Fungi stimulate organic phosphorus fraction transformation in subtropical masson pine plantation soils after nine years of thinning and understory removal

作者：Zunji Jian, Lixiong Zeng, Lei Lei, Beat Frey, Changfu Liu, Yafei Shen, Jiajia Zhang, Wenfa Xiao, Mai–He Li · 发表于：Ecological Processes · 年份：2025 · DOI：10.1186/s13717-025-00586-0 · 被引用次数：8 · 研究领域：Soil Carbon and Nitrogen Dynamics、Forest Ecology and Biodiversity Studies、Peatlands and Wetlands Ecology

Abstract Background Phosphorus (P) availability in soils regulates forest productivity. However, the drivers of soil P dynamics following forest management remain poorly understood, particularly in P-deficient forests in tropical and subtropical regions. Method Soil samples of 0–10 cm were collected from the plots after 9 years of thinning and understory removal (UR) in Pinus massoniana plantations in subtropical China. Soil physicochemical properties, microbial biomass and community composition, and Hedley P fractions were measured to assess the underlying mechanisms for the dynamics of soil P fractions. Results Compared to undisturbed plots, total soil inorganic P (Pi; + 24%) within the dominant species thinning (DST) plots showed a significant increase, which was associated with the accrual in resin-Pi (+ 30%), NaHCO 3 -Pi (+ 21%), and C.CHl-Pi (+ 45%). These Pi fractions were primarily correlated with increased relative abundance of Ascomycota , Rozellomycota , and Proteobacteria . Conversely, post-management (thinning and UR) assessments revealed no significant changes in total P, total organic P (Po), and residual P. The observed decrease in total Po (– 9%) in DST plots was linked to reductions in NaHO-Po (– 7%) and C.CHl-Po (– 24%). Notably, these Po fractions were negatively affected by the relative abundance of Glomeromycota . Furthermore, variations in soil fungal and bacterial community structures accounted for 44.3% and 26.3% of the variances in soil Pi fractions,...