Baseline-dependent responses of soil organic carbon dynamics to climate and land disturbances

Applied and Environmental Soil Science
By:  and 



Terrestrial carbon (C) sequestration through optimizing land use and management is widely considered a realistic option to mitigate the global greenhouse effect. But how the responses of individual ecosystems to changes in land use and management are related to baseline soil organic C (SOC) levels still needs to be evaluated at various scales. In this study, we modeled SOC dynamics within both natural and managed ecosystems in North Dakota of the United States and found that the average SOC stock in the top 20 cm depth of soil lost at a rate of 450 kg C ha−1 yr−1 in cropland and 110 kg C ha−1 yr−1 in grassland between 1971 and 1998. Since 1998, the study area had become a SOC sink at a rate of 44 kg C ha−1 yr−1. The annual rate of SOC change in all types of lands substantially depends on the magnitude of initial SOC contents, but such dependency varies more with climatic variables within natural ecosystems and with management practices within managed ecosystems. Additionally, soils with high baseline SOC stocks tend to be C sources following any land surface disturbances, whereas soils having low baseline C contents likely become C sinks following conservation management.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Baseline-dependent responses of soil organic carbon dynamics to climate and land disturbances
Series title Applied and Environmental Soil Science
DOI 10.1155/2013/206758
Volume 2013
Year Published 2013
Language English
Publisher Hindawi
Contributing office(s) Earth Resources Observation and Science (EROS) Center
Description Article ID 206758; 7 p.
First page 1
Last page 7
Google Analytic Metrics Metrics page
Additional metadata about this publication, not found in other parts of the page is in this table