文献类型：期刊文献

英文题名：Effects of stand structural changes on vegetation carbon sequestration capacity during secondary succession in subtropical evergreen-deciduous broadleaved mixed forests in central China

作者：Wu, Juyang[1,3] Xiang, Qin[2,4] Xia, Yongzhi[1] Lei, Jingpin[3] Ai, Xunru[2] Wang, Zhengxiang[1] Zhu, Jiang[2]

第一作者：Wu, Juyang

通信作者：Wang, ZX[1];Zhu, J[2]

机构：[1]Hubei Univ, Fac Resources & Environm Sci, Wuhan 430062, Peoples R China;[2]Hubei Minzu Univ, Coll Forestry & Hort, Enshi 445000, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[4]Southwest Forestry Univ, Coll Forestry, Kunming 650000, Peoples R China

年份：2025

卷号：396

外文期刊名：JOURNAL OF ENVIRONMENTAL MANAGEMENT

收录：;EI(收录号：20254819581177);Scopus(收录号：2-s2.0-105022610888);WOS:【SCI-EXPANDED(收录号:WOS:001629671600006)】；

基金：The present investigation was financially supported by the National Key R & D Program of China [2023YFE0112804, 2023YFE0112805 and 2023YFD2200405] , the Scientific Research Project of the Educational Commission of Hubei Province [Q20221903] , and the Open Foundation of the Key Laboratory of Regional Development and Environmental Response, Hubei Province [2022 (B) 001] . We are also sincerely grateful to all research personnel for their diligent efforts in data collection and to the Mulinsi National Nature Reserve of Hubei Province for its invaluable support of this study.

语种：英文

外文关键词：Biomass carbon dynamics; Spatial structure; Non-spatial structure; Secondary succession; Subtropical mixed forest; Sustainable forest management

摘要：In the context of global climate change, stand structure is a critical lever for enhancing forest carbon sink capacity because it is amenable to management. Leveraging inventory data gathered in 2014 and 2019 from forty-two 20 x 20 m permanent plots of evergreen-deciduous broadleaved mixed forest, encompassing three successional phases (secondary stands 20 years and 35 years subsequent to logging, and undisturbed old-growth forest), this research integrated species - specific allometric equations with field measurements to quantify vegetation carbon density and annual carbon sequestration rates. We further disentangled how stand non-spatial structure (plot-level average characteristics such as diameter-class distribution and stem density) and stand spatial structure (distance-dependent indices derived from tree coordinates and mixing patterns) regulate carbon sink capacity. The principal findings are as follows. (1) Secondary succession markedly increased stand-level structural complexity and stability; carbon sequestration rates peaked at the mid-successional stage, with the tree layer emerging as the principal contributor to carbon storage. (2) Across all plots, structural diversity and competition intensity were the most powerful predictors of carbon-sink function. (3) Spatial structure exerted direct effects on canopy-layer sequestration, playing a pivotal role during early succession, while non-spatial structure increasingly regulated understory carbon dynamics and overall carbon accumulation in mature forests. (4) The synergy between spatial and non-spatial structure provides a dual mechanism: In younger stands, competition-oriented target tree management enhances annual carbon sequestration rates over short temporal scales, whereas in mature stands, the maintenance of structural heterogeneity and large-tree cohorts is linked to greater carbon storage capacity and enhanced long-term stability across decadal timescales. Taken together, the study underscores the multi-layered, multi-pathway coupling between stand structure and ecosystem function in subtropical evergreen-deciduous mixed forests, furnishes a science-based framework for structure-oriented carbon enhancement, and offers empirical guidance for sustainable forest management in pursuit of global carbonneutrality goals.