The role of mosses in carbon uptake and partitioning in arctic vegetation

© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.

Détails bibliographiques
Publié dans:The New phytologist. - 1990. - 199(2013), 1 vom: 03. Juli, Seite 163-175
Auteur principal: Street, Lorna E (Auteur)
Autres auteurs: Subke, Jens-Arne, Sommerkorn, Martin, Sloan, Victoria, Ducrotoy, Helene, Phoenix, Gareth K, Williams, Mathew
Format: Article en ligne
Langue:English
Publié: 2013
Accès à la collection:The New phytologist
Sujets:Journal Article Research Support, Non-U.S. Gov't Carbon Isotopes Carbon Dioxide 142M471B3J Carbon 7440-44-0
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500 |a CommentIn: New Phytol. 2013 Jul;199(1):7-9. doi: 10.1111/nph.12334. - PMID 23713551 
500 |a Citation Status MEDLINE 
520 |a © 2013 The Authors. New Phytologist © 2013 New Phytologist Trust. 
520 |a 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 (13) C 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 (13) C 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 
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700 1 |a Subke, Jens-Arne  |e verfasserin  |4 aut 
700 1 |a Sommerkorn, Martin  |e verfasserin  |4 aut 
700 1 |a Sloan, Victoria  |e verfasserin  |4 aut 
700 1 |a Ducrotoy, Helene  |e verfasserin  |4 aut 
700 1 |a Phoenix, Gareth K  |e verfasserin  |4 aut 
700 1 |a Williams, Mathew  |e verfasserin  |4 aut 
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