Study on population structure and seedling regeneration of Hopea hainanensis Merr. &amp; Chun under ex situ conservation in Xishuangbanna Tropical Botanical Garden

Xiao Yun-Xue; Yin Lin-Hao; Yu Wen-Bin; Tang Jian-Wei

doi:10.11913/PSJ.2095-0837.22294

Plant Science Journal > 2023 > 41(5): 604-612. > DOI: 10.11913/PSJ.2095-0837.22294 CSTR: 32231.14.PSJ.2095-0837.22294

Xiao YX，Yin LH，Yu WB，Tang JW. Study on population structure and seedling regeneration of Hopea hainanensis Merr. & Chun under ex situ conservation in Xishuangbanna Tropical Botanical Garden[J]. Plant Science Journal，2023，41（5）：604−612. DOI: 10.11913/PSJ.2095-0837.22294

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Study on population structure and seedling regeneration of Hopea hainanensis Merr. & Chun under ex situ conservation in Xishuangbanna Tropical Botanical Garden

1.
Horticulture Department of Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China
2.
School of Coffee for Pu’er University, Pu’er, Yunnan 665000, China
3.
Center for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China
4.
CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Xishuangbanna, Yunnan 666303, China

Funds: This work was supported by grants from the Ministry of Ecology and Environment, China: Investigation and Evaluation of Biodiversity (2019HJ2096001006) and Strategic Biological Resources Project of the Chinese Academy of Sciences (KFJ-BRP-007-005).

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Received Date: November 21, 2022
Revised Date: December 15, 2022
Available Online: November 06, 2023

Graphical Abstract

Abstract

Abstract

An investigation of a Hopea hainanensis population was conducted in a 500 m² plot in the Xishuangbanna Tropical Botanical Garden (XTBG), Chinese Academy of Sciences. The diameter-level structure was used instead of the age-level structure to analyze the structural characteristics of the population. At the same time, a static life table was compiled to analyze the survival rate, mortality rate, and disappearance rate of the population. Results showed that the ex situ cultivated H. hainanensis population had no individuals with large diameter, although most of adult individuals are capable of blossoming, fruiting, and naturally regenerating. The seedling density of H. hainanensis was 19 550 plants per hm², accounting for 86.00% of total individuals. Based on the static life table, the lowest mortality rate was observed in age class Ⅱ, while the highest was observed in age class Ⅲ. The population survival curve was categorized as the Deevey-Ⅲ type. Changes in mortality and loss rate curves showed the same trend. Results indicated that ex situ conservation of H. hainanensis in XTBG has achieved initial success, as evidenced by its population increase and germination stability. Enhanced management of seedlings and saplings could further improve survival rates and promote seedling to sapling, treelet, and tree progression, thereby expanding its population.
- Hopea hainanensis,
- Population structure,
- Seedling regeneration,
- Seedling renewal,
- Static life table,
- Survival curve

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References

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Study on population structure and seedling regeneration of Hopea hainanensis Merr. & Chun under ex situ conservation in Xishuangbanna Tropical Botanical Garden