| Top Canopy Height and Stem Size Variation Enhance Aboveground Biomass across Spatial Scales in Seasonal Tropical Forests | |
Sun, Zhenhua1; Sonsuthi, Arunkamon2; Jucker, Tommaso3; Ali, Arshad4; Cao, Min ; Liu, Feng5; Cao, Guanghong6; Hu, Tianyu7; Ma, Qin2,7; Guo, Qinghua8; Lin, Luxiang1
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| 2023 | |
| Source Publication | PLANTS-BASEL
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| ISSN | 2223-7747 |
| Volume | 12Issue:6Pages:- |
| Abstract | Tropical forests are biologically diverse and structurally complex ecosystems that can store a large quantity of carbon and support a great variety of plant and animal species. However, tropical forest structure can vary dramatically within seemingly homogeneous landscapes due to subtle changes in topography, soil fertility, species composition and past disturbances. Although numerous studies have reported the effects of field-based stand structure attributes on aboveground biomass (AGB) in tropical forests, the relative effects and contributions of UAV LiDAR-based canopy structure and ground-based stand structural attributes in shaping AGB remain unclear. Here, we hypothesize that mean top-of-canopy height (TCH) enhances AGB directly and indirectly via species richness and horizontal stand structural attributes, but these positive relationships are stronger at a larger spatial scale. We used a combined approach of field inventory and LiDAR-based remote sensing to explore how stand structural attributes (stem abundance, size variation and TCH) and tree species richness affect AGB along an elevational gradient in tropical forests at two spatial scales, i.e., 20 m x 20 m (small scale), and 50 m x 50 m (large scale) in southwest China. Specifically, we used structural equation models to test the proposed hypothesis. We found that TCH, stem size variation and abundance were strongly positively associated with AGB at both spatial scales, in addition to which increasing TCH led to greater AGB indirectly through increased stem size variation. Species richness had negative to negligible influences on AGB, but species richness increased with increasing stem abundance at both spatial scales. Our results suggest that light capture and use, modulated by stand structure, are key to promoting high AGB stocks in tropical forests. Thus, we argue that both horizontal and vertical stand structures are important for shaping AGB, but the relative contributions vary across spatial scales in tropical forests. Importantly, our results highlight the importance of including vertical forest stand attributes for predicting AGB and carbon sequestration that underpins human wellbeing. |
| Keyword | aboveground biomass (AGB) stand structural attributes UAV LiDAR-based canopy structure mean top of canopy height (TCH) tropical forest |
| Subject Area | Plant Sciences |
| DOI | 10.3390/plants12061343 |
| Indexed By | SCI |
| WOS ID | WOS:000958918200001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/13374 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.Chinese Acad Sci, CAS Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Peoples R China 2.Chinese Acad Sci, Ctr Plant Ecol, Core Bot Gardens, Mengla 666303, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ Bristol, Sch Biol Sci, Bristol BS8 1QU, England 5.Hebei Univ, Coll Life Sci, Forest Ecol Res Grp, Baoding 071002, Peoples R China 6.Yunnan Acad Forestry & Grassland, Kunming 650201, Peoples R China 7.Adm Bur Naban River Watershed Natl Nat Reserve, Jinghong 666100, Peoples R China 8.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 9.Peking Univ, Inst Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China |
| Recommended Citation GB/T 7714 | Sun, Zhenhua,Sonsuthi, Arunkamon,Jucker, Tommaso,et al. Top Canopy Height and Stem Size Variation Enhance Aboveground Biomass across Spatial Scales in Seasonal Tropical Forests[J]. PLANTS-BASEL,2023,12(6):-. |
| APA | Sun, Zhenhua.,Sonsuthi, Arunkamon.,Jucker, Tommaso.,Ali, Arshad.,Cao, Min.,...&Lin, Luxiang.(2023).Top Canopy Height and Stem Size Variation Enhance Aboveground Biomass across Spatial Scales in Seasonal Tropical Forests.PLANTS-BASEL,12(6),-. |
| MLA | Sun, Zhenhua,et al."Top Canopy Height and Stem Size Variation Enhance Aboveground Biomass across Spatial Scales in Seasonal Tropical Forests".PLANTS-BASEL 12.6(2023):-. |
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| Top Canopy Height an（2056KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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