Trace gas emissions from a north Wales fen - Role of hydrochemistry and soil enzyme activity

H. Kang, C. Freeman, M. A. Lock

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31 Citations (Scopus)


Fluxes of methane and nitrous oxide from a wetland were compared to hydrochemistry (NO3- and SO4/2-) and soil enzyme activities (β- glucosidase) in an attempt to predict gas fluxes using chemical and enzymatic activities in north Wales, UK. In a one-year survey, the enzyme activities ranged from 0.028 to 0.065 μmol g-1 min-1, while NO3- and SO42- concentrations ranged between 0-0.78 and 5-200 mg L-1, respectively. Methane and nitrous oxide emissions varied between 0.32-240 and 0.28-5.48 mg m-1 da-1, respectively. The field survey was followed by laboratory- based manipulation experiments, from which pilot mathematical models were constructed, and related to the field data. The variation of methane emission was attributed to changes in SO4/2- concentration and temperature at the site. In contrast, NO3- concentration, water table height, and β- glucosidase activity were major controlling factors for nitrous oxide emission. The models explained more than 80 % of the variation observed in the field study.

Original languageEnglish
Pages (from-to)107-116
Number of pages10
JournalWater, Air, and Soil Pollution
Issue number1-2
Publication statusPublished - 1998 Jul

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Ecological Modelling
  • Water Science and Technology
  • Pollution


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