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Resting cysts of freshwater dinoflagellates in southeastern Georgian Bay (Lake Huron) as proxies of cultural eutrophication

Review of Palaeobotany and Palynology, ISSN: 0034-6667, Vol: 166, Issue: 1, Page: 46-62
2011
  • 35
    Citations
  • 0
    Usage
  • 69
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    35
    • Citation Indexes
      35
  • Captures
    69
  • Mentions
    1
    • References
      1
      • 1

Article Description

Resting cysts attributed to the freshwater dinoflagellate genus Peridinium were found in surface sediments from Severn Sound, southeastern Georgian Bay (Lake Huron, Laurentian Great Lakes of North America). Two distinct cyst morphotypes were present and they were assigned to Peridinium wisconsinense Eddy, 1930 and Peridinium willei Huitfeldt-Kaas, 1900 by establishing cyst–theca relationships through germinations and single-cell LSU rDNA analysis on an excysted cell of Peridinium willei. Sediments recovered from deep, sheltered portions of Severn Sound and restricted basins like Honey Harbour contained between ~ 750 and 8500 cysts/cm 3. However, winnowing by bottom currents and high concentrations of dissolved oxygen adversely impact the dinoflagellate cyst record on the lakebed, and cyst concentrations in easily remobilized muds on bathymetric highs were < 100 cysts/cm 3.

Bibliographic Details

Francine M.G. McCarthy; Kenneth Neil Mertens; Marianne Ellegaard; Keith Sherman; Vera Pospelova; Sofia Ribeiro; Stephan Blasco; Dries Vercauteren

Elsevier BV

Agricultural and Biological Sciences; Earth and Planetary Sciences

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