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Response of soil surface CO2 flux in a boreal forest to ecosystem warming

Authors :
Dustin R. Bronson
Myron Tanner
Stith T. Gower
Ingrid Van Herk
Sune Linder
Source :
Global Change Biology. 14:856-867
Publication Year :
2007
Publisher :
Wiley, 2007.

Abstract

Soil surface carbon dioxide (CO 2 ) flux (Rs) was measured for 2 years at the Boreal Soil and Air Warming Experiment site near Thompson, MB, Canada. The experimental design was a complete random block design that consisted of four replicate blocks, with each block containing a 15 m x 15 m control and heated plot. Black spruce [Picea mariana (Mill.) BSP] was the overstory species and Epilobium angustifolium was the dominant understory. Soil temperature was maintained (∼ 5 °C) above the control soil temperature using electric cables inside water filled polyethylene tubing for each heated plot. Air inside a 7.3-m-diameter chamber, centered in the soil warming plot, contained approximately nine black spruce trees was heated ∼ 5 °C above control ambient air temperature allowing for the testing of soil-only warming and soil + air warming. Soil surface CO 2 flux (Rs) was positively correlated (P

Details

ISSN :
13541013
Volume :
14
Database :
OpenAIRE
Journal :
Global Change Biology
Accession number :
edsair.doi...........2dd3044311eedab43cb2c62a5295630b
Full Text :
https://doi.org/10.1111/j.1365-2486.2007.01508.x