Relative contributions of soil, foliar, and woody tissue respiration to total ecosystem respiration in four pine forests of different ages

Khomik, M; Arain, M; Brodeur, J; Peichl, M; Restrepo Coupe, N; McLaren, J

Relative contributions of soil, foliar, and woody tissue respiration to total ecosystem respiration in four pine forests of different ages

Khomik, M Arain, M Brodeur, J Peichl, M Restrepo Coupe, N McLaren, J

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Publisher:: Amer Geophysical Union
Publication Type:: Journal Article
Citation:: Khomik Myroslava et al. 2010, 'Relative contributions of soil, foliar, and woody tissue respiration to total ecosystem respiration in four pine forests of different ages', Amer Geophysical Union, vol. 115, no. 1, pp. G03024-1-G03024-17.
Issue Date:: 2010

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Field	Value	Language
dc.contributor.author	Khomik, M	en_US
dc.contributor.author	Arain, M	en_US
dc.contributor.author	Brodeur, J	en_US
dc.contributor.author	Peichl, M	en_US
dc.contributor.author	Restrepo Coupe, N	en_US
dc.contributor.author	McLaren, J	en_US
dc.date.accessioned	2012-02-02T05:45:50Z
dc.date.available	2012-02-02T05:45:50Z
dc.date.issued	2010	en_US
dc.identifier	2010001530	en_US
dc.identifier.citation	Khomik Myroslava et al. 2010, 'Relative contributions of soil, foliar, and woody tissue respiration to total ecosystem respiration in four pine forests of different ages', Amer Geophysical Union, vol. 115, no. 1, pp. G03024-1-G03024-17.	en_US
dc.identifier.issn	2169-8961	en_US
dc.identifier.other	C1UNSUBMIT	en_US
dc.identifier.uri	http://hdl.handle.net/10453/14682
dc.description.abstract	Carbon dioxide (CO2) emissions from soil, foliage, and live woody tissue were measured throughout the year in afforested, white pine (Pinus strobus L.) stands (67, 32, 17, and 4 years old as of 2006), growing in a northern temperate climate. The data were used to estimate annual ecosystem respiration (Re) and its component fluxes, including soil, foliar, and woody tissue respiration; to investigate major environmental factors causing intersite and temporal variability in the observed fluxes; and to compare chamber-based Re estimates with eddy covariance-based estimates. While temperature was the dominant driving factor of temporal variability in component fluxes, intersite variability in CO2 emissions was attributed to differences in stand physiological characteristics, such as the presence of the LFH soil horizon, its carbon-to-nitrogen ratio, and the amount of canopy cover. Additional factors that contributed to flux variability included the frequency of precipitation events, vapor pressure deficit and stem diameter, depending on the component considered. Estimated annual chamber-based totals of Re across the four stands were 1526 ? 137, 1278 ? 137, 1985 ? 293, and 773 ? 46 g C m-2 yr-1 for the 67-, 32-, 17-, and 4-year-old stands, respectively. Soil respiration dominated emissions at the 4-year-old stand, while foliar respiration dominated emissions at the 17-year-old stand.	en_US
dc.publisher	Amer Geophysical Union	en_US
dc.relation.ispartof	Verified OK	en_US
dc.relation.ispartof	Journal of Geophysical Research: Biogeosciences	en_US
dc.relation.isbasedon	http://dx.doi.org/10.1029/2009JG001089
dc.subject.classification	Physical Geography and Environmental Geoscience	en_US
dc.title	Relative contributions of soil, foliar, and woody tissue respiration to total ecosystem respiration in four pine forests of different ages	en_US
dc.type	Journal article
utslib.citation.volume	115	en_US
utslib.citation.number	1	en_US
utslib.location	Washington DC, USA	en_US
utslib.citation.startpage	G03024-1	en_US
utslib.citation.endpage	G03024-17	en_US
utslib.identifier.org	SCI.Faculty of Science	en_US
utslib.for	060200	en_US
utslib.percentage	100	en_US
utslib.copyright.status	open_access

Abstract:

Carbon dioxide (CO2) emissions from soil, foliage, and live woody tissue were measured throughout the year in afforested, white pine (Pinus strobus L.) stands (67, 32, 17, and 4 years old as of 2006), growing in a northern temperate climate. The data were used to estimate annual ecosystem respiration (Re) and its component fluxes, including soil, foliar, and woody tissue respiration; to investigate major environmental factors causing intersite and temporal variability in the observed fluxes; and to compare chamber-based Re estimates with eddy covariance-based estimates. While temperature was the dominant driving factor of temporal variability in component fluxes, intersite variability in CO2 emissions was attributed to differences in stand physiological characteristics, such as the presence of the LFH soil horizon, its carbon-to-nitrogen ratio, and the amount of canopy cover. Additional factors that contributed to flux variability included the frequency of precipitation events, vapor pressure deficit and stem diameter, depending on the component considered. Estimated annual chamber-based totals of Re across the four stands were 1526 ? 137, 1278 ? 137, 1985 ? 293, and 773 ? 46 g C m-2 yr-1 for the 67-, 32-, 17-, and 4-year-old stands, respectively. Soil respiration dominated emissions at the 4-year-old stand, while foliar respiration dominated emissions at the 17-year-old stand.

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http://hdl.handle.net/10453/14682