Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/15501
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: The role of mosses in carbon uptake and partitioning in arctic vegetation
Authors: Street, Lorna E
Subke, Jens-Arne
Sommerkorn, Martin
Sloan, Victoria
Ducrotoy, Helene
Phoenix, Gareth K
Williams, Mathew
Contact Email: jens-arne.subke@stir.ac.uk
Keywords: belowground
biomass
bryophyte
carbon allocation
carbon use efficiency
CO2 flux
gross primary productivity (GPP)
tundra
Issue Date: Jul-2013
Publisher: Wiley-Blackwell for New Phytologist Trust
Citation: Street LE, Subke J, Sommerkorn M, Sloan V, Ducrotoy H, Phoenix GK & Williams M (2013) The role of mosses in carbon uptake and partitioning in arctic vegetation, New Phytologist, 199 (1), pp. 163-175.
Abstract: - The Arctic is already experiencing changes in plant community composition, so understanding the contribution of different vegetation components to carbon (C) cycling is essential in order to accurately quantify ecosystem C balance. Mosses contribute substantially to biomass, but their impact on carbon use efficiency (CUE) - the proportion of gross primary productivity (GPP) incorporated into growth - and aboveground versus belowground C partitioning is poorly known. - We used 13C pulse-labelling to trace assimilated C in mosses (Sphagnum sect. Acutifolia and Pleurozium schreberi) and in dwarf shrub-P. schreberi vegetation in sub-Arctic Finland. Based on 13C pools and fluxes, we quantified the contribution of mosses to GPP, CUE and partitioning. - Mosses incorporated 20 ± 9% of total ecosystem GPP into biomass. CUE of Sphagnum was 68-71%, that of P. schreberi was 62-81% and that of dwarf shrub-P. schreberi vegetation was 58-74%. Incorporation of C belowground was 10 ± 2% of GPP, while vascular plants alone incorporated 15 ± 4% of their fixed C belowground. - We have demonstrated that mosses strongly influence C uptake and retention in Arctic dwarf shrub vegetation. They increase CUE, and the fraction of GPP partitioned aboveground. Arctic C models must include mosses to accurately represent ecosystem C dynamics.
Type: Journal Article
URI: http://hdl.handle.net/1893/15501
DOI Link: http://dx.doi.org/10.1111/nph.12285
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Edinburgh
Biological and Environmental Sciences
The James Hutton Institute
University of Sheffield
University of Edinburgh
University of Sheffield
University of Edinburgh

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