Microbial functional trait predicts soil organic carbon across soil aggregates in Northeastern China

IF 9.8 1区农林科学 Q1 SOIL SCIENCE

Soil Biology & Biochemistry Pub Date : 2025-03-21 DOI:10.1016/j.soilbio.2025.109793

Lina Sun, Shun Han

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引用次数: 0

Abstract

Soil aggregates offer diverse habitats for microorganisms, characterized by variations in microbial 16S rRNA gene operon (rrn) copy number, a valued functional trait indicative of microbial growth rates and organic matter availability, which is crucial for enhancing soil fertility, nutrient cycling, and ecosystem health. However, the impact of soil aggregate stratification on microbial functional traits, as reflected by rrn copy number, remains unclear. This study revealed that microbial taxonomic composition is significantly different in soil aggregate stratification, with microaggregates favoring higher community-level rrn copy numbers, potentially indicating the prevalence of microbial r-strategists compared to macroaggregates and silt+clay fractions. Additionally, strong positive correlations between soil organic carbon and community-level rrn copy number suggest that rrn copy number serves as a meaningful functional trait reflecting soil organic carbon availability. Overall, this finding provides new insights into how soil aggregate shapes the life-history strategies of microbial communities, soil organic matter content and promote soil health.

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来源期刊

Soil Biology & Biochemistry 农林科学-土壤科学

CiteScore

16.90

自引率

9.30%

发文量

312

审稿时长

49 days

期刊介绍： Soil Biology & Biochemistry publishes original research articles of international significance focusing on biological processes in soil and their applications to soil and environmental quality. Major topics include the ecology and biochemical processes of soil organisms, their effects on the environment, and interactions with plants. The journal also welcomes state-of-the-art reviews and discussions on contemporary research in soil biology and biochemistry.