PareBanvilleGarneauEtAl2011

Référence

Pare, D., Banville, J.L., Garneau, M., Bergeron, Y. (2011) Soil Carbon Stocks and Soil Carbon Quality in the Upland Portionof a Boreal Landscape, James Bay, Quebec. Ecosystems, 14(4):533-546. (Scopus )

Résumé

As part of a multidisciplinary project on carbon (C) dynamics of theecosystems characterizing the Eastmain Region Watershed (James Bay,Quebec), the objective of this study is to compare the soil C stocksand soil organic matter quality among the main upland vegetationtypes in a boreal region subjected to a high fire frequency. On average,the organic layer contained twice the amount of C than the mineralsoil. Closed canopy vegetation types had greater C stocks both inthe mineral and in the organic layers than the other more open canopyvegetation types. Landscape features such as drainage and surficialdeposit could not discriminate between vegetation types althoughclosed vegetation types were on average found on wetter site conditions.Average soil C contents varied more than 2-fold across vegetationtypes. On the opposite, except for the organic layer C:N ratio, whichwas smaller in closed vegetation types, other measured soil organicmatter properties (namely specific rate of evolved C after a long-termincubation, hydrolysis acid-resistant C as well as the rate of changesin soil heterotrophic respiration with increasing temperature (Q10))remained within a narrow range between vegetation types. Therefore,total soil C stocks were a major determinant of both labile C andestimated summer soil heterotrophic respiration rate. The homogeneityof soil organic matter quality across the vegetation types couldbe attributable to the positive relationship between soil C storageand soil C fluxes observed in this landscape experiencing a highfire frequency. The low variability in soil C quality could helpsimplify the modelling of soil C fluxes in this environment. © 2011Her Majesty the Queen in Right of Canada.

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@ARTICLE { PareBanvilleGarneauEtAl2011,
    AUTHOR = { Pare, D. and Banville, J.L. and Garneau, M. and Bergeron, Y. },
    TITLE = { Soil Carbon Stocks and Soil Carbon Quality in the Upland Portionof a Boreal Landscape, James Bay, Quebec },
    JOURNAL = { Ecosystems },
    YEAR = { 2011 },
    VOLUME = { 14 },
    PAGES = { 533-546 },
    NUMBER = { 4 },
    ABSTRACT = { As part of a multidisciplinary project on carbon (C) dynamics of theecosystems characterizing the Eastmain Region Watershed (James Bay,Quebec), the objective of this study is to compare the soil C stocksand soil organic matter quality among the main upland vegetationtypes in a boreal region subjected to a high fire frequency. On average,the organic layer contained twice the amount of C than the mineralsoil. Closed canopy vegetation types had greater C stocks both inthe mineral and in the organic layers than the other more open canopyvegetation types. Landscape features such as drainage and surficialdeposit could not discriminate between vegetation types althoughclosed vegetation types were on average found on wetter site conditions.Average soil C contents varied more than 2-fold across vegetationtypes. On the opposite, except for the organic layer C:N ratio, whichwas smaller in closed vegetation types, other measured soil organicmatter properties (namely specific rate of evolved C after a long-termincubation, hydrolysis acid-resistant C as well as the rate of changesin soil heterotrophic respiration with increasing temperature (Q10))remained within a narrow range between vegetation types. Therefore,total soil C stocks were a major determinant of both labile C andestimated summer soil heterotrophic respiration rate. The homogeneityof soil organic matter quality across the vegetation types couldbe attributable to the positive relationship between soil C storageand soil C fluxes observed in this landscape experiencing a highfire frequency. The low variability in soil C quality could helpsimplify the modelling of soil C fluxes in this environment. © 2011Her Majesty the Queen in Right of Canada. },
    COMMENT = { Export Date: 27 May 2011Source: ScopusCODEN: ECOSFdoi: 10.1007/s10021-011-9429-7 },
    ISSN = { 14329840 (ISSN) },
    KEYWORDS = { boreal forest, fire cycle, landscape, scaling, soil C cycling, soilorganic matter quality },
    OWNER = { Luc },
    TIMESTAMP = { 2011.05.30 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-79955802412&partnerID=40&md5=0a524ba8f47e80acc5506337d04527ea },
}

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