Canadian Forest Service Publications

Processing of13C glucose in mineral soil from aspen, spruce and novelecosystems in the Athabasca Oil Sands Region. 2013. Norris, C.E., Quideau, S.A., Macey, D.E. Applied Soil Ecology 71 (2013) 24-32.

Year: 2013

Issued by: Pacific Forestry Centre

Catalog ID: 35815

Language: English

Availability: PDF (download)

Available from the Journal's Web site.
DOI: 10.1016/j.apsoil.2013.05.004

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Abstract

Microbial composition is known, on similar soil types, to vary based on differing organic matter inputs,or stand composition. Fine-textured luvisolic soils, which dominate the upland boreal forests of West-ern Canada, support a canopy cover of aspen (Populus tremuloides Michx.), white spruce (Picea glauca(Moench) Voss) or a mixture of the two. These soils then reflect different belowground biogeochemical processing of organic matter. Novel, anthropogenic soils formed from a combination of peat litter and fine textured mineral soil, are now also a part of the landscape in the western boreal. This study set out to determine if a simple labeled compound (13C glucose) was processed differently by soils from the two dominant stand types (aspen and spruce) and from an anthropogenic (newly reclaimed) site. Results indicate that while all three soils rapidly incorporated and respired the labeled carbon, each maintained a distinct microbial community structure (as evidenced by phospholipid fatty acid analysis) throughout the 300 hour experiment. Therefore soils with different microbial communities from varied organic matter inputs decompose organic carbon by different processes, even in the case of simple labile compounds.