2025-11-04 中国科学院（CAS）
Web要約 の発言：
Location of the 58 plots along a gradient of ECM tree dominance in the subtropical mountainous forest. (Image by WBG)
＜関連情報＞
- https://english.cas.cn/newsroom/research_news/life/202511/t20251104_1095618.shtml
- https://www.sciencedirect.com/science/article/abs/pii/S037811272500670X
亜熱帯山岳林における樹木菌根の種類が生態系炭素貯蔵量に与える影響 Effects of tree mycorrhizal type on ecosystem carbon stock in a subtropical mountainous forest
Mengzhen Lu, Qiuxiang Tian, Qing He, Zhiyang Feng, Yuanzhi Qin, Xiaoxiang Zhao, Xiujuan Qiao, Yaozhan Xu, Feng Liu
Forest Ecology and Management Available online: 15 September 2025
DOI:https://doi.org/10.1016/j.foreco.2025.123162
Highlights
- ECM tree dominance is positively associated with tree biomass carbon mainly linking to the higher density of large-size trees.
- ECM tree dominance is positively associated with forest floor carbon mainly due to the lower litter quality of ECM trees.
- ECM tree dominance has no significant impact on soil carbon storage.
Abstract
Tree mycorrhizal associations could significantly affect forest carbon (C) stock. Although extensive research has been primarily conducted in temperate forest ecosystems, our understanding of how mycorrhizal types influence ecosystem C in subtropical forests, where arbuscular mycorrhizal (AM) and ectomycorrhizal (ECM) trees co-occur with varying dominance levels, is still limited. In this study, fifty-eight forest plots covering a natural gradient of ECM tree dominance (ECM%, calculated as the percentage of total basal area of ECM trees vs. all trees) were selected in a subtropical mountain forest. We investigated the relationships between ECM tree dominance and forest C stocks (tree biomass C, forest floor C, and soil C). The total forest C stock ranged from 15.57 to 38.93 Kg C m−2, and increased with ECM tree dominance. Specifically, tree biomass C and forest floor C stock accounted for 47.13 % and 3.43 % of the total forest C storage, respectively, and exhibited a positive relationship with ECM tree dominance. Soil C stock accounted for 49.44 % of the total forest C storage but showed no significant relationship with ECM tree dominance. The increase in tree biomass C with ECM tree dominance was linked to the higher density of large-size trees, whereas the higher forest floor C was mainly associated with lower litter quality. However, the larger vegetation C pool and litter C pool in plots with high ECM tree dominance did not lead to a greater soil C stock. These finding highlights the role of tree mycorrhizal type on ecosystem C stock in subtropical forests. Understanding these relationships is crucial for formulating effective C sequestration strategies to mitigate climate change.
