Soil respiration and CH4 consumption covary on the plot scale

Maier, Martin; Cordes, Malte; Osterholt, Laurin

doi:10.1016/j.geoderma.2020.114702

Cited by 7 publications

(5 citation statements)

References 38 publications

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“…The close link between CH 4 uptake and CO 2 respiration observed here and noted earlier in temperate forests 35 , 36 indicates that input of labile C, such as methanol or formaldehyde 24 , 37 , to the rhizosphere may be an important mechanism promoting methanotrophic activity in tundra. This ‘rhizodeposition’—a process during which plants allocate assimilated C to soil via living roots 38 —promotes soil organic matter decomposition 31 , 39 , 40 and nutrient mobilization and availability 38 , 41 .…”

Section: Diel Pattern Of Tundra Methane Uptakesupporting

confidence: 80%

Arctic soil methane sink increases with drier conditions and higher ecosystem respiration

Voigt,

Virkkala,

Hould Gosselin

et al. 2023

Nat. Clim. Chang.

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Arctic wetlands are known methane (CH4) emitters but recent studies suggest that the Arctic CH4 sink strength may be underestimated. Here we explore the capacity of well-drained Arctic soils to consume atmospheric CH4 using >40,000 hourly flux observations and spatially distributed flux measurements from 4 sites and 14 surface types. While consumption of atmospheric CH4 occurred at all sites at rates of 0.092 ± 0.011 mgCH4 m−2 h−1 (mean ± s.e.), CH4 uptake displayed distinct diel and seasonal patterns reflecting ecosystem respiration. Combining in situ flux data with laboratory investigations and a machine learning approach, we find biotic drivers to be highly important. Soil moisture outweighed temperature as an abiotic control and higher CH4 uptake was linked to increased availability of labile carbon. Our findings imply that soil drying and enhanced nutrient supply will promote CH4 uptake by Arctic soils, providing a negative feedback to global climate change.

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Section: Diel Pattern Of Tundra Methane Uptakesupporting

confidence: 80%

Arctic soil methane sink increases with drier conditions and higher ecosystem respiration

Voigt,

Virkkala,

Hould Gosselin

et al. 2023

Nat. Clim. Chang.

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“…Soil-atmosphere fluxes of CH 4 showed more variability than soil CH 4 concentrations, yet obvious seasonal cycles as observed with CO 2 and O 2 fluxes were not observed. Soil CH 4 consumption ranged between 0.001 and 0.003 µmol m −2 s −1 , which is in the range of CH 4 consumption rates observed in the region [41,72]. The average yearly consumption of 8.08 kg CH 4 ha -1 yr −1 corresponds to a high value (top 25%) compared to temperate forest soils worldwide [18].…”

Section: Relationship Of O2 and Co2 Fluxesmentioning

confidence: 75%

“…Local plot scale variability of soil respiration can be substantial [39] even at apparently homogenous sites [40]. Soil respiration seems to co-vary with CH 4 consumption on the plot scale [41,42] and also within similar landscapes [43]. Soil gas profiles usually reflect the ongoing processes of production and consumption of gases in a soil [44] and can be very different between sites.…”

Section: Why Soil Gases?mentioning

confidence: 99%

Long Term Soil Gas Monitoring as Tool to Understand Soil Processes

et al. 2020

Self Cite

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Soils provide many functions as they represent a habitat for flora and fauna, supply water, nutrient, and anchorage for plant growth and more. They can also be considered as large bioreactors in which many processes occur that involve the consumption and production of different gas species. Soils can be a source and sink for greenhouse gases. During the last decades this topic attracted special attention. Most studies on soil-atmosphere gas fluxes used chamber methods or micro-meteorological methods. Soil gas fluxes can also be calculated from vertical soil gas profiles which can provide additional insights into the underlying processes. We present a design for sampling and measuring soil gas concentration profiles that was developed to facilitate long term monitoring. Long term monitoring requires minimization of the impact of repeated measurements on the plot and also minimization of the routine workload while the quality of the measurement needs to be maintained continuously high. We used permanently installed gas wells that allowed passive gas sampling at different depths. Soil gas monitoring set ups were installed on 13 plots at 6 forest sites in South West Germany between 1998 and 2010. Until now, soil gas was sampled monthly and analysed for CO2, N2O, CH4, O2, N2, Ar, and C2H4 using gas chromatography. We present typical time series and profiles of soil gas concentrations and fluxes of a selected site as an example. We discuss the effect of different calculation approaches and conclude that flux estimates of O2, CO2 and CH4 can be considered as highly reliable, whereas N2O flux estimates include a higher uncertainty. We point out the potential of the data and suggest ideas for future research questions for which soil gas monitoring would provide the ideal data basis. Combining and linking the soil gas data with additional environmental data promises new insights and understanding of soil processes.

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“…The effect size of CH 4 had significantly positive correlation ( p < .05) with silt content in soil after the converted LUC as Figure 5b; Table S5 showed. Because more active methanotrophic microbial population in silt than that in sand made higher CH 4 consumption at a given soil gas diffusivity, soil with higher silt content was easier to become the better habitat for microbial population to decompose and release CH 4 (Maier et al, 2021). MBC was the representation of biologically active organic fraction in soil and was able to embody short‐term fluctuations of soil environment (Liu, Yang, et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Responses of soil greenhouse gas emissions to land use conversion and reversion—A global meta‐analysis

Feng

Wang

Wan

et al. 2022

Global Change Biology

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Exploring the responses of greenhouse gas (GHG) emissions to land use conversion or reversion is significant for taking effective land use measures to alleviate global warming. A global meta-analysis was conducted to analyze the responses of carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) emissions to land use conversion or reversion, and determine their temporal evolution, driving factors, and poten-

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Soil respiration and CH4 consumption covary on the plot scale

Cited by 7 publications

References 38 publications

Arctic soil methane sink increases with drier conditions and higher ecosystem respiration

Arctic soil methane sink increases with drier conditions and higher ecosystem respiration

Long Term Soil Gas Monitoring as Tool to Understand Soil Processes

Responses of soil greenhouse gas emissions to land use conversion and reversion—A global meta‐analysis

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