MagnanLeStum-BoivinGarneauEtAl2019

Reference

Magnan, G., Le Stum-Boivin, E., Garneau, M., Grondin, P., Fenton, N.J., Bergeron, Y. (2019) Holocene vegetation dynamics and hydrological variability in forested peatlands of the Clay Belt, eastern Canada, reconstructed using a palaeoecological approach. Boreas, 48(1):131-146. (Scopus )

Abstract

Forested peatlands are widespread in boreal regions of Canada, and these ecosystems, which are major terrestrial carbon sinks, are undergoing significant transformations linked to climate change, fires and human activities. This study targets millennial-scale vegetation dynamics and related hydrological variability in forested peatlands of the Clay Belt south of James Bay, eastern Canada, using palaeoecological data. Changes in peatland vegetation communities were reconstructed using plant macrofossil analyses, and variations in water-table depths were inferred using testate amoeba analyses. High-resolution analyses of macroscopic charcoal >0.5 mm were used to reconstruct local fire history. Our data showed two successional pathways towards the development of present-day forested peatlands influenced by autogenic processes such as vertical peat growth and related drying, and allogenic factors such as the occurrence of local fires. The oldest documented peatland initiated in a wet rich fen around 8000 cal. a BP shortly after land emergence and transformed into a drier forested bog rapidly after peat inception that persisted over millennia. In the second site, peat started to accumulate from ~5200 cal. a BP over a mesic coniferous forest that shifted into a wet forested peatland following a fire that partially consumed the organic layer ~4600 cal. a BP. The charcoal records show that fires rarely occurred in these peatlands, but they have favoured the process of forest paludification and influenced successional trajectories over millennia. The macrofossil data suggest that Picea mariana (black spruce) persisted on the peatlands throughout their development, although there were periods of more open canopy due to local fires in some cases. This study brings new understanding on the natural variability of boreal forested peatlands which may help predict their response to future changes in climate, fire regimes and anthropogenic disturbances. © 2018 Collegium Boreas. Published by John Wiley & Sons Ltd

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@ARTICLE { MagnanLeStum-BoivinGarneauEtAl2019,
    AUTHOR = { Magnan, G. and Le Stum-Boivin, E. and Garneau, M. and Grondin, P. and Fenton, N.J. and Bergeron, Y. },
    TITLE = { Holocene vegetation dynamics and hydrological variability in forested peatlands of the Clay Belt, eastern Canada, reconstructed using a palaeoecological approach },
    JOURNAL = { Boreas },
    YEAR = { 2019 },
    VOLUME = { 48 },
    NUMBER = { 1 },
    PAGES = { 131-146 },
    NOTE = { cited By 0 },
    ABSTRACT = { Forested peatlands are widespread in boreal regions of Canada, and these ecosystems, which are major terrestrial carbon sinks, are undergoing significant transformations linked to climate change, fires and human activities. This study targets millennial-scale vegetation dynamics and related hydrological variability in forested peatlands of the Clay Belt south of James Bay, eastern Canada, using palaeoecological data. Changes in peatland vegetation communities were reconstructed using plant macrofossil analyses, and variations in water-table depths were inferred using testate amoeba analyses. High-resolution analyses of macroscopic charcoal >0.5 mm were used to reconstruct local fire history. Our data showed two successional pathways towards the development of present-day forested peatlands influenced by autogenic processes such as vertical peat growth and related drying, and allogenic factors such as the occurrence of local fires. The oldest documented peatland initiated in a wet rich fen around 8000 cal. a BP shortly after land emergence and transformed into a drier forested bog rapidly after peat inception that persisted over millennia. In the second site, peat started to accumulate from ~5200 cal. a BP over a mesic coniferous forest that shifted into a wet forested peatland following a fire that partially consumed the organic layer ~4600 cal. a BP. The charcoal records show that fires rarely occurred in these peatlands, but they have favoured the process of forest paludification and influenced successional trajectories over millennia. The macrofossil data suggest that Picea mariana (black spruce) persisted on the peatlands throughout their development, although there were periods of more open canopy due to local fires in some cases. This study brings new understanding on the natural variability of boreal forested peatlands which may help predict their response to future changes in climate, fire regimes and anthropogenic disturbances. © 2018 Collegium Boreas. Published by John Wiley & Sons Ltd },
    AFFILIATION = { Geotop Research Centre, Université du Québec à Montréal, CP 8888, succ. Centre-Ville, Montréal, QC H3C 3P8, Canada; Department of Geography, Geotop Research Centre, Université du Québec à Montréal, CP 8888, succ. Centre-Ville, Montréal, QC H3C 3P8, Canada; Ministère des Forêts, de la Faune et des Parcs du Québec (MFFP), Direction de la Recherche Forestière, 2700 rue EinsteinQC G1P 3W8, Canada; Forest Research Institute, Université du Québec en Abitibi-Témiscamingue, 445 Boul. de l'Université, Rouyn-Noranda, QC J9X 5E4, Canada; NSERC/UQAT/UQAM Industrial Chair in Sustainable Forest Management, Forest Research Institute, Université du Québec en Abitibi-Témiscamingue, 445 Boul. de l'Université, Rouyn-Noranda, QC J9X 5E4, Canada },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1111/bor.12345 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85053541601&doi=10.1111%2fbor.12345&partnerID=40&md5=fdedd726287934af1b159e1fa1c5b917 },
}

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