Growing-Season Precipitation Is a Key Driver of Plant Leaf Area to Sapwood Area Ratio at the Global Scale.

Autor: He P; Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China., Ye Q; Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.; College of Life Sciences, Gannan Normal University, Ganzhou, China., Yu K; Princeton Environmental Institute, Princeton University, Princeton, New Jersey, USA., Wang H; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China., Xu H; Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China.; Department of Geography, University of Exeter, Exeter, UK., Yin Q; Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi'an, China., Yue M; Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Xi'an, China., Liang X; Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China., Wang W; Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China., You Z; Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China., Zhong Y; College of Life and Environmental Sciences, Minzu University of China, Beijing, China., Liu H; Guangdong Provincial Key Laboratory of Applied Botany, Key Laboratory of National Forestry and Grassland Administration on Plant Conservation and Utilization in Southern China, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China.
Jazyk: angličtina
Zdroj: Plant, cell & environment [Plant Cell Environ] 2024 Sep 27. Date of Electronic Publication: 2024 Sep 27.
DOI: 10.1111/pce.15169
Abstrakt: Leaf area to sapwood area ratio (A L /A S ) influences carbon sequestration, community composition, and ecosystem functioning in terrestrial vegetation and is closely related to leaf economics and hydraulics. However, critical predictors of A L /A S are not well understood. We compiled an A L /A S data set with 1612 species-site combinations (1137 species from 285 sites worldwide) from our field experiments and published literature. We found the global mean A L /A S to be 0.63 m 2  cm -2 , with its variation largely driven by growing-season precipitation (P gs ), which accounted for 18% of the variation in A L /A S . Species in tropical rainforests exhibited the highest A L /A S (0.82 m 2  cm -2 ), whereas desert species showed the lowest A L /A S (0.16 m 2  cm -2 ). Soil factors such as soil nitrogen and soil organic carbon exhibited positive effects on A L /A S , whereas soil pH was negatively correlated with A L /A S . Tree density accounted for 7% of the variation in A L /A S . All biotic and abiotic predictors collectively explained up to 45% of the variation in A L /A S . Additionally, A L /A S was positively correlated to the net primary productivity (NPP) of the ecosystem. Our study provides insights into the driving factors of A L /A S at the global scale and highlights the importance of A L /A S in ecosystem productivity. Given that P gs is the most critical driver of A L /A S , alterations in global precipitation belts, particularly seasonal precipitation, may induce changes in plant leaf area on the branches.
(© 2024 John Wiley & Sons Ltd.)
Databáze: MEDLINE
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