Dataset

Benthic Forams collected on the Continental Margin off Nova Scotia between 1979-1981

OBIS Canada Open in mapper Explore occurrences

Data on marine benthonic foraminifera were obtained from samples collected by Shipek grab from the continental margin off Nova Scotia, Canada. Samples were collected from the benthos in water depths ranging from 16 metres to 440 metres and once brought shipboard sediment was scraped off the surface (20ml)of the sample and preserved in a combination of seawater and formaldehyde buffered with borax. In the laboratory, samples were sieved and stained in Rose Bengal and then dried and concentrated by flotation in carbon tetrachloride. Relative abundance of each species of foraminifera was then recorded. Survey results consist of density (number of individuals per cubic centimetre). The original survey report (Williamson, 1983) contains information on temperature, slope, percent gravel, sand and mud. The OBIS view of this dataset includes only the abundance and biomass information.

Citation: Williamson, M.A. 2013. Benthic Forams collected on the Continental Margin off Nova Scotia between 1979-1981. Ver 1 In OBIS Canada Digital Collections. Bedford Institute of Oceanography, Dartmouth, NS, Canada. Published by OBIS, Digital http://www.iobis.org/. Accessed on –INSERT DATE

Published: April 16, 2021 at 11:33

URL: http://ipt.iobis.org/obiscanada/resource?r=obis_dal_williamson1983

Mark Williamson
Dalhousie University

Stephanie Howitt

M.A. Williamson

3,684
occurrence records
75
taxa
74
species

Taxa

Missing and invalid fields

Field Missing Invalid
coordinateUncertaintyInMeters 3,684
100.0%
eventDate 3,684
100.0%
maximumDepthInMeters 73
2.0%
minimumDepthInMeters 73
2.0%
occurrenceStatus 3,684
100.0%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag Dropped Records
DEPTH_EXCEEDS_BATH 199
5.4%
NO_DEPTH 73
2.0%
ZERO_COORD 73
2.0%
ON_LAND 9
0.2%

Measurement types

DNA derived data