190574);Natural Science Foundation of Jiangxi Province(20192BAB214018)


Aims Impatiens davidii, a rare ornamental flower endemic to China, had a small wild population and depended on pollination of Bombus trifasciatus. As I. davidii has a specialized pollination system, pollination resources were one of the important factors limiting its population diffusion.

Methods In this study, the maximum entropy (MaxEnt) model was used to simulate the potential distribution area of the two species based on 63 distribution records of I. davidii, 54 distribution records of B. trifasciatus, and 19 climatic factors. The potential distribution of the two species under three climate representative concentration pathway scenarios RCP2.6, RCP4.5, and RCP8.5 were predicted for the future (2050s, 2070s).

Important findings The results showed that the main environmental factor affecting the distribution of I. davidii was precipitation of warmest quarter. Under the current climate conditions, the range overlap, niche overlap, and niche breadth of two species were higher. Approximately 99.09% of the suitable areas of I. davidiiwas overlapped with B. trifasciatus, which ensured the pollination resources to a large extent. Under the three future climate scenarios, the distribution area of I. davidii will expand to northeast and north China, and the suitable habitat area will increase by 66 000-221 900 km2. The suitable habitat area of B. trifasciatus moved northward slightly, and increased by 44 800-155 000 km2. The proportion of suitable habitat areas of I. davidii overlapped with B. trifasciatus decreased by 1.40%-9.00%, indicating that the suitable area of I. davidii might be affected by climate change and lack of pollination resources in the future.

Key words: Impatiens davidii, Bombus trifasciatus, climate change, MaxEnt model, pollination