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Palaeoecology of an Arctic Peathland Ecosystem Covering a Terrace at the Mouth of the Guichaud River, Salluit, Nunavik, Canada
1 Laval University
2 Laval University
In order to identify climate fluctuations during the recent Holocene, a 182 cm peat core extracted from a peatland ecosystem in the Salluit region of Nunavik (Canada) was subjected to macrofossil and pollen analyses. Peat accumulation began in the site at around 2340 cal yr BP. Four distinct Holocene climatic periods were identified. Between 1910 and 1100 cal yr BP, the climate was warm and humid, which favoured the growth of several species of Sphagnum (from poorly minerotrophic to ombrotrophic conditions). Starting at around 1100 cal yr BP, a colder, drier climate developed and caused the Sphagnum to disappear. Warm and humid conditions returned at around 870 cal yr BP and lasted until 670 cal yr BP. Subsequently, the climate once again became cold and dry, which induced eolian activity.
Fig 1. Figure 1. Location map of the study area
Fig 2. Figure 2. The study arctic peatland, Nunavik, Northern Quebec, Canada
Fig 3. Figure 3. The analyzed peat accumulated over deltaic sediments