A Global Meta‐Analysis of Land Use Change on Soil Mineral‐Associated and Particulate Organic Carbon DOI Open Access
Yuqing Zhao,

Yulin Xu,

Xinyu Cha

et al.

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

Increased Mineral‐Associated Organic Carbon and Persistent Molecules in Allochthonous Blue Carbon Ecosystems DOI Open Access
Yuan Li, Chuancheng Fu, Chenglong Ye

et al.

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

Citations

1
Effects of Herbaceous Plant Encroachment on the Soil Carbon Pool in the Shrub Tundra of the Changbai Mountains DOI Open Access

Xiaoyun Xu,

Yinghua Jin, Jiawei Xu

et al.

Forests, Journal Year: 2025, Volume and Issue: 16(2), P. 197 - 197

Published: Jan. 22, 2025

Under global warming, vegetation composition changes induced by plant encroachment have a significant impact on the carbon balance of tundra ecosystems. The herbaceous plants into indigenous shrub communities has changed aboveground and belowground litter input characteristics in Changbai Mountains. However, variations dynamics soil organic (SOC) pool concentrations SOC stability remains ambiguous. In this study, samples were collected for lab experiments. Our results showed that increase due to Deyeuxia purpurea increased concentration. Simultaneously, D. decreased C/N decreasing components both resistant decomposition (C/N lignin/N) mineralization ability available N concentrations, CO2 release rate, ultimately enhanced capacity increasing concentration molecular structures, such as carbohydrates, litter, thereby decomposable structures active soil, while simultaneously reducing recalcitrant carbon. Even more, reduced capability nitrogen concentration, which collectively oxidation state (COX) stability. general, warming led encroachment, inputs properties tundra, turn stability, enhancing emission capacity, atmospheric forming vicious cycle.

Language: Английский

Citations

1
Temperature effects on soil mineral-protected organic carbon are regulated by lithology in humid subtropical forests DOI
Tang Li, Wei Zhang, Peilei Hu

et al.

CATENA, Journal Year: 2025, Volume and Issue: 250, P. 108772 - 108772

Published: Jan. 26, 2025

Language: Английский

Citations

1
Unprotected carbon dominates decadal soil carbon increase DOI Creative Commons
Minglong Liu, Shilu Zheng, Elise Pendall

et al.

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

Published: Feb. 27, 2025

Language: Английский

Citations

1
A Global Meta‐Analysis of Land Use Change on Soil Mineral‐Associated and Particulate Organic Carbon DOI Open Access
Yuqing Zhao,

Yulin Xu,

Xinyu Cha

et al.

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

Citations

1