Mineral soil carbon and nitrogen still low three decades following clearcut harvesting in a typical Acadian Forest stand

Publication date: February 2014
Source:Geoderma, Volumes 214–215
Author(s): D. Prest , L. Kellman , M.B. Lavigne

Intensive forest management practices can alter forest soil organic matter (SOM) storage (kgCha⁻¹) due to changes in the environmental variables that control SOM cycling and stability. Here we investigate whether SOM losses are observed three decades following clearcut harvesting in a temperate forest ecosystem that includes the deep mineral soil (to a depth of 50cm). We compared SOM stored as carbon (C) and nitrogen (N) in paired (35-year-old; 110-year-old reference) Acadian Forest sites that differed only in their time since harvest. We found lower mineral soil carbon (C) and nitrogen (N) storage (27% and 26% respectively), and lower C and N concentrations at the 35-year-old site compared with the 110-year-old reference site. Isotopic compositions of C and N through the soil profile did not provide insight into the dominant mechanisms driving SOM losses at the 35-year-old site in this study. This is the second study to document decreases in mineral soil C and N storage in a red spruce forest within the Acadian Forest Region three decades following clearcut harvesting.

Mineral soil carbon and nitrogen still low three decades following clearcut harvesting in a typical Acadian Forest stand

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