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Wang Shi-Tong, Li Ling-Li, Xu Yao-Zhan, Gu Zhi-Rong, Wang Ye-Qing, Yu Gui-Qing, Chen Zhen-Fa, Yang Cun-Cun, Zhang E, Wang Yong-Chao, Jiang Ming-Xi. Population structure and dynamic characteristics of extremely small populations of Changiostyrax dolichocarpa C. J. Qi[J]. Plant Science Journal, 2022, 40(5): 627-636. DOI: 10.11913/PSJ.2095-0837.2022.50627
Citation: Wang Shi-Tong, Li Ling-Li, Xu Yao-Zhan, Gu Zhi-Rong, Wang Ye-Qing, Yu Gui-Qing, Chen Zhen-Fa, Yang Cun-Cun, Zhang E, Wang Yong-Chao, Jiang Ming-Xi. Population structure and dynamic characteristics of extremely small populations of Changiostyrax dolichocarpa C. J. Qi[J]. Plant Science Journal, 2022, 40(5): 627-636. DOI: 10.11913/PSJ.2095-0837.2022.50627
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Population structure and dynamic characteristics of extremely small populations of Changiostyrax dolichocarpa C. J. Qi

  • 1. Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China;

  • 2. University of Chinese Academy of Sciences, Beijing 100049, China;

  • 3. Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China;

  • 4. Badagongshan National Nature Reserve, Sangzhi, Hunan 427100, China;

  • 5. Houhe National Nature Reserve, Wufeng, Hubei 443400, China;

  • 6. Hupingshan National Nature Reserve, Shimen, Hunan 415300, China

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This work was supported by grants from the Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment of China (2019HJ2096001006),and National Natural Science Foundation of China (31870510).

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  • Received Date: March 01, 2022
  • Revised Date: March 22, 2022
  • Available Online: December 08, 2022
    Graphical Abstract
    • Abstract
  • We investigated the communities of Changiostyrax dolichocarpa C. J. Qi, a wild plant with extremely small populations distributed in four extant regions of China (Sangzhi, Shimen, Wufeng, and Zigui). We first constructed a population structure map and established a static life table, then plotted survival curves for survival analysis and predicted future development trends of the populations using time series analysis. Results showed that the Sangzhi, Shimen, and Wufeng populations were all increasing, but the Zigui population was declining. However, all four populations were sensitive to external disturbance. The population survival curves tended to be Deevey-Ⅱ type, showing a decrease in the early stage, stabilization in the middle stage, and recession in the late stage. Survival analysis showed that the Sangzhi and Zigui populations entered the declining stage early, mainly due to environmental pressure, while the Shimen and Wufeng populations entered the declining stage relatively late, mainly due to physiological decline. Time series analysis indicated that the number of young individuals in the Sangzhi, Shimen, and Wufeng populations will decrease, while the number of middle-aged and old individuals will increase in the future 2-8 age classes. For the Zigui population, the number of young and middle-aged individuals will gradually decrease, while the number of old individuals will first increase and then decrease. Results suggest that strengthening the protection of the original habitat and research on artificial propagation technology may help promote population growth.
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