Emerging multiscale insights on microbial carbon use efficiency in the land carbon cycle

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Сен. 13, 2024

Microbial carbon use efficiency (CUE) affects the fate and storage of in terrestrial ecosystems, but its global importance remains uncertain. Accurately modeling predicting CUE on a scale is challenging due to inconsistencies measurement techniques complex interactions climatic, edaphic, biological factors across scales. The link between microbial soil organic relies stabilization necromass within aggregates or association with minerals, necessitating an integration processes approaches. In this perspective, we propose comprehensive framework that integrates diverse data sources, ranging from genomic information traditional assessments, refine cycle models by incorporating variations CUE, thereby enhancing our understanding contribution cycling.

Язык: Английский

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Greater Root Biomass Offsets Soil Organic Carbon Loss Under Climate Change in Rice Paddies

Опубликована: Янв. 1, 2025

Язык: Английский

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Paleoclimate contributes to soil carbon storage in subtropical shrublands

Agricultural and Forest Meteorology, Год журнала: 2025, Номер 368, С. 110528 - 110528

Опубликована: Апрель 6, 2025

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A large global soil carbon sink informed by repeated soil samplings

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

Abstract Partitioning the terrestrial carbon sink between vegetation and soil is crucial for predicting future climate change, but role of soils remains poorly quantified. Here, we compiled 3,099 organic time series spanning five decades. We found a global 1.83 ± 0.9 (mean SE) petagrams per year from 1992 to 2020, driven by extratropical young forests, boreal old grasslands, while trends in tropical ecosystems remain uncertain. Our findings suggest net land resides almost exclusively belowground as carbon, emphasizing opportunity conservation restoration mitigation.

Язык: Английский

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Temporal and Spatial Dynamics of Soil Carbon Cycling and Its Response to Environmental Change in a Northern Hardwood Forest

Global Change Biology, Год журнала: 2025, Номер 31(5)

Опубликована: Май 1, 2025

ABSTRACT The timescales over which soil carbon responds to global change are a major uncertainty in the terrestrial cycle. Radiocarbon measurements on archived samples an important tool for addressing this uncertainty. We present time series (1969–2023) of radiocarbon litter (Oi/Oe and Oa/A) mineral (0–10 cm) soils from Hubbard Brook Experimental Forest, predominantly hardwood forest northeastern USA. To estimate cycling rates, we built different autonomous linear compartmental models. found that cycles decadal (Oi/Oe: ~7 years), whereas at organic‐mineral interface (Oa/A), centennial (~104 302 years, respectively). At watershed‐level, system appears be steady‐state, with no observed changes stocks or rates study period, despite increases precipitation, temperature, pH. However, site‐level, Oi/Oe is losing (−15 g C m −2 year −1 since 1998). decline can detected when Oi Oe layers modeled separately. This pattern suggests rapidly layer smaller scale responding recent environmental changes. Our results highlight importance as “early‐warning system” responses change, well challenges detecting gradual across spatial scales natural ecosystems.

Язык: Английский

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Study of Soil Heterotrophic Respiration as a Function of Soil Moisture under Different Land Covers

Soil Biology and Biochemistry, Год журнала: 2024, Номер unknown, С. 109593 - 109593

Опубликована: Сен. 1, 2024

Язык: Английский

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Soil particulate organic carbon regulates microbial carbon use efficiency in subtropical forests under nitrogen addition in different seasons

Applied Soil Ecology, Год журнала: 2024, Номер 203, С. 105680 - 105680

Опубликована: Окт. 7, 2024

Язык: Английский

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Study of Heterotrophic Soil Respiration as a Function of Soil Water Potential Under Different Land Covers

Опубликована: Янв. 1, 2024

The relationship between heterotrophic soil respiration (Rh) and moisture conditions has been primarily studied using disturbed samples simple gravimetric volumetric indicators. objective of this study was to investigate the Rh in terms water-filled porosity (WFP) matric potential ([[EQUATION]]) undisturbed from different soils land covers. Soil CO2 efflux, WFP, [[EQUATION]] were simultaneously measured (250 cm3) collected 0-5 cm layer under laboratory by combining a gas analyzer, precision scale, mini-tensiometers. For each sample we also chemical properties, physical microbial composition phospholipid fatty acid analysis. Overall, peak rates Where highest grassland with mean value 1.88 (SD = 0.40) µmol m-2 s-1 lowest cropland 0.94 0.56) s-1. Soils riparian areas had like those grassland, 1.64 0.82) Our observations revealed that consistently occurred at WFP 0.81 [[EQUATION]]= -6 kPa regardless cover type. Thus, do not recommend typical definition field capacity as water held -33 represent optimal for activity. In relative Rh, simpler indicator better predictor than air-dry near saturation across contrasting textural classes, organic matter, types.

Язык: Английский

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Current understanding, knowledge gaps, and challenges of mountain permafrost research in the Chilean and Argentinean Andes

Journal of South American Earth Sciences, Год журнала: 2024, Номер unknown, С. 105165 - 105165

Опубликована: Сен. 1, 2024

Язык: Английский

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