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

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
Description
Résumé:© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.
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
Description:Date Completed 24.01.2014
Date Revised 16.04.2021
published: Print-Electronic
CommentIn: New Phytol. 2013 Jul;199(1):7-9. doi: 10.1111/nph.12334. - PMID 23713551
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.12285