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Forest Floor Composition in Aspen- and Spruce-Dominated Stands of the Boreal Mixedwood Forest

K. D. Hannama,*, S. A. Quideaua, S.-W. Ohb, B. E. Kishchukc and R. E. Wasylishenb

a Dep. of Renewable Resources, 442 Earth Sciences Bldg., Univ. of Alberta, Edmonton, AB Canada T6G 2E3
b Dep. of Chemistry, E344 Gunning/Lemieux Chemistry Centre, Univ. of Alberta, Edmonton, AB Canada T6G 2G2
c Natural Resources Canada, Canadian Forest Service, 5320-122 St., Edmonton, AB, Canada T6H 3S5




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  		Fig. 1. Representative cross-polarization magic-angle spinning (CPMAS) and dipolar-dephased (DD) 13C nuclear magnetic resonance (NMR) spectra of the Oe + Oa horizon of a white-spruce-dominated (SPRUCE) and a trembling-aspen-dominated (ASPEN) stand.

 


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  		Fig. 2. Distribution of C in the alkyl, O-alkyl, aromatic, and carbonyl regions of 13C NMR spectra obtained from the Oe + Oa horizon of white-spruce-dominated (SPRUCE) and trembling-aspen-dominated (ASPEN) stands. Error bars indicate one standard deviation (n = 3). Different letters indicate significance at the 0.05 probability level.

 


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  		Fig. 3. Representative 13C NMR spectra of white spruce needle litter, trembling aspen leaf litter and step moss.

 




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