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PRELIMINARY SURVEY OF THE SUBLITTORAL FLORA OF HALIFAX COUNTY,
NATIONAL RESEARCH COUNCIL OF CANADA HALIFAX (NOVA SCOTIA) ATLANTIC REGIONAL LAB
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During the autumn of 1965 and the summer of 1966, observations and sublittoral collections to a depth of 40 m were made of the benthic vegetation of the Atlantic coast of Halifax County. A total of 166 species exclusive of crustose corallines were recorded and distributed as 72 Rhodophyceae, 66 Phaeophyceae, 26 Chlorophyceae, 1 Xanthophyceae, and 1 Chrysophyceae. Thirty-three of these species have been recorded as new to Nova Scotia. Very few of the macrophytic species collected are exclusively sublittoral. Three distinct vegetational associations, each characteristic of a particular depth range, were recognized. From the sublittoral fringe to a depth of about 15 m, a Laminaria-Desmarestia association occurs. Below 10 m the flora is dominated by an Agarum-Ptilota association, and at 30-40 m a Phyllophora-Polysiphonia association is present. In some species morphological variations were correlated with depth. Author
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