Canadian Forest Service Publications

Influence of disturbance on soil C dynamics in Canadian boreal forests. 2002. Bhatti, J.S.; Apps, M.J. Pages 1054-1–1054-10 in 17th World Congress of Soil Science Symposium no. 45, August 14-21, 2002, Bangkok, Thailand. Ecomed Publishers, Landsberg, Germany.

Year: 2002

Available from: Pacific Forestry Centre

Catalog ID: 23765

Language: English

CFS Availability: PDF (download)

Abstract

In Canadian boreal forest ecosystems, estimates of carbon (C) in the forest floor and total soil were compared and the influence of disturbance was evaluated. The soil C estimates were based on data from: (a) analysis of pedon data from the national-scale soil profile database; (b) the Canadian Soil Organic Carbon Database (CSOCD), which uses expert estimation based on soil characteristics; and (c) model simulations with the Carbon Budget Model of the Canadian Forest Sector (CBM-CFS2). Estimates for soil C from the three approaches ranged from 1.3 to 5.3 kg C m-2 for the forest floor and from 7.8 to 19.2 kg C m-2 for the total soil column. Variations in litter input rates due to different type of disturbances cause most of the variation in the soil carbon pools. Changes in disturbance history, litter fall rate, site characteristics, and climatic factors alter the processes regulating both inputs and outputs of carbon to soil stocks. Thus, understanding the dynamics of C as determined by disturbances is essential for quantifying past changes in soil C stocks and for projecting their future change.

Date modified: