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1 March 2006 Reconstruction of changes in vegetation and trophic conditions of a palsa in a permafrost peatland, subarctic Québec, Canada
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Abstract

Macrofossil and chronostratigraphic data of a peat monolith extracted from a palsa within a subarctic permafrost peatland were used to reconstruct changes in vegetation and trophic conditions of the study site during the last 4500 cal y BP. The vegetation cover developed from Carex marsh or wet meadow to poor fen, bog, and to palsa peatland communities. The ombrotrophication was favoured by late-Holocene cooling and by the high peat accumulation. Permafrost inception began about 1660–1630 calibrated y BP, at the end of the Sphagnum accumulation stage. A comparison of the late-Holocene development of two peatlands in the same region (Arlen-Pouliot & Bhiry, 2005, and this study) suggests that permafrost initiation was due to a cool, dry climate associated with the Little Ice Age. However, Sphagnum cover prevented the permafrost from melting.

Najat Bhiry and Élisabeth C. Robert "Reconstruction of changes in vegetation and trophic conditions of a palsa in a permafrost peatland, subarctic Québec, Canada," Ecoscience 13(1), (1 March 2006). https://doi.org/10.2980/1195-6860(2006)13[56:ROCIVA]2.0.CO;2
Received: 7 October 2004; Accepted: 27 June 2005; Published: 1 March 2006
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