Dominance of particulate organic carbon in top mineral soils in cold regions

Nature Geoscience, Journal Year: 2024, Volume and Issue: 17(2), P. 145 - 150

Published: Jan. 4, 2024

Language: Английский

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Global turnover of soil mineral-associated and particulate organic carbon

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 22, 2024

Abstract Soil organic carbon (SOC) persistence is predominantly governed by mineral protection, consequently, soil mineral-associated (MAOC) and particulate (POC) turnovers have different impacts on the vulnerability of SOC to climate change. Here, we generate global MAOC POC maps using 8341 observations then infer turnover times a data-model integration approach. Global storages are $${975}_{964}^{987}$$ 975 964 987 Pg C (mean with 5% 95% quantiles) $${330}_{323}^{337}$$ 330 323 337 C, while mean $${129}_{45}^{383}$$ 129 45 383 yr $${23}_{5}^{82}$$ 23 5 82 in top meter, respectively. Climate warming-induced acceleration decomposition greater subsoil than that topsoil. Overall, atlas turnover, together distributions stocks, provide benchmark for Earth system models diagnose SOC-climate change feedback.

Language: Английский

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Mineral-mediated stability of organic carbon in soil and relevant interaction mechanisms

Eco-Environment & Health, Journal Year: 2024, Volume and Issue: 3(1), P. 59 - 76

Published: Jan. 3, 2024

Soil, the largest terrestrial carbon reservoir, is central to climate change and relevant feedback environmental health. Minerals are essential components that contribute over 60% of soil storage. However, how interactions between minerals organic shape transformation stability remains poorly understood. Herein, we critically review primary mechanisms, including sorption, redox reaction, co-precipitation, dissolution, polymerization, catalytic reaction. These interactions, highly complex with combination multiple processes, greatly affect through following processes: (1) formation or deconstruction mineral-organic association; (2) oxidative minerals; (3) polymerization (4) varying association according mineral transformation. Several pieces evidence related turnover during interaction in real eco-environment then demonstrated. We also highlight current research gaps outline priorities, which may map future directions for a deeper mechanisms-based understanding storage capacity considering its minerals.

Language: Английский

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Dual roles of microbes in mediating soil carbon dynamics in response to warming

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 31, 2024

Abstract Understanding the alterations in soil microbial communities response to climate warming and their controls over carbon (C) processes is crucial for projecting permafrost C-climate feedback. However, previous studies have mainly focused on microorganism-mediated C release, little known about whether how affects anabolism subsequent input regions. Here, based a more than half-decade of situ experiment, we show that compared with ambient control, significantly reduces use efficiency enhances network complexity, which promotes heterotrophic respiration. Meanwhile, necromass markedly accumulates under likely due preferential decomposition plant-derived C, further leading increase mineral-associated organic C. Altogether, these results demonstrate dual roles microbes affecting release stabilization, implying feedback would weaken time dampened respiration increased proportion stable pool.

Language: Английский

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Biochar-amended soil can further sorb atmospheric CO2 for more carbon sequestration

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: Jan. 3, 2025

Input of biochar into soil is considered as an efficient technology for carbon sequestration. This work aimed to explore if the extra sorption dioxide (CO2) exists in biochar-amended soil, which has not yet received attention. Here we put and mineral-rich soils perform laboratory CO2 experiments. Our results demonstrate that all increased storage meanwhile further sorb more The Ca or Mg originated could react with eventually be converted inorganic carbonate minerals amended soil. Further, country-level prediction showed cultivated top application China achieve 7.38–12.5 billion tons sequestration additional 0.34–2.66 sorption. require us take consideration both sink assessment potential Application [5%] sequester around 10 China's soils, according experiments pristine four different applications.

Language: Английский

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A Global Meta‐Analysis of Land Use Change on Soil Mineral‐Associated and Particulate Organic Carbon

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(3)

Published: March 1, 2025

ABSTRACT Separating soil organic carbon (SOC) into mineral‐associated (MAOC) and particulate (POC) enables accurate prediction of SOC vulnerability to land use change (LUC). Here, we synthesize the responses MAOC POC LUC, including restoration degradation, from 693 observations globally. We observed a large increase in after greater decline but magnitude proportion these two fractions (fMAOC fPOC) varied with LUC. POC, comparison MAOC, responded more sensitively suggesting that was vulnerable environmental change. Using duration relationships, found fraction (fPOC) higher at early stage lower late stage, projecting stability declined short‐term gradually increased long‐term restoration. Further analysis showed context‐dependent effects LUC on fractions: arid or carbon‐poor topsoil, greatly fPOC, while humid carbon‐rich degradation resulted decreases especially POC. Overall, highlight importance fractions, particularly predicting suggest incorporating climate initial status models dynamics helps accurately predict future sink potential.

Language: Английский

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Significant contribution of different sources of particulate organic matter to the photoaging of microplastics

Water Research, Journal Year: 2024, Volume and Issue: 251, P. 121173 - 121173

Published: Jan. 21, 2024

Language: Английский

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Nitrogen addition-driven soil organic carbon stability depends on the fractions of particulate and mineral-associated organic carbon

Nutrient Cycling in Agroecosystems, Journal Year: 2024, Volume and Issue: 128(2), P. 269 - 281

Published: March 23, 2024

Language: Английский

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Short-term warming supports mineral-associated carbon accrual in abandoned croplands

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 2, 2025

Effective soil organic carbon (SOC) management can mitigate the impact of climate warming. However, response different SOC fractions to warming in abandoned croplands remains unclear. Here, categorizing into particulate and mineral-associated (POC MAOC) with physical fractionation, we investigate responses POC MAOC content temperature sensitivity (Q10) through a 3-year situ experiment (+1.6 °C) across 12 sites China (latitude: 22.33–46.58°N). Our results indicate that unchanged while significantly increases under changes are mainly influenced by root biomass microbial necromass changes, respectively. The Q10 is lower than regardless or control treatment, suggesting represents most persistent least vulnerable fraction within SOC. Collectively, sequestration stable be enhanced short-term Natural recovery generally benefits accrual croplands, but on this ecosystem authors showed enhances these lands.

Language: Английский

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Increased Mineral‐Associated Organic Carbon and Persistent Molecules in Allochthonous Blue Carbon Ecosystems

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(1)

Published: Jan. 1, 2025

ABSTRACT Coastal wetlands contain very large carbon (C) stocks—termed as blue C—and their management has emerged a promising nature‐based solution for climate adaptation and mitigation. The interactions among sources, pools, molecular compositions of soil organic C (SOC) within ecosystems (BCEs) remain elusive. Here, we explore these along an 18,000 km long coastal line salt marshes, mangroves, seagrasses in China. We found that mineral‐associated (MAOC) is enriched BCEs dominated by allochthonous inputs abundant active minerals, leading to increased proportion persistent molecules. Specifically, soils with (> 50%) are characterized substantial contribution MAOC 70%) total SOC notable preservation lipids (36%) across seagrasses. burial particles, derived from external sources such rivers or tidal influxes, facilitates the formation stable through binding mineral surfaces occlusion microaggregates. proportions particulate (POC) important predictors matter. Lipid composition decrease POC autochthonous increase. These findings provide new insights into coupled control over sequestration BCEs, emphasizing role inputs, components.

Language: Английский

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