Minor Effects of Warming on Soil Microbial Diversity, Richness and Community Structure

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

Published: March 1, 2025

ABSTRACT Climate warming has caused widespread global concern. However, how affects soil microbial diversity, richness, and community structure on a scale remains poorly understood. Here we conduct meta‐analysis of 945 observations from 100 publications by collecting relevant data. The results show that field experiments significantly modify temperature (+1.8°C), water content (−3.2%), pH (−0.04). does not alter the bacteria fungi. Warming‐induced changes in variables (i.e., ΔSoil content, ΔpH), ΔTemperature experimental duration are important factors influencing responses to warming. In addition, bacterial α‐diversity (Shannon index) decreases (−3.4%) when is 3–6 years, β‐diversity increases (35.2%) exceeds 6 years. Meta‐regression analysis reveals positive correlation between change Shannon index ΔpH. Moreover, produces more pronounced effects fungal sites with moderate mean annual (MAT, 0°C–10°C) than higher (> 10°C) or lower (< 0°C) MAT. Overall, this study provides perspective response microorganisms climate improves our knowledge

Language: Английский

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Drought may exacerbate dryland soil inorganic carbon loss under warming climate conditions

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

Published: Jan. 19, 2024

Abstract Low moisture conditions result in substantially more soil inorganic carbon (SIC) than organic (SOC) drylands. However, whether and how changes affect the temperature response of SIC drylands are poorly understood. Here, we report that sensitivity dissolution increases but SOC decomposition decreases with increasing natural aridity from 30 dryland sites along a 4,500 km gradient northern China. To directly test effects alone, control experiment also revealed opposite on sensitivities SOC. Moreover, found was primarily regulated by pH base cations, whereas mainly physicochemical protection gradient. Given overall warming world, our findings highlight drought may exacerbate loss under warming.

Language: Английский

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Lithological Controls on Soil Aggregates and Minerals Regulate Microbial Carbon Use Efficiency and Necromass Stability

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 14, 2024

Microbial carbon (C) use efficiency (CUE) drives soil C formation, while physical-chemical protection stabilizes subsequent microbial necromass, both shaped by aggregates and minerals. Soils inherit many properties from the parent material, yet influence of lithology associated geochemistry on CUE necromass stabilization remains unknow. Here, we quantified in well-aggregated bulk soils crushed aggregates, as well mineral-associated organic matter fraction, originating carbonate-containing (karst) carbonate-free (clastic rock, nonkarst) materials along a broad climatic gradient. We found that aggregate crushing significantly increased karst nonkarst soils. Additionally, compared to soils, calcium-rich macroaggregate stability decreased ratio oligotrophic copiotrophic taxa, leading reduction CUE. Moreover, was negatively with iron (hydr)oxides attributed greater abundance higher pH. Despite negative effects aggregation minerals CUE, particularly these concurrently showed through organo-mineral associations Consequently, (i) bedrock mediates stability; (ii) balancing minerals' dual roles diminishing enhancing is vital for optimizing preservation.

Language: Английский

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Dynamics of biogeomorphology and CO2 sequestration in Jiangsu’s coastal salt marshes in East China following Spartina alterniflora invasion during 2011 2022

Regional Studies in Marine Science, Journal Year: 2025, Volume and Issue: unknown, P. 104052 - 104052

Published: Jan. 1, 2025

Language: Английский

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Thermal Compensatory Response of Soil Heterotrophic Respiration Following Wildfire

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

Frequent wildfires pose a serious threat to carbon (C) dynamics of forest ecosystems under warming climate. Yet, how alter the temperature sensitivity (Q10) soil heterotrophic respiration (Rh) as critical parameter determining C efflux from burned landscapes remains unknown. We conducted field survey and two confirmatory experiments in fire-prone regions China at <1, 3, 6, 12 months after (n = 160 samples). found that wildfire generally reduced Q10 for organic mineral horizons within first year mainly due substrate depletion, which was confirmed by uniform inoculation experiment. Mineral protection matter horizon rich iron/aluminum (hydr)oxides near-neutral pH postfire soils further suppressed Q10. Decreased persisted even removing limitation, reflecting dominance thermally adapted, r-strategist microbial community soils. Moreover, fire-induced low quality increased Q10, supported quality-temperature hypothesis, but C-limited condition restricted this stimulatory effect. This study illustrates thermal compensatory response Rh will help maintain stocks world.

Language: Английский

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Legacies of temperature fluctuations promote stability in marine biofilm communities

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

Published: March 11, 2025

Abstract The increasing frequency and intensity of extreme climate events are driving significant biodiversity shifts across ecosystems. Yet, the extent to which these legacies will shape response ecosystems future perturbations remains poorly understood. Here, we tracked taxon trait dynamics rocky intertidal biofilm communities under contrasting regimes warming (fixed vs. fluctuating) assessed how they influenced stability dimensions in temperature extremes. Fixed enhanced resistance by promoting functional redundancy stress-tolerance traits. In contrast, fluctuating boosted recovery rate through selection fast-growing taxa at expense redundancy. This intensified a trade-off between stress tolerance growth further limiting ability cope with Anticipating challenges posed events, our findings offer forward-looking perspective on microbial face ongoing climatic change.

Language: Английский

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Quantifying thresholds of key drivers for ecosystem health in large-scale river basins: A case study of the upper and middle Yellow River

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 383, P. 125480 - 125480

Published: April 24, 2025

Language: Английский

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The changes in soil organic carbon stock and quality across a subalpine forest successional series

Forest Ecosystems, Journal Year: 2024, Volume and Issue: 11, P. 100203 - 100203

Published: Jan. 1, 2024

Soil organic carbon (SOC) affects the function of terrestrial ecosystem and plays a vital role in global cycle. Yet, large uncertainty still existed regarding changes SOC stock quality with forest succession. Here, at 1 m soil profile were investigated across subalpine series, including shrub, deciduous broad-leaved forest, broadleaf-conifer mixed middle-age coniferous mature which located southeast Tibetan Plateau. The results showed that ranged from 9.8 to 29.9 kg·m–2, exhibited hump-shaped response pattern successional series. highest lowest was observed shrub respectively. had no significant relationships temperature litter stock, but positively correlated wood debris stock. Meanwhile, average percentages polysaccharides, lignins, aromatics aliphatics based on FTIR spectroscopy 79.89%, 0.94%, 18.87% 0.29%, Furthermore, percentage polysaccharides an increasing series except for sudden decreasing while proportions forest. Consequently, humification indices (HIs) compared other four stages, means worse than stages. In addition, recalcitrant fractions HIs decreased depth, pattern. These findings demonstrate higher high proportion (66% depth 20–100 cm) better (lower HIs) indicate deep have tremendous potential store needs more attention under change.

Language: Английский

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Direct Evidence for Microbial Regulation of the Temperature Sensitivity of Soil Carbon Decomposition

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(10)

Published: Oct. 1, 2024

Soil physicochemical protection, substrates, and microorganisms are thought to modulate the temperature sensitivity of soil carbon decomposition (Q

Language: Английский

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Roles of ecological and hydrological processes in the variability of carbon fluxes in a salt marsh of the Yangtze Estuary: Model simulations vs. measurements

Agricultural and Forest Meteorology, Journal Year: 2024, Volume and Issue: 362, P. 110344 - 110344

Published: Dec. 3, 2024

Language: Английский

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