Skip to Main Content
Methane uptake in urban forests and lawnsAuthor(s): Peter M. Groffman; Richard V. Pouyat
Source: Environmental Science & Technology. 43(14): 5229-5235.
Publication Series: Scientific Journal (JRNL)
Station: Washington Office
Download Publication (645.0 KB)
DescriptionThe largest natural biological sink for the radiatively active trace gas methane (CH4) is bacteria in soils that consume CH4 as an energy and carbon source. This sink has been shown to be sensitive to nitrogen (N) inputs and alterations of soil physical conditions. Given this sensitivity, conversion of native ecosystems to urban, suburban, and exurban managed lawns thus has potential to affect regional CH4 budgets. We measured CH4 fluxes monthly from four urban forest, four rural forest and four urban lawn plots in the Baltimore, MD, metropolitan area from 2001 to 2005. Our objectives were to evaluate the effects of urban atmospheric and land use change on CH4 uptake and the importance of these changes relative to other greenhouse forcings in the urban landscape. Rural forests had a high capacity for CH4 uptake (1.68 mg m-2 day-1). This capacity was reduced in urban forests (0.23 mg m-2 day-1) and almost completely eliminated in lawns. Possible mechanisms for these reductions include increases in atmospheric N deposition and CO2 levels, fertilization of lawns, and alteration of soil physical conditions that influence diffusion. Although conversion of native forests to lawns had dramatic effects on CH4 uptake, these effects do not appear to be significant to statewide greenhouse gas forcing.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationGroffman, Peter M.; Pouyat, Richard V. 2009. Methane uptake in urban forests and lawns. Environmental Science & Technology. 43(14): 5229-5235.
- Tropical forest soil microbial communities couple iron and carbon biogeochemistry
- Endophytic bacteria in cacti seeds can improve the development of cactus seedlings.
- Changes in microbial community structure following herbicide (glyphosate) additions to forest soils
XML: View XML