Warmer Climate Reduces the Carbon Storage, Stability and Saturation Levels in Forest Soils

Earth s Future, Journal Year: 2025, Volume and Issue: 13(2)

Published: Jan. 30, 2025

Abstract Forest soils store about one‐fifth of the global terrestrial biosphere carbon stock. However, our understanding how soil geochemical, plant and microbial factors regulate forest organic (SOC) storage, stability, saturation levels remains limited. Here, we conducted a sampling campaign across 5000‐km natural transect in China, measuring climate, geochemical SOC fractions with varying stability. Additionally, compiled data set major biomes. Our field survey synthesis consistently demonstrate that warmer climates not only reduce content labile particle matter (POM), but also decrease typically stable mineral‐associated (MAOM), leading to significant decline total storage. promote crystallization Fe/Al oxides, which decreases formation efficiency oxide associated complexes. Consequently, mineralogical level declines from boreal forests (37%) tropical (25%). findings underscore that, beyond well‐established climate impacts, properties play pivotal role shaping composition latitudes. This highlights colder regions harbor larger more pools, ongoing warming shift could potentially lead storage its capacity mitigate change.

Language: Английский

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Paleoclimate contributes to soil carbon storage in subtropical shrublands

Agricultural and Forest Meteorology, Journal Year: 2025, Volume and Issue: 368, P. 110528 - 110528

Published: April 6, 2025

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Radiocarbon Isotopic Disequilibrium Shows Little Incorporation of New Carbon in Mineral Soils of a Boreal Forest Ecosystem

Journal of Geophysical Research Biogeosciences, Journal Year: 2024, Volume and Issue: 129(9)

Published: Aug. 31, 2024

Abstract Boreal forests fix substantial amounts of atmospheric carbon (C). However, the timescales at which this C is cycled through ecosystem are not yet well understood. To elucidate temporal dynamics between photosynthesis, allocation and respiration, we assessed radiocarbon () disequilibrium ( D ) different pools current atmosphere to understand fate in a boreal forest ecosystem. Samples vegetation, fungi, soil were collected Integrated Carbon Observation System station Svartberget northern Sweden. Additionally, analyzed C‐ from incubated topsoil floor respiration (FFSR) over 24‐hr cycle, calculated signature total Re using Miller‐Tans method. We found that vegetation presented positive enriched with bomb , suggesting fast‐cycling rate (months years) for living biomass intermediate (years decades) dead biomass. In contrast, mineral soils showed negative indicating minimal incorporation . FFSR diurnal variability (mean = 8.5‰), predominance autotrophic recently fixed labile C. Calculations (median 12.7‰) demonstrate days decades. Although stores significant C, most it organic layer where relatively fast. Only recent incorporated into long despite stocks being old.

Language: Английский

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Spatial distribution of soil organic carbon across diverse vegetation types in a tidal wetland

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 209, P. 117203 - 117203

Published: Nov. 1, 2024

Language: Английский

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