Life and death in the soil microbiome: how ecological processes influence biogeochemistry

Nature Reviews Microbiology, Journal Year: 2022, Volume and Issue: 20(7), P. 415 - 430

Published: Feb. 28, 2022

Language: Английский

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Dynamic interactions at the mineral–organic matter interface

Nature Reviews Earth & Environment, Journal Year: 2021, Volume and Issue: 2(6), P. 402 - 421

Published: May 11, 2021

Language: Английский

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Particulate organic matter as a functional soil component for persistent soil organic carbon

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: July 5, 2021

Abstract The largest terrestrial organic carbon pool, in soils, is regulated by an intricate connection between plant inputs, microbial activity, and the soil matrix. This manifested how microorganisms, key players transforming plant-derived into carbon, are controlled physical arrangement of inorganic particles. Here we conduct incubation isotopically labelled litter to study effects structure on fate litter-derived matter. While activity fungal growth enhanced coarser-textured soil, show that occlusion matter aggregates formation organo-mineral associations occur concurrently fresh surfaces regardless structure. These two mechanisms—the most prominent processes contributing persistence matter—occur directly at plant–soil interfaces, where constitute a nucleus build-up persistence. We extend notion litter, i.e., particulate matter, from solely easily available labile substrate, functional component which determined.

Language: Английский

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Soil organic matter formation, persistence, and functioning: A synthesis of current understanding to inform its conservation and regeneration

Advances in agronomy, Journal Year: 2022, Volume and Issue: unknown, P. 1 - 66

Published: Jan. 1, 2022

Language: Английский

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Speciation of heavy metals in soils and their immobilization at micro-scale interfaces among diverse soil components

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 825, P. 153862 - 153862

Published: Feb. 15, 2022

Heavy metal (HM) pollution of soils is a globally important ecological and environmental problem. Previous studies have focused on i) tracking sources in HM-contaminated soils, ii) exploring the adsorption capacity distribution HMs, iii) assessing phyto-uptake HMs their ecotoxicity. However, few reviews systematically summarized HM soil-plant systems over past decade. Understanding mechanisms interaction between solid soil components consequently key to effectively controlling remediating pollution. compositions phases are diverse, structures complex, spatial arrangements heterogeneous, all leading formation micro-domains that exhibit different particle sizes surface properties. The various interactions ultimately control speciation, transformation, bioavailability soils. Over decades, extensive application advanced instrumental techniques methods has greatly expanded our understanding behavior organic mineral assemblages. In this review, investigating immobilization by minerals, compounds, microorganisms, associated complexes summarized, with particular emphasis interfacial HMs. addition, for analyzing speciation aggregates natural also discussed. Moreover, we review speciating at mineral-organic micro-scale interfaces. Lastly, developmental prospects research inorganic-organic interfaces outlined. future research, most should be used characterize situ characteristics metals complexes. particular, roles contributions microorganisms complex require significant further investigation.

Language: Английский

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Global distribution, formation and fate of mineral‐associated soil organic matter under a changing climate: A trait‐based perspective

Functional Ecology, Journal Year: 2022, Volume and Issue: 36(6), P. 1411 - 1429

Published: March 7, 2022

Abstract Soil organic matter (SOM) is the largest actively cycling reservoir of terrestrial carbon (C), and majority SOM in Earth's mineral soils (~65%) mineral‐associated (MAOM). Thus, formation fate MAOM can exert substantial influence on global C cycle. To predict future changes to climate, it critical mechanistically understand processes by which formed decomposed, accurately represent this process‐based understanding biogeochemical Earth system models. In review, we use a trait‐based framework synthesize interacting roles plants, soil micro‐organisms, matrix regulating decomposition. Our proposed differentiates between plant microbial traits that total OM inputs (‘feedstock traits’) versus proportion are ultimately incorporated into (‘MAOM traits’). We discuss how these feedstock may be altered warming, precipitation elevated dioxide. At planetary scale, help shape distribution across biomes, modulate biome‐specific responses climate change. leverage synthesis measurements provide estimates amount MAOM‐C globally (~840–1540 Pg C; 34%–51% C), its biomes. show concentration highest temperate forests grasslands, lowest shrublands savannas. Grasslands croplands have (SOC) fraction (i.e. MAOM‐C:SOC ratio), while boreal tundra ratio. Drawing our trait framework, then review experimental data posit effects change pools different conclude discussing integrated models, included also summarize projected under scenarios (Representative Concentration Pathways 4.5 8.5) key model uncertainties. Read free Plain Language Summary for article Journal blog.

Language: Английский

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Clarifying the evidence for microbial‐ and plant‐derived soil organic matter, and the path toward a more quantitative understanding

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(24), P. 7167 - 7185

Published: Aug. 31, 2022

Predicting and mitigating changes in soil carbon (C) stocks under global change requires a coherent understanding of the factors regulating organic matter (SOM) formation persistence, including knowledge direct sources SOM (plants vs. microbes). In recent years, conceptual models have emphasized primacy microbial-derived inputs, proposing that microbial physiological traits (e.g., growth efficiency) are dominant controls on quantity. However, quantitative studies challenged this view, suggesting plants make larger contributions to than is currently recognized by paradigm. review, we attempt reconcile these perspectives highlighting variation across estimates plant- versus may arise part from methodological limitations. We show all major methods used estimate plant substantial shortcomings, uncertainty our current estimates. demonstrate there significant overlap chemical signatures compounds produced microbes, roots, through extracellular decomposition litter, which introduces into use common biomarkers for parsing SOM, especially mineral-associated (MAOM) fraction. Although review contributed deeper limitations with constrain light advances, suggest now critical time re-evaluate long-standing methods, clearly define their limitations, develop strategic plan improving quantification SOM. From synthesis, outline key questions challenges future research mechanisms stabilization pathways.

Language: Английский

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Mechanisms of soil organic carbon stability and its response to no‐till: A global synthesis and perspective

Global Change Biology, Journal Year: 2021, Volume and Issue: 28(3), P. 693 - 710

Published: Nov. 2, 2021

Mechanisms of soil organic carbon (SOC) stabilization have been widely studied due to their relevance in the global cycle. No-till (NT) has frequently adopted sequester SOC; however, limited information is available regarding whether sequestered SOC will be stabilized for long term. Thus, we reviewed mechanisms affecting stability NT systems, including priming effects (PE), molecular structure SOC, aggregate protection, association with minerals, microbial properties, and environmental effects. Although a more steady-state observed compared conventional tillage (CT), may depend on physical chemical protection. On average, improves macro-aggregation by 32.7%, lowers mineralization macro-aggregates CT. Chemical protection also important direct adsorption molecules enhancement aggregation minerals. Higher activity could produce binding agents promote formation metal-oxidant complexes. residues soils over term through attachment mineral surfaces entrapment aggregates under NT. reduces 18.8% PE intensities after fresh inputs 21.0% CT (p < .05). higher temperature sensitivity (Q10 ) greater Q10 macro-aggregates, an increase moisture regime potentially constrain improvement . This review process-based understanding mechanism that can act, independently or interactively, enhance preservation. It concluded systems likely

Language: Английский

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Coupled iron cycling and organic matter transformation across redox interfaces

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(9), P. 659 - 673

Published: Aug. 24, 2023

Language: Английский

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Unlocking complex soil systems as carbon sinks: multi-pool management as the key

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: June 15, 2023

Much research focuses on increasing carbon storage in mineral-associated organic matter (MAOM), which may persist for centuries to millennia. However, MAOM-targeted management is insufficient because the formation pathways of persistent soil are diverse and vary with environmental conditions. Effective must also consider particulate (POM). In many soils, there potential enlarging POM pools, can over long time scales, be a direct precursor MAOM. We present framework context-dependent strategies that recognizes soils as complex systems conditions constrain MAOM formation.

Language: Английский

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