Consumption of atmospheric methane by tundra soils

  title={Consumption of atmospheric methane by tundra soils},
  author={Stephen Whalen and William S. Reeburgh},
EMISSION of methane from tundra soil contributes about 10% of the global atmospheric methane budget1. Moreover, tundra soils contain 15% of global soil carbon2, so the response of this large carbon reservoir to projected global warming3,4 could be important. Coupled biological models3–6 predict that a warmer climate will increase methane emission through increased rates of methanogenesis. Microbial oxidation of methane is, however, a possible control on emissions that has previously been… 

Characterization of Methanotrophic Bacterial Populations in Soils Showing Atmospheric Methane Uptake

In this study the soil methane-oxidizing population was characterized by both labelling soil microbiota with14CH4 and analyzing a total soil monooxygenase gene library, and an unknown group of bacteria belonging to the α subclass of the class Proteobacteria was present.

Significance of grasslands in emission and absorption of greenhouse gases.

Grasslands account for about 20% of the terrestrial C02 fluxes of the global carbon cycle. They have a similar share in global soil organic carbon. Grasslands are likely to contribute to a global

Methane and nitrous oxide fluxes in native, fertilized and cultivated grasslands

METHANE and nitrous oxide are long-lived, radiatively active trace gases that account for ∼20% of the total anticipated atmospheric warming1. The atmospheric concentrations of both gases have

The regulation of methane oxidation in soil.

  • R. Mancinelli
  • Environmental Science
    Annual review of microbiology
  • 1995
Obtaining a better understanding of the ecology of methanotrophs will help elucidate the mechanisms that regulate soil methane oxidation, and help identify the factors influencing the flux of methane into the atmosphere.

Methane consumption by montane soils: implications for positive and negative feedback with climatic change

We report here three years of field observations of methane uptake, averaging 1.2 mg CH4 m−2 d−1 in montane meadow soils. Surface soil moisture influenced diffusion of substrate while in deeper soil,

Consumption of atmospheric methane by soils: A process‐based model

A process‐based model for the consumption of atmospheric methane (CH4) by soils was developed to identify the most important factors affecting uptake rates and to determine whether the current

Methane uptake by unflooded paddy soils:The influence of soil temperature and atmospheric methane concentration

Abstract Methane (CH4) is one of the most abundant organic gases in the atmosphere. Recently the importance of CH4 as a greenhouse gas has been recognized and studies have been carried out to assess

Methane Production and Oxidation in Soils and Sediments

Methane is the major end-product of anaerobic organic matter degradation in the biosphere. Its importance as a radiatively active trace gas in the atmosphere, increasing at about 1% y-1, has focussed

Mechanistic Analysis of Ammonium Inhibition of Atmospheric Methane Consumption in Forest Soils

Nitrite, the end product of methanotrophic ammonia oxidation, was a more effective inhibitor of methane consumption than ammonium, and factors that stimulated ammonium oxidation in soil enhanced ammonium inhibition of methane oxidation, probably as a result of enhanced nitrite production.

The processes of methane production and oxidation in the soils of the Russian Arctic tundra

The rates of methane production and oxidation in tundra soils of various types were studied by the radioisotope method at 5 and 15°C, and different types of methanotrophic bacteria were shown to be responsible for methane oxidation under these conditions.



Impact of a global warming on biospheric sources of methane and its climatic consequences

Most of atmospheric methane originates by bacterial processes in anaerobic environments withinthe soil which are found to become more productive with increases in ambient temperature. Awarming of

Influence of nitrogen fertilization on methane uptake in temperate forest soils

METHANE, a long-lived gas (8–10 years residence time), is important in the chemistry of the atmosphere and the Earth's radiation balance1–3. The tropospheric abundance of CH4 has been increasing by

Methane flux in the Great Dismal Swamp

Methane is an important component of the biogeochemical cycle of carbon with potentially critical roles in both atmospheric chemical and radiation transfer processes1–4. Limited evidence is available

Climate-induced feedbacks for the global cycles of methane and nitrous oxide

Recent experiments have shown that the concentrations of methane dipped to between 300 and 350 ppbv during the ice ages some 20,000 and 150,000 years ago. Our data, spanning more recent times, show a

Emissions of N2O, CH4 and CO2 from tropical forest soils

Emissions of nitrous oxide, methane, and carbon dioxide were measured at diverse locations in tropical forests of Brazil, Ecuador, and Puerto Rico, using a static open chamber technique. Mean fluxes

Methane consumption in aerated soils of the temperate zone

Quasi-continuous observations of the methane concentration in aerated soils of the temperate zone are presented. The flux of methane into the soil is calculated from the concentration gradient at the

Biological methanogenesis and the CO2 greenhouse effect

It is well established that plants tend to increase net photosynthesis under increased carbon dioxide. It is also well established that a large fraction of atmospheric methane is produced by

The dynamic greenhouse: Feedback processes that may influence future concentrations of atmospheric trace gases and climatic change

The sensitivity of the climate system to anthropogenic perturbations over the next century will be determined by a combination of feedbacks that amplify or damp the direct radiative effects of

Large-Scale Changes of Soil Wetness Induced by an Increase in Atmospheric Carbon Dioxide

Abstract The change in soil wetness in response to an increase of atmospheric concentration of carbon dioxide is investigated by two versions of a climate model which consists of a general

A methane flux time series for tundra environments

Seasonal measurements of net methane flux were made at permanent sites representing important components of arctic tundra. The sites include Eriophorum tussocks, intertussock depressions,