IDEAS home Printed from https://ideas.repec.org/a/eee/ecomod/v240y2012icp84-92.html
   My bibliography  Save this article

Estimating evolution of δ13CH4 during methanogenesis in the boreal peatland ecosystems based on stoichiometric chemical reactions, microbial dynamics and stable carbon isotope fractionation

Author

Listed:
  • Vavilin, V.A.

Abstract

A change in natural isotopic composition of products may be used to reveal metabolic pathways of substrate transformation by microbial community (Vavilin, 2012). In this study, data of δ13CH4 obtained during methanization of organic material from three boreal peatland ecosystems, previously measured and evaluated by Galand et al. (2010), was used to describe mathematically a system dynamics of peat transformation. In the system of differential equations, both stoichiometric chemical reactions and an equation for the 13C isotope accumulation in products including isotope fractionation and microbial dynamics were considered. The model confirm that acetoclastic and hydrogenotrophic methanogenesis occurred with high methane production rates during cellulose methanization in the mesotrophic fen (MES) while hydrogenotrophic methanogenesis happened without intermediate acetate production during non-canonical cellulose methanization in the nutrient-poor peat (OLI – oligotrophic fen, OMB – ombrotrophic peat). This was in agreement with Galand et al. (2010). The model showed that a value of δ13CH4 depended on acetoclastic and hydrogenotrophic methanogenesis rates and on coefficients of stable carbon isotopes fractionation. A strong kinetic fractionation factor (1.064–1.087) was used for hydrogenotrophic methanogenesis. The produced volumes of CH4 and CO2 were about 1:1 (MES) and 1:2 (OLI, OMB) which was in accordance with stoichiometric chemical reactions. Inhibition of methanogenesis by methyl fluoride (CH3F) was described in the model assuming exponential decrease of methane production rate in time which was about 3.6 times higher for acetoclastic methanogenesis when compared to hydrogenotrophic methanogenesis. It was confirmed that CH3F resulted in a strong decrease of δ13CH4 in MES only.

Suggested Citation

  • Vavilin, V.A., 2012. "Estimating evolution of δ13CH4 during methanogenesis in the boreal peatland ecosystems based on stoichiometric chemical reactions, microbial dynamics and stable carbon isotope fractionation," Ecological Modelling, Elsevier, vol. 240(C), pages 84-92.
    • Handle: RePEc:eee:ecomod:v:240:y:2012:i:c:p:84-92
    DOI: 10.1016/j.ecolmodel.2012.04.023
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0304380012002074
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.ecolmodel.2012.04.023?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Vavilin, V.A., 2010. "Equation for isotope accumulation in products and biomass as a way to reveal the pathways in mesophilic methanol methanization by microbial community," Ecological Modelling, Elsevier, vol. 221(24), pages 2881-2886.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Vavilin, Vasily & Rytov, Sergey & Lokshina, Lyudmila, 2018. "Dynamic isotope equations for 13CH4 and 13CO2 describing methane formation with a focus on the effect of anaerobic respiration in sediments of some tropical lakes," Ecological Modelling, Elsevier, vol. 386(C), pages 59-70.
    2. Vavilin, Vasily & Rytov, Sergey & Conrad, Ralf, 2017. "Modelling methane formation in sediments of tropical lakes focusing on syntrophic acetate oxidation: Dynamic and static carbon isotope equations," Ecological Modelling, Elsevier, vol. 363(C), pages 81-95.
    3. Vavilin, V.A. & Rytov, S.V. & Lokshina, L.Y., 2014. "Non-linear dynamics of nitrogen isotopic signature based on biological kinetic model of uptake and assimilation of ammonium, nitrate and urea by a marine diatom," Ecological Modelling, Elsevier, vol. 279(C), pages 45-53.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.

      Corrections

      All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:ecomod:v:240:y:2012:i:c:p:84-92. See general information about how to correct material in RePEc.

      If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

      If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

      If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

      For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/ecological-modelling .

      Please note that corrections may take a couple of weeks to filter through the various RePEc services.

      IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.