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  Spatial variability of nitrous oxide emissions in an unmanaged old-growth beech forest

Jungkunst, H. F., Bargsten, A., Timme, M., & Glatzel, S. (2012). Spatial variability of nitrous oxide emissions in an unmanaged old-growth beech forest. Journal of Plant Nutrition and Soil Science, 175(5), 739-749. doi:10.1002/jpln.201100412.

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 Creators:
Jungkunst, Hermann F., Author
Bargsten, Anika, Author
Timme, Marc1, Author           
Glatzel, Stephan, Author
Affiliations:
1Max Planck Research Group Network Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063295              

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Free keywords: old-growth forest; nitrous oxide; model; spatial variability; background emissions
 Abstract: Nitrous oxide (N2O) is a high-impact greenhouse gas. Due to the scarcity of unmanaged forests in Central Europe, its long-term natural background emission level is not entirely clear. We measured soil N2O emissions in an unmanaged, old-growth beech forest in the Hainich National Park, Germany, at 15 plots over a 1-year period. The average annual measured N2O flux rate was (0.49 ± 0.44) kg N ha–1 y–1. The N2O emissions showed background-emission patterns with two N2O peaks. A correlation analysis shows that the distance between plots (up to 380 m) does not control flux correlations. Comparison of measured data with annual N2O flux rates obtained from a standard model (Forest-DNDC) without site-specific recalibration reveals that the model overestimates the actual measured N2O flux rates mainly in spring. Temporal variability of measured N2O flux was better depicted by the model at plots with high soil organic C (SOC) content. Modeled N2O flux rates were increased during freezing only when SOC was > 0.06 kg C kg–1. The results indicate that the natural background of N2O emissions may be lower than assumed by most approaches.

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Language(s): eng - English
 Dates: 2012-10-17
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Degree: -

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Title: Journal of Plant Nutrition and Soil Science
  Alternative Title : J. Plant Nutr. Soil Sci.
Source Genre: Journal
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Pages: - Volume / Issue: 175 (5) Sequence Number: - Start / End Page: 739 - 749 Identifier: -