Effects of warming on N2O fluxes in a boreal peatland of Permafrost region, Northeast China

Cui, Qian; Song, Changchun; Wang, Xianwei; Shi, Fang; Yu, Xueyang; Tan, Wenwen

doi:10.1016/j.scitotenv.2017.10.246

Cited by 65 publications

(53 citation statements)

References 69 publications

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“…It should be noted that the effect sizes of increased temperature on N 2 O emissions and the relationships with changes in soil temperature and treatment duration varied largely with different biomes and warming methods (Table ; Figures a and a,b), consistent with a previous review suggesting that increased temperature had mixed effects on N 2 O emission (Dijkstra et al, ). Shrublands showed the strongest response to experimental increased temperature among all the biomes and the positive responses to rise in soil temperature were mainly recorded in a 3‐year study conducted in a permafrost region, Northeast China (Cui et al, ). However, for extensively investigated grassland and forest ecosystems, we did not find any significant relationships between the effect size of increased temperature on N 2 O emission and changes in soil temperature or warming duration.…”

Section: Discussionmentioning

confidence: 99%

“…Taken individually, past studies of N 2 O flux response to climate change show a wide variety of responses such as the positive (Cui et al, ), neutral (Li et al, ) and negative effects (Hu et al, ) on N 2 O emission under experimental warming. Possible reasons for such variation include differences in biome type, climate manipulation characteristics, and experimental methods, all of which may impact the microbial communities mediating N 2 O emission.…”

Section: Introductionmentioning

confidence: 99%

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Terrestrial N₂O emissions and related functional genes under climate change: A global meta‐analysis

Zheng

Wang

et al. 2019

Global Change Biology

151

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Nitrous oxide (N2O) emissions from soil contribute to global warming and are in turn substantially affected by climate change. However, climate change impacts on N2O production across terrestrial ecosystems remain poorly understood. Here, we synthesized 46 published studies of N2O fluxes and relevant soil functional genes (SFGs, that is, archaeal amoA, bacterial amoA, nosZ, narG, nirK and nirS) to assess their responses to increased temperature, increased or decreased precipitation amounts, and prolonged drought (no change in total precipitation but increase in precipitation intervals) in terrestrial ecosystem (i.e. grasslands, forests, shrublands, tundra and croplands). Across the data set, temperature increased N2O emissions by 33%. However, the effects were highly variable across biomes, with strongest temperature responses in shrublands, variable responses in forests and negative responses in tundra. The warming methods employed also influenced the effects of temperature on N2O emissions (most effectively induced by open‐top chambers). Whole‐day or whole‐year warming treatment significantly enhanced N2O emissions, but daytime, nighttime or short‐season warming did not have significant effects. Regardless of biome, treatment method and season, increased precipitation promoted N2O emission by an average of 55%, while decreased precipitation suppressed N2O emission by 31%, predominantly driven by changes in soil moisture. The effect size of precipitation changes on nirS and nosZ showed a U‐shape relationship with soil moisture; further insight into biotic mechanisms underlying N2O emission response to climate change remain limited by data availability, underlying a need for studies that report SFG. Our findings indicate that climate change substantially affects N2O emission and highlights the urgent need to incorporate this strong feedback into most climate models for convincing projection of future climate change.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Terrestrial N₂O emissions and related functional genes under climate change: A global meta‐analysis

Zheng

Wang

et al. 2019

Global Change Biology

151

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“…Overall, warming in cold ecosystems has either no effect (e.g., Hu et al 2010, Lamb et al 2011 or a positive effect (e.g., Chang et al 2017, Shi et al 2012, Cui et al 2018) on N 2 O emissions. Overall, warming in cold ecosystems has either no effect (e.g., Hu et al 2010, Lamb et al 2011 or a positive effect (e.g., Chang et al 2017, Shi et al 2012, Cui et al 2018) on N 2 O emissions.…”

Section: Net Warming-caused Increases In N 2 O Emissions Across Cold mentioning

confidence: 99%

“…Overall, warming in cold ecosystems has either no effect (e.g., Hu et al 2010, Lamb et al 2011 or a positive effect (e.g., Chang et al 2017, Shi et al 2012, Cui et al 2018) on N 2 O emissions. In contrast, in a boreal peatland dominated by Betula fruticosa, a soil warming of 2°C for 1 yr increased N 2 O emissions by more than 300% (Cui et al 2018). For example, in an alpine meadow of the eastern Tibetan Plateau, a 1°C increase in soil temperature for one growing season increased N 2 O emissions by ca.…”

Section: Net Warming-caused Increases In N 2 O Emissions Across Cold mentioning

confidence: 99%

“…The effects of warming on N 2 O emissions vary widely between regions and conditions. Overall, warming in cold ecosystems has either no effect (e.g., Hu et al 2010, Lamb et al 2011 or a positive effect (e.g., Chang et al 2017, Shi et al 2012, Cui et al 2018) on N 2 O emissions. When positive, the magnitude of this effect varies widely across studies.…”

Section: Net Warming-caused Increases In N 2 O Emissions Across Cold mentioning

confidence: 99%

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Faster nitrogen cycling and more fungal and root biomass in cold ecosystems under experimental warming: a meta‐analysis

Salazar

Rousk

Jónsdóttir

et al. 2019

Ecology

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esson. 2020. Faster nitrogen cycling and more fungal and root biomass in cold ecosystems under experimental warming: a meta-analysis. Ecology 101(2):Abstract. Warming can alter the biogeochemistry and ecology of soils. These alterations can be particularly large in high northern latitude ecosystems, which are experiencing the most intense warming globally. In this meta-analysis, we investigated global trends in how experimental warming is altering the biogeochemistry of the most common limiting nutrient for biological processes in cold ecosystems of high northern latitudes (>50°): nitrogen (N). For comparison, we also analyzed cold ecosystems at intermediate and high southern latitudes. In addition, we examined N-relevant genes and enzymes, and the abundance of belowground organisms. Together, our findings suggest that warming in cold ecosystems increases N mineralization rates and N 2 O emissions and does not affect N fixation, at least not in a consistent way across biomes and conditions. Changes in belowground N fluxes caused by warming lead to an accumulation of N in the forms of dissolved organic and root N. These changes seem to be more closely linked to increases in enzyme activity that target relatively labile N sources, than to changes in the abundance of N-relevant genes (e.g., amoA and nosZ). Finally, our analysis suggests that warming in cold ecosystems leads to an increase in plant roots, fungi, and (likely in an indirect way) fungivores, and does not affect the abundance of archaea, bacteria, or bacterivores. In summary, our findings highlight global trends in the ways warming is altering the biogeochemistry and ecology of soils in cold ecosystems, and provide information that can be valuable for prediction of changes and for management of such ecosystems.

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How do water table drawdown, duration of drainage, and warming influence greenhouse gas emissions from drained peatlands of the Zoige Plateau?

et al. 2021

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Alpine peatlands on the Qinghai‐Tibet Plateau are an important soil carbon pool and are extremely sensitive to global change. Duration of drainage and water table drawdown accelerate peatland degradation because the soil changes from an anaerobic to aerobic environment, and climate warming exacerbates this shift. The objective of the present study was to evaluate the effects of drainage on microbial characteristics and greenhouse gas (GHG) emissions, as well as identify the factors mediating those effects. This study also analyzed whether warming increases the variability of GHG emissions. Watertable drawdown exerted greater influence on microbial communities than duration of drainage did. Watertable drawdown significantly increased the relative abundances of Proteobacteria, Acidobacteria, Actinobacteria, and Basidiomycota, and changes in soil microbiota correlated with differences in GHG emissions across three water‐table treatments. Longer drainage was associated with lower GHG emission; watertable drawdown decreased emissions of CO2 and CH4, but increased emission of N2O. In addition, high temperature increased CO2 emission by 75% and N2O emission by 42%, without significantly affecting CH4 emission. Structural equation modelling showed that microbes, especially prokaryotes (r = 0.79, p < 0.05 for all), were the primary factor affecting GHG emissions from drained peatlands. Overall, this study indicates that the watertable exerts a greater effect on GHG emissions than duration of drainage, and that warming increases variability of GHG emissions.

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Effects of warming on N2O fluxes in a boreal peatland of Permafrost region, Northeast China

Cited by 65 publications

References 69 publications

Terrestrial N₂O emissions and related functional genes under climate change: A global meta‐analysis

Terrestrial N₂O emissions and related functional genes under climate change: A global meta‐analysis

Faster nitrogen cycling and more fungal and root biomass in cold ecosystems under experimental warming: a meta‐analysis

How do water table drawdown, duration of drainage, and warming influence greenhouse gas emissions from drained peatlands of the Zoige Plateau?

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Effects of warming on N2O fluxes in a boreal peatland of Permafrost region, Northeast China

Cited by 65 publications

References 69 publications

Terrestrial N2O emissions and related functional genes under climate change: A global meta‐analysis

Terrestrial N2O emissions and related functional genes under climate change: A global meta‐analysis

Faster nitrogen cycling and more fungal and root biomass in cold ecosystems under experimental warming: a meta‐analysis

How do water table drawdown, duration of drainage, and warming influence greenhouse gas emissions from drained peatlands of the Zoige Plateau?

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Product

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Terrestrial N₂O emissions and related functional genes under climate change: A global meta‐analysis

Terrestrial N₂O emissions and related functional genes under climate change: A global meta‐analysis