J Integr Plant Biol. ›› 2023, Vol. 65 ›› Issue (10): 2292-2303.DOI: 10.1111/jipb.13545

• Global Change Biology • Previous Articles     Next Articles

Climate factors affect forest biomass allocation by altering soil nutrient availability and leaf traits

Hede Gong1†, Wenchen Song2†, Jiangfeng Wang3†, Xianxian Wang3†, Yuhui Ji3, Xinyu Zhang4 and Jie Gao3,5*   

  1. 1. School of Geography and Ecotourism, Southwest Forestry University, Kunming 650224, China;
    2. College of Life Sciences, Minzu University of China, Beijing 100081, China;
    3. College of Life Sciences, Xinjiang Normal University, Urumqi 830054, China;
    4. College of Biological Sciences, University of California Davis, Davis 95616, California, USA;
    5. Key Laboratory of Earth Surface Processes of Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing 100091, China
    These authors contributed equally to this work.
    *Correspondence: Jie Gao (jiegao@pku.edu.cn)
  • Received:2023-02-07 Accepted:2023-07-19 Online:2023-07-20 Published:2023-10-01

Abstract: Biomass in forests sequesters substantial amounts of carbon; although the contribution of aboveground biomass has been extensively studied, the contribution of belowground biomass remains understudied. Investigating the forest biomass allocation is crucial for understanding the impacts of global change on carbon allocation and cycling. Moreover, the question of how climate factors affect biomass allocation in natural and planted forests remains unresolved. Here, we addressed this question by collecting data from 384 planted forests and 541 natural forests in China. We evaluated the direct and indirect effects of climate factors on the belowground biomass proportion (BGBP). The average BGBP was 31.09% in natural forests and was significantly higher (38.75%) in planted forests. Furthermore, we observed a significant decrease in BGBP with increasing temperature and precipitation. Climate factors, particularly those affecting soil factors, such as pH, strongly affected the BGBP in natural and planted forests. Based on our results, we propose that future studies should consider the effects of forest type (natural or planted) and soil factors on BGBP.

Key words: aboveground and belowground biomass allocation, natural forest, planted forest, precipitation, soil factors, temperature

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