Smithsonian Digital Repository >
Smithsonian Contributions Series >
Smithsonian Contributions to the Earth Sciences >
|Title: ||Distribution of Echinarachnius parma (Lamarck) and Associated Fauna on Sable Island Bank, Southeast Canada|
|Authors: ||Stanley, Daniel J.|
James, Noel P.
|Issue Date: ||27-Apr-1971|
|Citation: ||Smithsonian Contributions to the Earth Sciences; 6|
|Abstract: ||A combined bottom photographic and sampling survey of Sable Island Bank southeast of Nova Scotia, Canada, reveals locally high densities (to 180 individual/m2)
of the northern sand dollar <em>Echinarachnius parma</em>. Populations of this
form are closely related to texture of the sea floor and generally concentrated
on moderately sorted fine to medium sand surfaces. Topography and current regime
are also correlatable factors; depth, time, salinity, and temperature apparently
are not. Sand dollars are second in importance, after current activity, in reworking
surficial sediments, and these organisms modify at least a third of the total
Bank surface in the study area. Bioturbation is particularly intense in the
sector north of Sable Island. Associated epifauna and infauna populations occur
in two east-west trending areas on the Bank north and south of Sable Island.
Absence of conspicuous fauna, save <em>E. parma,</em> in an east-west zone along
the crest of the Bank and near Sable Island results from extremely strong current
activity concentrated in this region.|
|Appears in Collections:||Smithsonian Contributions to the Earth Sciences|
Items in DSpace may be protected by copyright, with all rights reserved, unless otherwise indicated.