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Dinitrogen and nitrous oxide exchanges from an undrained monolith fen: short-term responses following nitrate addition

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Abstract
Gaseous nitrogen exchanges from undrained peat soils and the effect of external nitrate input are poorly understood. This paper reports net N-2, and N2O exchanges as well as the short-term responses to nitrate addition from contrasting tussock and hollow soil habitats in an undrained monolith fen ecosystem located in northeast Poland. Gaseous N exchange rates were quantified by means of a He substitution technique. The net N-2 production in hollows (2.53 mg N m(-2) hour(-1)) was significantly higher than in tussocks (1.04 mg N m(-2) hour(-1)). Hollows also constituted a marked N2O sink (-3.04 mu g N m(-2) hour(-1)), while tussocks were a source for atmospheric N2O (2.08 mu g N m(-2) hour(-1)). Following amendment by NO3-, at a rate similar to atmospheric NO3- deposition (wet + dry), hollows showed a drastic shift to net production of N2O but a non-significant increase in N-2 production. In tussocks only a minor increase of N-2 and N2O production was observed after NO3- addition. This study emphasizes the influence of physico-chemical conditions and biotic resource competition on the rates and responses of microbial denitrification in undrained fen ecosystems. Inferring a simple field-scale estimation of gaseous N emission suggests that undrained, monolith fen ecosystems constitute substantial sources of N-2 (1.79 mg N m(-2) hour(-1)) and considerable sinks for N2O (-0.96 mu g N m(-2) hour(-1)). These findings are of importance to further improve greenhouse gas budgeting and assess the impacts of global change on undrained fen ecosystems.
Keywords
WATER-TABLE, BOREAL PEATLANDS, DENITRIFICATION RATES, RESTORED PEATLAND, CLIMATE-CHANGE, N2O EMISSIONS, SOIL, MINERALIZATION, DYNAMICS, WETLANDS

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Chicago
Roobroeck, Dries, Klaus Butterbach-Bahl, N Brüggemann, and Pascal Boeckx. 2010. “Dinitrogen and Nitrous Oxide Exchanges from an Undrained Monolith Fen: Short-term Responses Following Nitrate Addition.” European Journal of Soil Science 61 (5): 662–670.
APA
Roobroeck, D., Butterbach-Bahl, K., Brüggemann, N., & Boeckx, P. (2010). Dinitrogen and nitrous oxide exchanges from an undrained monolith fen: short-term responses following nitrate addition. EUROPEAN JOURNAL OF SOIL SCIENCE, 61(5), 662–670.
Vancouver
1.
Roobroeck D, Butterbach-Bahl K, Brüggemann N, Boeckx P. Dinitrogen and nitrous oxide exchanges from an undrained monolith fen: short-term responses following nitrate addition. EUROPEAN JOURNAL OF SOIL SCIENCE. 2010;61(5):662–70.
MLA
Roobroeck, Dries, Klaus Butterbach-Bahl, N Brüggemann, et al. “Dinitrogen and Nitrous Oxide Exchanges from an Undrained Monolith Fen: Short-term Responses Following Nitrate Addition.” EUROPEAN JOURNAL OF SOIL SCIENCE 61.5 (2010): 662–670. Print.
@article{1252034,
  abstract     = {Gaseous nitrogen exchanges from undrained peat soils and the effect of external nitrate input are poorly understood. This paper reports net N-2, and N2O exchanges as well as the short-term responses to nitrate addition from contrasting tussock and hollow soil habitats in an undrained monolith fen ecosystem located in northeast Poland. Gaseous N exchange rates were quantified by means of a He substitution technique. The net N-2 production in hollows (2.53 mg N m(-2) hour(-1)) was significantly higher than in tussocks (1.04 mg N m(-2) hour(-1)). Hollows also constituted a marked N2O sink (-3.04 mu g N m(-2) hour(-1)), while tussocks were a source for atmospheric N2O (2.08 mu g N m(-2) hour(-1)). Following amendment by NO3-, at a rate similar to atmospheric NO3- deposition (wet + dry), hollows showed a drastic shift to net production of N2O but a non-significant increase in N-2 production. In tussocks only a minor increase of N-2 and N2O production was observed after NO3- addition. This study emphasizes the influence of physico-chemical conditions and biotic resource competition on the rates and responses of microbial denitrification in undrained fen ecosystems. Inferring a simple field-scale estimation of gaseous N emission suggests that undrained, monolith fen ecosystems constitute substantial sources of N-2 (1.79 mg N m(-2) hour(-1)) and considerable sinks for N2O (-0.96 mu g N m(-2) hour(-1)). These findings are of importance to further improve greenhouse gas budgeting and assess the impacts of global change on undrained fen ecosystems.},
  author       = {Roobroeck, Dries and Butterbach-Bahl, Klaus and Br{\"u}ggemann, N and Boeckx, Pascal},
  issn         = {1351-0754},
  journal      = {EUROPEAN JOURNAL OF SOIL SCIENCE},
  keyword      = {WATER-TABLE,BOREAL PEATLANDS,DENITRIFICATION RATES,RESTORED PEATLAND,CLIMATE-CHANGE,N2O EMISSIONS,SOIL,MINERALIZATION,DYNAMICS,WETLANDS},
  language     = {eng},
  number       = {5},
  pages        = {662--670},
  title        = {Dinitrogen and nitrous oxide exchanges from an undrained monolith fen: short-term responses following nitrate addition},
  url          = {http://dx.doi.org/10.1111/j.1365-2389.2010.01269.x},
  volume       = {61},
  year         = {2010},
}

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