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Postglacial wetland succession, carbon accumulation and forest dynamics on the east coast of Vancouver Island, British Columbia, Canada

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dc.contributor.author Lacourse, Terri
dc.contributor.author Beer, Kyle W.
dc.contributor.author Craig, Kira B.
dc.contributor.author Canil, Dante
dc.date.accessioned 2019-06-27T15:22:59Z
dc.date.copyright 2019 en_US
dc.date.issued 2019
dc.identifier.citation Lacourse, T. & Beer, K.W. Craig, K.B. & Canil, D.(2019). Postglacial wetland succession, carbon accumulation, and forest dynamics on the east coast of Vancouver Island, British Columbia, Canada, Quaternary Research, 92(1), 232-245. https://doi.org/10.1017/qua.2018.146 en_US
dc.identifier.uri https://doi.org/10.1017/qua.2018.146
dc.identifier.uri http://hdl.handle.net/1828/10938
dc.description.abstract Peatland development and carbon accumulation on the Pacific coast of Canada have received little attention in paleoecological studies, despite wetlands being common landscape features. Here, we present a multi–proxy paleoenvironmental study of an ombrotrophic bog in coastal British Columbia. Following decreases in relative sea level, the wetland was isolated from marine waters by 13,300 cal yr BP. Peat composition, non-pollen palynomorph, and C and N analyses demonstrate terrestrialization from an oligotrophic lake to a marsh by 11,600 cal yr BP, followed by development of a poor fen, and then a drier ombrotrophic bog by 8700 cal yr BP. Maximum carbon accumulation occurred during the early Holocene fen stage, when seasonal differences in insolation were amplified. This highlights the importance of seasonality in constraining peatland carbon sequestration by enhancing productivity during summer and reducing decomposition during winter. Pollen analysis shows that Pinus contorta dominated regional forests by 14,000 cal yr BP. Warm and relatively dry summers in the early Holocene allowed Pseudotsuga menziesii to dominate lowland forests 11,200–7000 cal yr BP. Tsuga heterophylla and P. menziesii formed coniferous forest in the mid- and late Holocene. Tephra matching the mid-Holocene Glacier Peak–Dusty Creek assemblage provides evidence of its most northwesterly occurrence to date. en_US
dc.description.sponsorship This research was supported by research grants to TL from the Natural Sciences and Engineering Research Council of Canada (342003) and Canada Foundation for Innovation (17214). Pollen data are archived in the Neotoma Paleoecology Database. en_US
dc.language.iso en en_US
dc.publisher Quaternary Research en_US
dc.subject Peatlands en_US
dc.subject Terrestrialization en_US
dc.subject Carbon accumulation en_US
dc.subject Nitrogen accumulation en_US
dc.subject Pollen en_US
dc.subject Non-pollen palynomorphs en_US
dc.subject Plant macrofossils en_US
dc.subject Coniferous forest en_US
dc.subject Glacer Peak tephra en_US
dc.subject Coastal British Columbia en_US
dc.title Postglacial wetland succession, carbon accumulation and forest dynamics on the east coast of Vancouver Island, British Columbia, Canada en_US
dc.type Postprint en_US
dc.description.scholarlevel Faculty en_US
dc.description.reviewstatus Reviewed en_US
dc.description.embargo 2020-02-01


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