Next Article in Journal
The Relationship between Sap Flow Density and  Environmental Factors in the Yangtze River Delta  Region of China
Next Article in Special Issue
Climate Impacts on Soil Carbon Processes along an Elevation Gradient in the Tropical Luquillo Experimental Forest
Previous Article in Journal
Elevated Atmospheric CO2 and Warming Stimulates Growth and Nitrogen Fixation in a Common Forest Floor Cyanobacterium under Axenic Conditions
Previous Article in Special Issue
Erratum: Spatial Upscaling of Soil Respiration under a Complex Canopy Structure in an Old-Growth Deciduous Forest, Central Japan; Forests 2017, 8, 36
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessArticle
Forests 2017, 8(3), 75;

Partitioning Forest‐Floor Respiration into Source  Based Emissions in a Boreal Forested Bog: Responses  to Experimental Drought

Department of Geography, University of Calgary, Calgary, AB T2N 1N4, Canada
Department of Geography and Environmental Management, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Author to whom correspondence should be addressed.
Academic Editors: Robert Jandl and Mirco Rodeghiero
Received: 1 February 2017 / Accepted: 7 March 2017 / Published: 10 March 2017
(This article belongs to the Special Issue Forest Soil Respiration under Climate Changing)
Full-Text   |   PDF [4371 KB, uploaded 13 March 2017]   |  


Northern peatlands store globally significant amounts of soil carbon that could be released to the atmosphere under drier conditions induced by climate change. We measured forest floor respiration (RFF) at hummocks and hollows in a treed boreal bog in Alberta, Canada and partitioned the flux into aboveground forest floor autotrophic, belowground forest floor autotrophic, belowground tree respiration, and heterotrophic respiration using a series of clipping and trenching experiments. These fluxes were compared to those measured at sites within the same bog where water‐table (WT) was drawn down for 2 and 12 years. Experimental WT drawdown significantly increased RFF with greater increases at hummocks than hollows. Greater RFF was largely driven by increased autotrophic respiration driven by increased growth of trees and shrubs in response to drier conditions; heterotrophic respiration accounted for a declining proportion of RFF with time since drainage. Heterotrophic respiration was increased at hollows, suggesting that soil carbon may be lost from these sites in response to climate change induced drying. Overall, although WT drawdown increased RFF, the substantial contribution of autotrophic respiration to RFF suggests that peat carbon stocks are unlikely to be rapidly destabilized by drying conditions. View Full-Text
Keywords: forest  floor  respiration;  root  respiration;  autotrophic  respiration;  heterotrophic  respiration; disturbance; water table; drought; climate change; modeling; soil temperature forest  floor  respiration;  root  respiration;  autotrophic  respiration;  heterotrophic  respiration; disturbance; water table; drought; climate change; modeling; soil temperature

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Munir, T.M.; Khadka, B.; Xu, B.; Strack, M. Partitioning Forest‐Floor Respiration into Source  Based Emissions in a Boreal Forested Bog: Responses  to Experimental Drought. Forests 2017, 8, 75.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Forests EISSN 1999-4907 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top