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UBC Theses and Dissertations

A taxonomic and ecological study of the intertidal, sand-dwelling dinoflagellates of the north eastern pacific ocean Baillie, Kenneth Dale


The primary purpose of this study was to deal with the taxonomy of the sand-dwelling dinoflagellates occurring in the North East Pacific Ocean. A preliminary examination of the community and the major ecological parameters affecting these organisms (exposure, grain size, temperature and salinity) was also undertaken. Although the study was mainly confined to those species inhabiting the inter-tidal zones of five marine beaches in British Columbia, some subtidal work was done. The conclusions are based on the analysis of approximately 120 samples from 15 field trips over a one year period. Forty-one species were recorded of which 12 could not be identified and may warrant being described as new species. In general, the number of both species and individual cells increased from winter to spring and summer with maximum comentrations between March and September. Out of the environmental parameters measured, grain size (which is primarily determined by tides and currents) is probably the most important factor in determining the distributions of these organisms in the summer months.

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