TalbotRouletSonnentagEtAl2014

Référence

Talbot, J., Roulet, N.T., Sonnentag, O. and Moore, T.R. (2014) Increases in aboveground biomass and leaf area 85 years after drainage in a bog. Botany, 92(10):713-721. (Scopus )

Résumé

Climate change scenarios suggest that northern peatlands could become drier. To address the type and magnitude of vegetation change associated with persistent drying, we studied changes in biomass and leaf area index following drainage 85 years previously of a bog, using destructive sampling, allometric relationships, and optical measurements. Our results show a 10-fold increase in aboveground biomass between the reference site and the most severely drained site, resulting from the growth of a tree layer. The total leaf biomass increased slightly as a result of drainage, thus an increase in woody biomass was the main cause of the increase in aboveground biomass. Leaf area index approximately tripled in sites where trees grew. Sphagnum L. moss biomass decreased from 120 g·m−2 at the reference site (20% of all aboveground biomass) to 8 g·m−2 under the tree canopy (<1% of all aboveground biomass). The percentage of deciduous shrubs increased from 3% of the total shrub biomass in the reference site to 72% in the most severely drained site. Our results show that lowering the water table of a bog can have a profound effect on vegetation but the net effect of these changes on the role of the peatland as a carbon sink remains difficult to assess. © 2014, National Research Council of Canada. All rights reserved.

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@ARTICLE { TalbotRouletSonnentagEtAl2014,
    AUTHOR = { Talbot, J. and Roulet, N.T. and Sonnentag, O. and Moore, T.R. },
    TITLE = { Increases in aboveground biomass and leaf area 85 years after drainage in a bog },
    JOURNAL = { Botany },
    YEAR = { 2014 },
    VOLUME = { 92 },
    NUMBER = { 10 },
    PAGES = { 713-721 },
    NOTE = { cited By 3 },
    ABSTRACT = { Climate change scenarios suggest that northern peatlands could become drier. To address the type and magnitude of vegetation change associated with persistent drying, we studied changes in biomass and leaf area index following drainage 85 years previously of a bog, using destructive sampling, allometric relationships, and optical measurements. Our results show a 10-fold increase in aboveground biomass between the reference site and the most severely drained site, resulting from the growth of a tree layer. The total leaf biomass increased slightly as a result of drainage, thus an increase in woody biomass was the main cause of the increase in aboveground biomass. Leaf area index approximately tripled in sites where trees grew. Sphagnum L. moss biomass decreased from 120 g·m−2 at the reference site (20% of all aboveground biomass) to 8 g·m−2 under the tree canopy (<1% of all aboveground biomass). The percentage of deciduous shrubs increased from 3% of the total shrub biomass in the reference site to 72% in the most severely drained site. Our results show that lowering the water table of a bog can have a profound effect on vegetation but the net effect of these changes on the role of the peatland as a carbon sink remains difficult to assess. © 2014, National Research Council of Canada. All rights reserved. },
    AFFILIATION = { Département de géographie, Université de Montréal, Pavillon 520, Ch. de la Côte-Ste-Catherine, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada; Department of Geography, McGill University, 805 Sherbrooke Street West, Montréal, QC, Canada },
    AUTHOR_KEYWORDS = { Aboveground biomass; Biomass allocation; Leaf area index; Peatland; Water-table drawdown },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1139/cjb-2013-0319 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907558990&doi=10.1139%2fcjb-2013-0319&partnerID=40&md5=083425cc59e640a3de9580e95950acee },
}

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