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Can a Bog Drained for Forestry Be a Stronger Carbon Sink Than a Natural Bog Forest? : Volume 11, Issue 13 (02/07/2014)

By Hommeltenberg, J.

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Book Id: WPLBN0003989781
Format Type: PDF Article :
File Size: Pages 17
Reproduction Date: 2015

Title: Can a Bog Drained for Forestry Be a Stronger Carbon Sink Than a Natural Bog Forest? : Volume 11, Issue 13 (02/07/2014)  
Author: Hommeltenberg, J.
Volume: Vol. 11, Issue 13
Language: English
Subject: Science, Biogeosciences
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Description
Description: Karlsruhe Institute of Technology KIT, Institute of Meteorology and Climate Research IMK-IFU, Kreuzeckbahnstrasse 19, 82467 Garmisch-Partenkirchen Germany. This study compares the CO2 exchange of a natural bog forest, and of a bog drained for forestry in the pre-Alpine region of southern Germany. The sites are separated by only 10 km, they share the same soil formation history and are exposed to the same climate and weather conditions. In contrast, they differ in land use history: at the Schechenfilz site a natural bog-pine forest (Pinus mugo ssp. rotundata) grows on an undisturbed, about 5 m thick peat layer; at Mooseurach a planted spruce forest (Picea abies) grows on drained and degraded peat (3.4 m). The net ecosystem exchange of CO2 (NEE) at both sites has been investigated for 2 years (July 2010–June 2012), using the eddy covariance technique. Our results indicate that the drained, forested bog at Mooseurach is a much stronger carbon dioxide sink (−130 ± 31 and −300 ± 66 g C m−2 a−1 in the first and second year, respectively) than the natural bog forest at Schechenfilz (−53 ± 28 and −73 ± 38 g C m−2 a−1). The strong net CO2 uptake can be explained by the high gross primary productivity of the 44-year old spruces that over-compensates the two-times stronger ecosystem respiration at the drained site. The larger productivity of the spruces can be clearly attributed to the larger plant area index (PAI) of the spruce site. However, even though current flux measurements indicate strong CO2 uptake of the drained spruce forest, the site is a strong net CO2 source when the whole life-cycle since forest planting is considered. It is important to access this result in terms of the long-term biome balance. To do so, we used historical data to estimate the difference between carbon fixation by the spruces and the carbon loss from the peat due to drainage since forest planting. This rough estimate indicates a strong carbon release of +134 t C ha−1 within the last 44 years. Thus, the spruces would need to grow for another 100 years at about the current rate, to compensate the potential peat loss of the former years. In contrast, the natural bog-pine ecosystem has likely been a small but stable carbon sink for decades, which our results suggest is very robust regarding short-term changes of environmental factors.

Summary
Can a bog drained for forestry be a stronger carbon sink than a natural bog forest?

Excerpt
Alm, J., Saarnio, S., Nykanen, H., Silvola, J., and Martikainen, P. J.: Winter CO2, CH4 and N2O fluxes on some natural and drained boreal peatlands, Biogeochemistry, 44, 163–186, doi:10.1023/A:1006074606204, 1999a.; Alm, J., Schulman, L., Walden, J., Nykanen, H., Martikainen, P. J., and Silvola, J.: Carbon balance of a boreal bog during a year with an exceptionally dry summer, Biogeochemistry, 80, 161–174, doi:10.1890/0012-9658(1999)080[0161:CBOABB]2.0.CO;2, 1999b.; Armentano, T. V. and Menges, E. S.: Patterns of Change in the Carbon Balance of Organic Soil-Wetlands of the Temperate Zone, J. Ecol., 74, 755–774, doi:10.2307/2260396, 1986.; Arneth, A., Kurbatova, J., Kolle, O., Shibistova, O. B., Lloyd, J., Vygodskaya, N. N., and Schulze, E. D.: Comparative ecosystem-atmosphere exchange of energy and mass in a European Russian and a central Siberian bog II. Interseasonal and interannual variability of CO2 fluxes, Tellus B., 54, 514–530, doi:10.1034/j.1600-0889.2002.01349.x, 2002.; Aubinet, M., Feigenwinter, C., Heinesch, B., Laffineur, Q., Papale, D., Reichstein, M., Rinne, J., and van Gorsel, E.: Nighttime Flux Correction, in: Eddy Covariance A Practical Guide to Measurment and Data Analysis, edited by: Aubinet, M., Vesala, T., and Papale, D., Springer, 133–157, 2012.; Aurela, M., Riutta, T., Laurila, T., Tuovinen, J. P., Vesala, T., Tuittila, E. S., Rinne, J., Haapanala, S., and Laine, J.: CO2 exchange of a sedge fen in southern Finland – The impact of a drought period, Tellus B, 59, 826–837, doi:10.1111/j.1600-0889.2007.00309.x, 2007.; Aurela, M., Lohila, A., Tuovinen, J. P., Hatakka, J., Riutta, T., and Laurila, T.: Carbon dioxide exchange on a northern boreal fen, Boreal. Environ. Res., 14, 699–710, 2009.; Baldocchi, D. D., Hicks, B. B., and Meyers, T. P.: Measuring Biosphere-Atmosphere Exchanges of Biologically Related Gases with Micrometeorological Methods, Ecology, 69, 1331–1340, doi:10.2307/1941631, 1988.; Braekke, F. H.: Nutrient Relationships in Forest Stands – Effects of Drainage and Fertilization on Surface Peat Layers, Forest Ecol. Manage., 21, 269–284, doi:10.1016/0378-1127(87)90048-X, 1987.; Braekke, F. H. and Finer, L.: Fertilization Effects on Surface Peat of Pine Bogs, Scand. J. Forest Res., 6, 433–449, doi:10.1080/02827589109382681, 1991.; Bubier, J., Crill, P., Mosedale, A., Frolking, S. and Linder, E.: Peatland responses to varying interannual moisture conditions as measured by automatic CO2 chambers, Global Biogeochem. Cy., 17, 1066, doi:10.1029/2002GB001946, 2003a.; Bubier, J. L., Bhatia, G., Moore, T. R., Roulet, N. T., and Lafleur, P. M.: Spatial and temporal variability in growing-season net ecosystem carbon dioxide exchange at a large peatland in Ontario, Canada, Ecosystems, 6, 353–367, doi:10.1007/s10021-003-0125-0, 2003b.; Burba, G., Furtaw, M. D., McDermitt, D. K., and Eckles, R.: Combining the strengths of open-path and closed-path designs into a single CO2/H2O gas analyzer, American Geophysical Union Fall Meeting, San Francisco, California, USA, 14–18 December, 2009.; Burba, G. G., McDermitt, D. K., Anderson, D. J., Furtaw, M. D., and E

 

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