St.JacquesDouglasMcAndrews2000

Référence

St-Jacques, J.-M., Douglas, M.S.V., McAndrews, J.H. (2000) Mid-holocene hemlock decline and diatom communities in van Nostrand Lake, Ontario, Canada. Journal of Paleolimnology, 23(4):385-397. (Scopus )

Résumé

Terrestrial ecosystem disturbances inferred from the fossil hemlock pollen decline (ca. 4,800 BP) and recovery (ca. 3,800 BP) affected van Nostrand Lake including the diatom communities. Ecological models suggest the lake responded by eutrophying, reflecting higher nutrient influx resulting from increased erosion. A decline in lake productivity followed as the forest vegetation recovered and erosion slowed. Lastly, as the forest switched from early and middle successional species to mature species, lake productivity increased as erosion increased nutrient inflow, especially phosphorus. However, this eutrophication response was delayed or buffered, perhaps due to wetland development surrounding the lake. The lake never fully returned to its initial, pre-hemlock decline state, but oscillated between more eutrophic and more mesotrophic or oligotrophic stages, possibly reflecting other disturbances in the catchment and climatic change.

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@ARTICLE { St.JacquesDouglasMcAndrews2000,
    AUTHOR = { St-Jacques, J.-M. and Douglas, M.S.V. and McAndrews, J.H. },
    TITLE = { Mid-holocene hemlock decline and diatom communities in van Nostrand Lake, Ontario, Canada },
    JOURNAL = { Journal of Paleolimnology },
    YEAR = { 2000 },
    VOLUME = { 23 },
    NUMBER = { 4 },
    PAGES = { 385-397 },
    NOTE = { cited By 16 },
    ABSTRACT = { Terrestrial ecosystem disturbances inferred from the fossil hemlock pollen decline (ca. 4,800 BP) and recovery (ca. 3,800 BP) affected van Nostrand Lake including the diatom communities. Ecological models suggest the lake responded by eutrophying, reflecting higher nutrient influx resulting from increased erosion. A decline in lake productivity followed as the forest vegetation recovered and erosion slowed. Lastly, as the forest switched from early and middle successional species to mature species, lake productivity increased as erosion increased nutrient inflow, especially phosphorus. However, this eutrophication response was delayed or buffered, perhaps due to wetland development surrounding the lake. The lake never fully returned to its initial, pre-hemlock decline state, but oscillated between more eutrophic and more mesotrophic or oligotrophic stages, possibly reflecting other disturbances in the catchment and climatic change. },
    AFFILIATION = { Department of Botany, University of Toronto, Toronto, Ont. M5S 3B2, Canada; Department of Geology, University of Toronto, Toronto, Ont. M5S 1A1, Canada; Royal Ontario Museum, Toronto, Ont. M5S 2C6, Canada },
    AUTHOR_KEYWORDS = { Diatoms; Forest disturbance; Hemlock; Ontario },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1023/A:1008178002326 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034048456&doi=10.1023%2fA%3a1008178002326&partnerID=40&md5=19bbc013a88bad6893f5cf5aaae98a5a },
}

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