树木多样性驱动不同森林类型的林下碳储存,而不是林上碳储存

IF 3.4 2区 农林科学 Q1 FORESTRY Journal of Forestry Research Pub Date : 2024-09-11 DOI:10.1007/s11676-024-01776-w
Saif Ullah, Jianping Wu, Jawad Ali Shah, Xuemei Wang, Yueming Lyu, Zhiwen Guo, Kashif Ali, Deyun Chen, Han Sun
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引用次数: 0

摘要

尽管许多研究都提出了林分结构、植物多样性和环境条件对森林生态系统碳储量的具体和相对影响的解释,但要理解这些因素如何共同影响不同群落层(乔木、灌木和草本植物)和森林类型(混交林、阔叶林(E)、阔叶林(M)和针叶林)的碳储量仍然是一个挑战。为了解决这个问题,我们使用结构方程模型来量化各种森林类型中生物因素(平均 DBH、平均高度、最大高度、茎干密度和基部面积)和非生物因素(海拔高度和树冠开阔度)以及物种多样性指标(香农-维纳指数、辛普森指数和皮鲁均匀度)的影响。我们的分析表明,森林类型和海拔在解释上层碳储量的大部分变化方面起着关键作用,林分因子(平均 DBH 和基部面积)的影响适中,树种多样性(香农-维纳指数)的影响略微负面。值得注意的是,森林高度是预测草本层碳储量的主要因素。回归关系进一步凸显了树种多样性对森林生态系统中平均高度、林下碳储量和枝条生物量的重要贡献。我们从上层C储量的结构方程建模中得出的关于树种多样性的见解表明,在温带森林的统计推理中,树种多样性的影响可能会受到茎干生物量的影响。进一步的研究还应将树种多样性与树木成分生物量、森林平均高度、林下碳储量和树冠开阔度结合起来,以了解复杂的关系,并在面对全球气候挑战时维持健康和可持续的生态系统。
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Tree diversity drives understory carbon storage rather than overstory carbon storage across forest types

Although numerous studies have proposed explanations for the specific and relative effects of stand structure, plant diversity, and environmental conditions on carbon (C) storage in forest ecosystems, understanding how these factors collectively affect C storage in different community layers (trees, shrubs, and herbs) and forest types (mixed, broad-leaved (E), broad-leaved (M), and coniferous forest) continues to pose challenges. To address this, we used structural equation models to quantify the influence of biotic factors (mean DBH, mean height, maximum height, stem density, and basal area) and abiotic factors (elevation and canopy openness), as well as metrics of species diversity (Shannon–Wiener index, Simpson index, and Pielou’s evenness) in various forest types. Our analysis revealed the critical roles of forest types and elevation in explaining a substantial portion of variability in C storage in the overstory layer, with a moderate influence of stand factors (mean DBH and basal area) and a slightly negative impact of tree species diversity (Shannon–Wiener index). Notably, forest height emerged as the primary predictor of C storage in the herb layer. Regression relationships further highlighted the significant contribution of tree species diversity to mean height, understory C storage, and branch biomass within the forest ecosystem. Our insights into tree species diversity, derived from structural equation modeling of C storage in the overstory, suggest that the effects of tree species diversity may be influenced by stem biomass in statistical reasoning within temperate forests. Further research should also integrate tree species diversity with tree components biomass, forest mean height, understory C, and canopy openness to understand complex relationships and maintain healthy and sustainable ecosystems in the face of global climate challenges.

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来源期刊
CiteScore
7.30
自引率
3.30%
发文量
2538
期刊介绍: The Journal of Forestry Research (JFR), founded in 1990, is a peer-reviewed quarterly journal in English. JFR has rapidly emerged as an international journal published by Northeast Forestry University and Ecological Society of China in collaboration with Springer Verlag. The journal publishes scientific articles related to forestry for a broad range of international scientists, forest managers and practitioners.The scope of the journal covers the following five thematic categories and 20 subjects: Basic Science of Forestry, Forest biometrics, Forest soils, Forest hydrology, Tree physiology, Forest biomass, carbon, and bioenergy, Forest biotechnology and molecular biology, Forest Ecology, Forest ecology, Forest ecological services, Restoration ecology, Forest adaptation to climate change, Wildlife ecology and management, Silviculture and Forest Management, Forest genetics and tree breeding, Silviculture, Forest RS, GIS, and modeling, Forest management, Forest Protection, Forest entomology and pathology, Forest fire, Forest resources conservation, Forest health monitoring and assessment, Wood Science and Technology, Wood Science and Technology.
期刊最新文献
Applying palaeoecological analogues to contemporary challenges: community-level effects of canopy gaps caused by systematic decline of a prevalent tree species A stacking-based model for the spread of Botryosphaeria laricina Leaf functional traits and ecological strategies of common plant species in evergreen broad-leaved forests on Huangshan Mountain Characteristics and expression of heat shock gene Lghsp17.4 in Lenzites gibbosa, a white rot fungus of wood Tree diversity drives understory carbon storage rather than overstory carbon storage across forest types
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