A multi-proxy paleoecological study of Anderson Fen, Central Vancouver Island, British Columbia, Canada

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dc.contributor.authorAdeleye, Matthew A.
dc.contributor.supervisorLacourse, Terri
dc.date.accessioned2018-10-31T23:14:54Z
dc.date.copyright2018en_US
dc.date.issued2018-10-31
dc.degree.departmentDepartment of Biology
dc.degree.levelMaster of Science M.Sc.en_US
dc.description.abstractA paleoecological study was carried out on a 4.7 m peat core from Anderson Fen on central Vancouver Island, using a multi-proxy approach. Pollen, non-pollen palynomorphs, and physicochemical analyses were used to document past vegetation, peatland developmental history, and carbon and nitrogen accumulation rates over the last 14,000 years. Lake sediment and aquatic plant remains at the base of the core indicate a shallow pond was present at the site after deglaciation. By ~11,700 calendar years before present (cal yr BP), the shallow pond became a herb-dominated wetland (marsh) through terrestrialization. Bog formation started around 10,500 cal yr BP with decreasing water levels, as indicated by high C:N, Sphagnum and fungal remains, and testate amoebae such as Archerella flavum and Heleopera. A fen developed by ~9400 cal yr BP with fluctuating water levels through the rest of Holocene. Carbon accumulation rates were highest towards the surface and during the early Holocene warm period, with an overall mean rate of 12.9 g/m2/cal yr, which is low compared to continental and northern peatlands. Pollen analysis reveals that non-arboreal communities dominated by Salix prevailed soon after deglaciation before the expansion of Pinus forests 13,200 cal yr BP. Pseudotsuga menziesii dominated forests between ~10,700 and 8400 cal yr BP under warm and dry conditions. Tsuga heterophylla rainforest was established by ~7000 cal yr BP under increasingly cool and wet conditions. Overall, Anderson fen and the surrounding area experienced major and rapid changes in environmental conditions and vegetation in response to climate change during the late glacial and early Holocene, while mid- to late Holocene changes have been more subtle and relatively gradual.en_US
dc.description.embargo2020-10-25
dc.description.scholarlevelGraduateen_US
dc.identifier.bibliographicCitationAdeleye, M. A., Adebayo, M. B. and Adeonipekun, P. A. (2018). Palynological study of recent surface sediments from coastal area of Lagos, Nigeria. Ife Journal of Science 20 (1): 199-205.en_US
dc.identifier.bibliographicCitationAdeleye, M. A., Akinsoji, A. and Adeonipekun, P. A. (2017). A survey of vascular epiphytes of oil palms (Elaeisguineensis Jacq.) in Lekki conservation centre, Lagos, Nigeria. FUW Trends in Science and Technology Journal 2(1): 74 -78.en_US
dc.identifier.bibliographicCitationAdebayo, M. B., Adeonipekun, P. A., Adeleye, M. A. and Kemabonta, K. A. (2017). Comparative palynology of Macrotermes sp. mounds and Vespula vulgaris nests on the University of Lagos campus, Akoka: preliminary study. Acta Palaeobotanica 57(2): 397-406.en_US
dc.identifier.urihttp://hdl.handle.net/1828/10211
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectPaleoecologyen_US
dc.subjectPeatlanden_US
dc.subjectPeatland developmenten_US
dc.subjectPeatland ecologyen_US
dc.subjectCarbon accumulationen_US
dc.subjectHoloceneen_US
dc.subjectVancouver Islanden_US
dc.subjectVegetationen_US
dc.subjectForesten_US
dc.subjectPollenen_US
dc.subjectPollen and sporeen_US
dc.subjectTestate amoebaeen_US
dc.titleA multi-proxy paleoecological study of Anderson Fen, Central Vancouver Island, British Columbia, Canadaen_US
dc.typeThesisen_US

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