Effects of woody plant diversity on aboveground biomass and its scale dependence in tropical natural forest in Hainan Island of southern China

Yao Jie; Ding Yi; Zhou Chaofan; Tian Lixin; Zang Runguo

doi:10.12171/j.1000-1522.20240237

Journal of Beijing Forestry University > 2024 > 46(12): 1-10. > DOI: 10.12171/j.1000-1522.20240237

Yao Jie, Ding Yi, Zhou Chaofan, Tian Lixin, Zang Runguo. Effects of woody plant diversity on aboveground biomass and its scale dependence in tropical natural forest in Hainan Island of southern China[J]. Journal of Beijing Forestry University, 2024, 46(12): 1-10. DOI: 10.12171/j.1000-1522.20240237

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Effects of woody plant diversity on aboveground biomass and its scale dependence in tropical natural forest in Hainan Island of southern China

Yao Jie^{1, 2, 3,},
Ding Yi^{1, 2, 3},
Zhou Chaofan^{1, 2, 4},
Tian Lixin^{1, 2, 5},
Zang Runguo^{1, 2, 3, ,}

1.
Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, China
2.
Bawangling National Observation and Research Station of Chinese Forest Ecosystem, Changjiang 272722, Hainan, China
3.
Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
4.
State Key Laboratory of Efficient Production of Forest Resources, Key Laboratory of Forest Management and Growth Modelling, National Forestry and Grassland Administration, Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
5.
Jiangxi Forestry Resources Monitoring Center, Nanchang 330000, Jiangxi, China

More Information

Received Date: July 29, 2024
Revised Date: August 16, 2024
Accepted Date: August 29, 2024
Available Online: August 30, 2024

Graphical Abstract

Abstract

Abstract

Objective
This study aimed to elucidate the effects of woody plant diversity (in terms of α-diversity and β-diversity) on aboveground biomass in tropical natural forests of Hainan Island of southern China, and to investigate the corresponding scale dependence, in order to enrich the theoretical framework of biodiversity and ecosystem function relationships.
Method
Based on 30 1-ha forest dynamic sample plots established in the tropical natural forests of Hainan Island, this study utilized data from vegetation surveys, tree spatial distribution, and environmental factor measurements. By employing a spatial multi-scale design and multiple linear regression models, we explored the relationship between woody plant diversity, environmental heterogeneity, and aboveground biomass in tropical natural forests, as well as their variation across different spatial scales.
Result
(1) The mean values of α-diversity and β-diversity in the 30 1-ha sample plots were (10.85 ± 3.63) and (0.30 ± 0.16), respectively. α-diversity did not show significant variation across different spatial scales. While β-diversity exhibited an increasing trend with spatial scales. (2) The effects of α-diversity and β-diversity on aboveground biomass were all significantly positive, and the strength of diversity effects showed a consistent trend with spatial scale. (3) The impact of woody plant diversity on aboveground biomass increased with spatial scale initially (from smaller scales of 400 to 3 600 m²), then it tended to flatten out(at intermediate scales of 3 600 to 6 400 m²), and finally decreased (at larger scales of 6 400 to 10 000 m²). (4) The positive effects of α-diversity on aboveground biomass were significantly stronger than that of β-diversity. (5) Environmental factors had positive effects on aboveground biomass, and the strength of these effects increased with the spatial scale.
Conclusion
This study confirms a significant scale dependency in the relationship between biodiversity and ecosystem function, indicating that the main mechanism influencing the biodiversity and ecosystem functioning (BEF) relationship may vary across different spatial scales. Research limited to a single spatial scale or at a local small scale is insufficient for a comprehensive understanding of the mechanism affecting the BEF relationship. Although β-diversity has a lower explanatory power for variations in aboveground biomass compared with α-diversity, this empirical study highlights the important role of β-diversity in promoting ecosystem functions. This provides new insights and analytical perspectives for further exploration of relationship between biodiversity and ecosystem function across spatial scales. Future research should thoroughly consider the relationship between β-diversity and multiple ecosystem functions (i.e., ecosystem multifunctionality), as well as the mechanism by which β-diversity affects ecosystem multifunctionality at different spatial scales (such as local, regional, and landscape scales).
- biodiversity and ecosystem functioning,
- β-diversity,
- scale dependency,
- woody plant diversity,
- biomass,
- tropical natural forest

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References (34)

References

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Effects of woody plant diversity on aboveground biomass and its scale dependence in tropical natural forest in Hainan Island of southern China