Parker, Thomas C. and Engelbrecht Clemmensen, Karina and Friggens, Nina L. and Hartley, Iain P. and Johnson, David and Lindahl, Björn and Olofsson, Johan and Siewert, Matthias B. and Street, Lorna E. and Subke, Jens-Arne and Wookey, Philip A.
(2020).
Rhizosphere allocation by canopy-forming species dominates soil CO2 efflux in a subarctic landscape.
New Phytologist. 227
, 1818-1830
[Research article]
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Abstract
In arctic ecosystems, climate change has increased plant productivity. As arctic carbon (C) stocks predominantly are located belowground, the effects of greater plant productivity on soil C storage will significantly determine the net sink/source potential of these ecosystems, but vegetation controls on soil CO2 efflux remain poorly resolved.In order to identify the role of canopy-forming species in belowground C dynamics, we conducted a girdling experiment with plots distributed across 1 km(2) of treeline birch (Betula pubescens) forest and willow (Salix lapponum) patches in northern Sweden and quantified the contribution of canopy vegetation to soil CO2 fluxes and belowground productivity.Girdling birches reduced total soil CO2 efflux in the peak growing season by 53%, which is double the expected amount, given that trees contribute only half of the total leaf area in the forest. Root and mycorrhizal mycelial production also decreased substantially. At peak season, willow shrubs contributed 38% to soil CO2 efflux in their patches.Our findings indicate that C, recently fixed by trees and tall shrubs, makes a substantial contribution to soil respiration. It is critically important that these processes are taken into consideration in the context of a greening arctic because productivity and ecosystem C sequestration are not synonymous.
Authors/Creators: | Parker, Thomas C. and Engelbrecht Clemmensen, Karina and Friggens, Nina L. and Hartley, Iain P. and Johnson, David and Lindahl, Björn and Olofsson, Johan and Siewert, Matthias B. and Street, Lorna E. and Subke, Jens-Arne and Wookey, Philip A. | ||||||
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Title: | Rhizosphere allocation by canopy-forming species dominates soil CO2 efflux in a subarctic landscape | ||||||
Series Name/Journal: | New Phytologist | ||||||
Year of publishing : | 2020 | ||||||
Volume: | 227 | ||||||
Page range: | 1818-1830 | ||||||
Number of Pages: | 13 | ||||||
ISSN: | 0028-646X | ||||||
Language: | English | ||||||
Publication Type: | Research article | ||||||
Article category: | Scientific peer reviewed | ||||||
Version: | Published version | ||||||
Copyright: | Creative Commons: Attribution 4.0 | ||||||
Full Text Status: | Public | ||||||
Subjects: | (A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology | ||||||
Keywords: | Arctic, ectomycorrhizal fungi, girdling, rhizosphere, shrub expansion, soil CO2 efflux, treeline | ||||||
URN:NBN: | urn:nbn:se:slu:epsilon-p-105693 | ||||||
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-105693 | ||||||
Additional ID: |
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ID Code: | 17617 | ||||||
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap | ||||||
Department: | (NL, NJ) > Dept. of Forest Mycology and Plant Pathology (S) > Dept. of Forest Mycology and Plant Pathology (NL, NJ) > Dept. of Soil and Environment (S) > Dept. of Soil and Environment | ||||||
Deposited By: | SLUpub Connector | ||||||
Deposited On: | 29 Sep 2020 10:30 | ||||||
Metadata Last Modified: | 15 Jan 2021 19:44 |
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