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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
Author(s): Street, Lorna E
Subke, Jens-Arne
Sommerkorn, Martin
Sloan, Victoria
Ducrotoy, Helene
Phoenix, Gareth K
Williams, Mathew
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Keywords: belowground
carbon allocation
carbon use efficiency
CO2 flux
gross primary productivity (GPP)
Forest soils Northern Hemisphere
Soil ecology Northern Hemisphere
Soil chemistry Northern Hemisphere
Forests and forestry Northern Hemisphere
Issue Date: Jul-2013
Date Deposited: 17-Jun-2013
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.
DOI Link: 10.1111/nph.12285
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