生态学报2026，Vol.46Issue(8)：4396-4408,13.DOI:10.20103/j.stxb.202503310736
亚热带森林混合凋落物分解与群落功能特性、功能多样性和物种多样性的关系
Relationships between mixed litter decomposition and functional identity,functional diversity and species diversity of plant communities in subtropical forests
摘要
Abstract
Litter decomposition plays an important role in the material cycle of forest ecosystems,and the variation of litter diversity directly influences the degree and direction of mixed litter decomposition.This study conducted a one-year mixed decomposition experiment on the leaf litters of seven tree species in subtropical forests,with a total of 624 litter decomposition bags(39 treatments×4 recoveries×4 replicates),to investigate the effects of functional identity,functional diversity,and species diversity of plant communities on the decomposition of the total mass and different carbon fractions of the mixed leaf litter.The results showed that the mixing effects of the leaf litter total mass and different carbon fractions decomposition showed different nonadditive effects.Specifically,72%of the combinations for the total mass decomposition exhibited synergistic effects,all the combinations of the labile carbon fractions showed antagonistic effects,56%of the combinations of acid-hydrolyzable carbon fractions showed antagonistic effects,and 97%of the combinations of acid-unhydrolyzable carbon fractions showed synergistic effects.The decomposition of total mass and carbon fractions of mixed leaf litter was predominantly impacted by functional identity,not functional diversity or species diversity.The decomposition of total mass was mainly influenced by the significant negative effect of stoichiometric ratio,while labile carbon fractions were mainly influenced by the significant negative effect of physical properties and the significant positive effect of stoichiometric ratio,and acid-unhydrolyzable carbon fractions were mainly influenced by the significant negative effect of chemical properties.Therefore,distinguishing different carbon fractions of litter to analyze their diversity effects could provide a reference for exploring the mechanism of diversity effects in the decomposition of total litter mass.关键词
混合凋落叶/碳组分/非加和效应/功能多样性/凋落物性状Key words
mixed leaf litter/carbon fraction/nonadditive effect/functional diversity/litter trait引用本文复制引用
周光,徐鸣,万静,谷振军,吴成秀,丁伟,龚斌,杜强,杨春霞..亚热带森林混合凋落物分解与群落功能特性、功能多样性和物种多样性的关系[J].生态学报,2026,46(8):4396-4408,13.基金项目
江西省林业科学院基础研究与人才科研专项(2022512901,2024512901,2025522902) （2022512901,2024512901,2025522902）
江西省重点研发计划项目(20212BBF63018) （20212BBF63018）
