Global net climate effects of anthropogenic reactive nitrogen

Nature, Год журнала: 2024, Номер 632(8025), С. 557 - 563

Опубликована: Июль 24, 2024

Anthropogenic activities have substantially enhanced the loadings of reactive nitrogen (Nr) in Earth system since pre-industrial times

Язык: Английский

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Fire-driven disruptions of global soil biochemical relationships

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 30, 2025

Fires alter the stability of organic matter and promote soil erosion which threatens fundamental coupling biogeochemical cycles. Yet, how biogeochemistry its environmental drivers respond to fire remain virtually unknown globally. Here, we integrate experimental observations random forest model, reveal significant divergence in responses attributes fire, including carbon (C), nitrogen (N), phosphorus (P) contents worldwide. Fire generally decreases C, has non-significant impacts on total N, while it increases inorganic N P, with some effects persisting for decades. The are most strongly negative cold climates, conifer forests, under wildfires high intensity frequency. Our work provides evidence that decouples globally helps identify high-priority ecosystems where critical components especially unbalanced by is management a world subjected more severe, recurrent, further-reaching wildfires.

Язык: Английский

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Recoupling of Soil Carbon, Nitrogen, and Phosphorus Cycles along a 30 Year Fire Chronosequence in Boreal Forests of China

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 20, 2025

The biogeochemical coupling of soil carbon, nitrogen, and phosphorus (C-N-P) cycles is crucial for maintaining the ecological balance boreal forests. Yet, current understanding wildfire disturbance only based on changes in elemental contents, thereby lacking any within-ecosystem corroboration coupling. Here, we conducted a field survey microbial functional associations 53 genes related to C-N-P cycling from 17 locations spanning 30 year succession period after high-severity forest fires Greater Khingan Mountains (Inner Mongolia-China). We found that bacteria proliferated dominated competition with fungi by encoding recalcitrant C decomposition, N fixation, inorganic during postfire early succession. Wildfire prominently decoupled cycling, particularly organic-inorganic turnover. However, over period, these recoupled both organic mineral horizons. Notably, decoupling recovered faster than imbalance. This strong resilience microbiome will aid recovery ecosystem stability increased intensity wildfires projected forests China.

Язык: Английский

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Fire effects on soil carbon cycling pools in forest ecosystems: A global meta-analysis

The Science of The Total Environment, Год журнала: 2023, Номер 895, С. 165001 - 165001

Опубликована: Июнь 22, 2023

Changes in soil carbon (C) pools driven by fire forest ecosystems remain equivocal, especially at a global scale. In this study we analyzed data from 232 studies consisting of 1702 observations to investigate whether ecosystem type, climate zone, stand age, depth, slope, elevation, and the time since influence regime (fire season, intensity). Additionally, explored potential mechanisms relationships between multiple response variables using linear regression random models. On aggregate, fires significantly increased mean effect sizes several key cycling components-including microbial biomass (MBC), dissolved organic (DOC), total (TC), pyrogenic (PyC), matter (SOM), (SOC) 0.77, 0.89, 0.87, 1.22, 0.97 0.93, respectively, compared unburned forests ecosystems. However, effects on C vary widely environmental factors duration, are mediated such as tree species, layer. A correlation analysis displayed MBC DOC were negatively correlated with elevation. Fire floor mineral indicated PyC. SOC TC coniferous species most sensitive fires, thereby altering important feedback fire-vegetatale-climate system. Interestingly, latitude has stronger than annual precipitation or indicating that variations play significant role regulating amount Overall, results illustrated geographic variation underscores need for region-specific management plans, help us understand responses ecosystems, facilitate decision-making management.

Язык: Английский

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A global synthesis and conceptualization of the magnitude and duration of soil carbon losses in response to forest disturbances

Global Ecology and Biogeography, Год журнала: 2023, Номер 33(1), С. 141 - 150

Опубликована: Окт. 24, 2023

Forest disturbances are increasing around the globe due to changes in climate and management, deteriorating forests' carbon sink strength. Estimates of global forest budgets account for losses plant biomass but often neglect effects on soil organic (SOC). Here, we aimed quantify conceptualize SOC response different disturbance agents a scale.

Язык: Английский

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Terrestrial carbon dynamics in an era of increasing wildfire

Nature Climate Change, Год журнала: 2023, Номер 13(12), С. 1306 - 1316

Опубликована: Дек. 1, 2023

Язык: Английский

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Fire effects on soil CH4 and N2O fluxes across terrestrial ecosystems

The Science of The Total Environment, Год журнала: 2024, Номер 948, С. 174708 - 174708

Опубликована: Июль 18, 2024

Язык: Английский

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Forest fire and aspects showed no significant effects on most mineral soil properties of black pine forests

CATENA, Год журнала: 2025, Номер 250, С. 108801 - 108801

Опубликована: Фев. 6, 2025

Язык: Английский

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Forest Wildfire Increases the Seasonal Allocation of Soil Labile Carbon Fractions Due to the Transition from Microbial K- to r-Strategists

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Promoting the formation and accumulation of soil carbon (C) is one natural solutions to address climate change, but frequent wildfires increase its uncertainty challenge. This two-year study deciphered driving pathways seasonal vertical patterns in a C pool following wildfire from microbial perspective. Results showed that total organic concentration stock postfire decreased by 29.9 17.5% on average compared with unburned control, respectively, whereas allocations labile increased 25.1-45.7%. Fire-induced alterations fractions were complicated due their significant seasonality respective sensitivities. Nonetheless, we emphasized life-history traits decisive mediators variations positive linkages existed between r-selected communities. Fire stimulated lower bacterial fungal copiotroph/oligotroph ratios higher ribosomal ribonucleic acid operon copy number, shifting microbes K- r-strategists. From integrated management indices, fire can be concluded reduce stability accelerate cycling, whether recaptured prevalence K-strategist over time will modify processes remains unknown. provided stepping stone for future efforts accurate predictions reasonable management.

Язык: Английский

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Impacts of fire on soil respiration and its components: A global meta-analysis

Agricultural and Forest Meteorology, Год журнала: 2023, Номер 336, С. 109496 - 109496

Опубликована: Май 5, 2023

Язык: Английский

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