Land use and mineral type jointly control stability of newly formed mineral-associated organic matter

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 31, 2025

Formation of mineral-associated organic matter (MAOM) is a key process in the global carbon cycle, stabilising C (OC) soils. The relative importance mineral composition and land use as potential controls MAOM stability at regional scales underlying microbial processes are still unresolved. Here, we assessed formed on goethite (iron oxide) illite (phyllosilicate clay) exposed for five years topsoils 68 forest grassland sites across Germany. We incubated newly MAOM, determined its extractability, analysed functioning associated communities. Decomposition was always significantly lower than illite, highlighting that higher OC accumulation not exclusively due to larger sorption capacity. Instead, reduced extractability phosphorus-acquiring enzyme activities indicated stronger substrate limitation growth illite. Across two minerals, decomposition consistently forests grasslands, relating greater nutrient constraints different community forests. Overall, type explained almost similar proportions variance decomposition. pronounced effect underlines responsiveness environmental change.

Language: Английский

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Soil Acidification Destabilizes Terrestrial Ecosystems via Decoupling Soil Microbiome

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(4)

Published: April 1, 2025

Soil microbiome is essential for terrestrial ecosystem preservation. β-diversity information on the former, although dynamic due to its sensitivity environmental conditions driven by climate change, limited. Our knowledge becomes poorer microbiomes subjected gradients, especially those across multiple ecosystems-information important biological conservation management. In this study, using next generation sequencing and machine learning at samples from 207 locations among 4300 km of transects that spanned six typical ecosystems China, we established divergent distance-decay relationships between bacterial eukaryotic communities in response soil pH (pH as proxy edaphic conditions). The findings, pH-decrease results lower (convergent tendency) opposite ones (low pH-high (divergent tendency)). Meanwhile, competition bacteria eukaryotes intensifies while predominant genera are re-structured. Under these circumstances, potential acidification change or other factors could alter into decoupling directions influencing ecosystems' stability. Thus, a pivotal variable not only describes, but also controls, dynamics large scale under ongoing global changes; hence, cornerstone biodiversity China's nature protected areas only.

Language: Английский

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Paddy soil fertility shifts microbial metabolic quotient by regulating the selective enrichment of specific bacterial groups

Geoderma, Journal Year: 2025, Volume and Issue: 457, P. 117303 - 117303

Published: April 20, 2025

Language: Английский

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Nitrogen addition induces microbial phosphorus limitations in bulk soil but not in rhizospheric soil: A global analysis

Soil and Tillage Research, Journal Year: 2025, Volume and Issue: 252, P. 106609 - 106609

Published: April 24, 2025

Language: Английский

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Functional Trait Diversity in Overstorey and Understorey Enhances Microbial Carbon Use Efficiency in Forest Plantation Soils

Published: Jan. 1, 2025

Language: Английский

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