Seasonal variations affect the ecosystem functioning and microbial assembly processes in plantation forest soils

作者：Min Wang, Abolfazl Masoudi, Can Wang, Liqiang Zhao, Jiawei Yang, Zhijun Yu, Jingze Liu · 发表于：Frontiers in Microbiology · 年份：2024 · DOI：10.3389/fmicb.2024.1391193 · 被引用次数：9 · 研究领域：Microbial Community Ecology and Physiology、Land Use and Ecosystem Services、Soil Carbon and Nitrogen Dynamics

While afforestation mitigates climate concerns, the impact of afforestation on ecological assembly processes and multiple soil functions (multifunctionality) in afforested areas remains unclear. The Xiong’an New Area plantation forests ( Pinus and Sophora forests) in North China were selected to examine the effects of plantation types across four distinct seasons on soil microbiomes. Three functional categories (nutrient stocks, organic matter decomposition, and microbial functional genes) of multifunctionality and the average (net) multifunctionality were quantified. All these categories are directly related to soil functions. The results showed that net soil multifunctionality as a broad function did not change seasonally, unlike other narrow functional categories. Bacterial communities were deterministically (variable selection and homogenous selection) structured, whereas the stochastic process of dispersal limitation was mainly responsible for the assembly and turnover of fungal and protist communities. In Pinus forests, winter initiates a sudden shift from deterministic to stochastic processes in bacterial community assembly, accompanied by decreased Shannon diversity and heightened nutrient cycling (nutrient stocks and organic matter decomposition). This indicates the potential vulnerability of deterministic assembly to seasonal fluctuations, particularly in environments rich in nutrients. The results predicted that protist community composition was uniquely structured...