Effects of tree mycorrhizal type on ecosystem carbon stock in a subtropical mountainous forest

IF 3.7 2区农林科学 Q1 FORESTRY

Forest Ecology and Management Pub Date : 2025-09-15 DOI:10.1016/j.foreco.2025.123162

Mengzhen Lu , Qiuxiang Tian , Qing He , Zhiyang Feng , Yuanzhi Qin , Xiaoxiang Zhao , Xiujuan Qiao , Yaozhan Xu , Feng Liu

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引用次数: 0

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.

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树木菌根类型对亚热带山地森林生态系统碳储量的影响

树木菌根结合力对森林碳(C)储量影响显著。虽然广泛的研究主要是在温带森林生态系统中进行的，但我们对菌根类型如何影响亚热带森林生态系统C的理解仍然有限，在亚热带森林中，丛枝菌根（AM）和外生菌根（ECM）树木以不同的优势水平共存。本研究在亚热带山地森林中选择了58个覆盖ECM树优势度自然梯度（ECM%，计算方法为ECM树总基面积与所有树木的百分比）的样地。我们研究了ECM树种优势度与森林碳储量（树木生物量碳、森林地面碳和土壤碳）之间的关系。森林总碳蓄积量在15.57 ~ 38.93 Kg C m−2之间，随ECM树优势度的增加而增加。其中，树木生物量C和森林地表C储量分别占森林总储量的47.13 %和3.43 %，且与ECM乔木优势度呈正相关。土壤碳储量占森林总碳储量的49.44 %，但与ECM树优势度关系不显著。ECM优势树生物量C的增加主要与大乔木密度的增加有关，而森林地表C的增加主要与凋落物质量的降低有关。但ECM乔木优势度高的样地，植被C库和凋落物C库的增大并未导致土壤C储量的增大。这些发现强调了树木菌根类型对亚热带森林生态系统C储量的影响。了解这些关系对于制定有效的碳封存策略以减缓气候变化至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Forest Ecology and Management 农林科学-林学

CiteScore

7.50

自引率

10.80%

发文量

665

审稿时长

39 days

期刊介绍： Forest Ecology and Management publishes scientific articles linking forest ecology with forest management, focusing on the application of biological, ecological and social knowledge to the management and conservation of plantations and natural forests. The scope of the journal includes all forest ecosystems of the world. A peer-review process ensures the quality and international interest of the manuscripts accepted for publication. The journal encourages communication between scientists in disparate fields who share a common interest in ecology and forest management, bridging the gap between research workers and forest managers. We encourage submission of papers that will have the strongest interest and value to the Journal''s international readership. Some key features of papers with strong interest include: 1. Clear connections between the ecology and management of forests; 2. Novel ideas or approaches to important challenges in forest ecology and management; 3. Studies that address a population of interest beyond the scale of single research sites, Three key points in the design of forest experiments, Forest Ecology and Management 255 (2008) 2022-2023); 4. Review Articles on timely, important topics. Authors are welcome to contact one of the editors to discuss the suitability of a potential review manuscript. The Journal encourages proposals for special issues examining important areas of forest ecology and management. Potential guest editors should contact any of the Editors to begin discussions about topics, potential papers, and other details.