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dc.contributor.advisorBarr, Alanen_US
dc.contributor.advisorAnderson, Darwin W.en_US
dc.creatorTheede, Alison Deanneen_US
dc.date.accessioned2007-05-30T14:50:16Zen_US
dc.date.accessioned2013-01-04T04:34:14Z
dc.date.available2007-05-31T08:00:00Zen_US
dc.date.available2013-01-04T04:34:14Z
dc.date.created2007-05en_US
dc.date.issued2007-05-31en_US
dc.date.submittedMay 2007en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-05302007-145016en_US
dc.description.abstractThe boreal forest is one of the world’s largest forest biomes and comprises a major portion of the terrestrial carbon (C) sink. Quantifying the net C change in forest ecosystems is an important step in understanding and modeling the global C cycle. The goals of this project were: to estimate and compare the total change in ecosystem C over a 10-year period in two boreal forest stands using biometric and eddy-covariance approaches, and to evaluate the year-to-year changes in C uptake. This study utilized 10 years of eddy-covariance data and ecosys model data from the Old Aspen (OA) and Old Jack Pine (OJP) sites in central Saskatchewan, part of the Boreal Ecosystem Research and Monitoring Sites (BERMS). According to the eddy-covariance and C stock approaches, between 1994 and 2004 the net change in C storage at OA was 15.6 ± 4.0 and 18.2 ± 8.0 Mg C ha-1, respectively. At OJP, the 10-year net change in C storage from eddy-covariance was 5.8 ± 2.0 Mg C ha-1 in comparison to 6.9 ± 1.6 Mg C ha-1 from the carbon stock approach. While both sites were sinks of C between 1994 and 2004, the greatest increase in C occurred in different components - the forest floor at OA (14.6 Mg C ha-1) and in the living vegetation at OJP (8.0 Mg C ha-1). In 2004, total ecosystem C content was greater at OA (180.6 Mg C ha-1) than OJP (78.9 Mg C ha-1), with 50% (OA) and 39% (OJP) of the C in the detritus and mineral soil pools. During the 10-year period of eddy-covariance measurements, there was a positive correlation between both annual and growing season gross ecosystem photosynthesis (GEP) and live stem C biomass increment at OA, whereas no significant relationships were found at OJP. Stem C increment accounted for 30% of total net primary productivity (NPP) at both sites, and NPP/GEP ratios were 0.36 and 0.32 at OA and OJP, respectively. Overall, this study found good agreement between eddy-covariance and biometric estimates of ecosystem C change at OA and OJP between 1994 and 2004. Over that period at OA, eddy-covariance estimates of photosynthesis captured the inter-annual variability in C uptake based on the growth of tree rings.en_US
dc.language.isoen_USen_US
dc.subjecteddy-covarianceen_US
dc.subjectforest carbon balanceen_US
dc.subjectforest carbon storageen_US
dc.subjectnet ecosystem productivityen_US
dc.titleBiometric and eddy-covariance estimates of ecosystem carbon storage at two boreal forest stands in Saskatchewan : 1994-2004en_US
thesis.degree.departmentSoil Scienceen_US
thesis.degree.disciplineSoil Scienceen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M.Sc.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US


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