caa a22 4500 445383895 CHVBK 20180317143026.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10021-011-9429-7 doi (NATIONALLICENCE)springer-10.1007/s10021-011-9429-7 Soil Carbon Stocks and Soil Carbon Quality in the Upland Portion of a Boreal Landscape, James Bay, Quebec [Elektronische Daten] [David Paré, Jessica Banville, Michelle Garneau, Yves Bergeron] As part of a multidisciplinary project on carbon (C) dynamics of the ecosystems characterizing the Eastmain Region Watershed (James Bay, Quebec), the objective of this study is to compare the soil C stocks and soil organic matter quality among the main upland vegetation types in a boreal region subjected to a high fire frequency. On average, the organic layer contained twice the amount of C than the mineral soil. Closed canopy vegetation types had greater C stocks both in the mineral and in the organic layers than the other more open canopy vegetation types. Landscape features such as drainage and surficial deposit could not discriminate between vegetation types although closed vegetation types were on average found on wetter site conditions. Average soil C contents varied more than 2-fold across vegetation types. On the opposite, except for the organic layer C:N ratio, which was smaller in closed vegetation types, other measured soil organic matter properties (namely specific rate of evolved C after a long-term incubation, hydrolysis acid-resistant C as well as the rate of changes in 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 and estimated summer soil heterotrophic respiration rate. The homogeneity of soil organic matter quality across the vegetation types could be attributable to the positive relationship between soil C storage and soil C fluxes observed in this landscape experiencing a high fire frequency. The low variability in soil C quality could help simplify the modelling of soil C fluxes in this environment. Her Majesty the Queen in Right of Canada, 2011 soil C cycling nationallicence boreal forest nationallicence soil organic matter quality nationallicence scaling nationallicence landscape nationallicence fire cycle nationallicence Paré David Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du P.E.P.S., P.O. Box 10380, G1V 4C7, Stn. Sainte-Foy, Quebec, Quebec, Canada aut Banville Jessica Département de Géographie, Université du Québec à Montréal, H3C 3P8, Montreal, Quebec, Canada aut Garneau Michelle Département de Géographie, Université du Québec à Montréal, H3C 3P8, Montreal, Quebec, Canada aut Bergeron Yves Chaire Industrielle CRSNG-UQAT-UQAM en Aménagement Forestier Durable, Université du Québec en Abitibi-Témiscamingue, 445 Boulevard de l'Université, J9X 5E4, Rouyn-Noranda, Quebec, Canada aut Ecosystems Springer-Verlag 14/4(2011-06-01), 533-546 1432-9840 14:4<533 2011 14 10021 https://doi.org/10.1007/s10021-011-9429-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-011-9429-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Paré David Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du P.E.P.S., P.O. Box 10380, G1V 4C7, Stn. Sainte-Foy, Quebec, Quebec, Canada aut NATIONALLICENCE 700 1- Banville Jessica Département de Géographie, Université du Québec à Montréal, H3C 3P8, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Garneau Michelle Département de Géographie, Université du Québec à Montréal, H3C 3P8, Montreal, Quebec, Canada aut NATIONALLICENCE 700 1- Bergeron Yves Chaire Industrielle CRSNG-UQAT-UQAM en Aménagement Forestier Durable, Université du Québec en Abitibi-Témiscamingue, 445 Boulevard de l'Université, J9X 5E4, Rouyn-Noranda, Quebec, Canada aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/4(2011-06-01), 533-546 1432-9840 14:4<533 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer