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BioChem: Planktonic Foraminifera in the Equatorial and Northern Pacific Waters (A Hudson 70 Expedition Data Set) (OBIS Canada)

Entry ID: OBIS.DFO_MAR_Hudson70_Forams

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Summary

Abstract: Twenty-nine plankton tows were collected at different water depths in the equatorial and northern Pacific Ocean during the Hudson 70 cruise. Thirty planktonic foraminiferal species, belonging to eleven genera and three families, have been identified. Absolute and relative abundance of individual species, their size, structural modifications, and coiling directions of the tests are compared with ... the physical and chemical parameters of the Pacific Water masses. Five major groups of species including warm tropical, warm temperate, cold temperate, cold water and cosmopolitan, were mapped in three different water masses designated here as- Southern, Central and Northern or subartic. The abundance ratio of specimens in surface compared to sub-surface waters is approximately 5:1. A weak direct relationship exists between water temperature and salinity and the absolute abundance of species diversity of the foraminifera population. There appears to be no simple relationship between size, maturity of forms and various physical factors generally considered to affect the entire faunal assemblage. Kummerform development appears to be an ontogenic feature more or less independent of surrounding physical conditions.

Typical specimens of Globigerina pachyderma (Ehrenberg) occur in large number in the Northern water mass of the Pacific. Reproduction cycles of several species (e.g. Globorotalia scitula (Brady) and Globorotalia truncatulinoides (D’Orbigny)) are confirmed indirectly, based on the extreme paucity of specimens in the samples analyzed for this study.

Plankton tows were collected with a modified Benthos Multiple Plankton Sampler fitted with 200-micron mesh nets. The device was initially submerged to a depth of 25 metres and towed at a speed of about 1.5 knots for 15 minutes. Two additional tows were made during each cast at 350 and 750 metre depths respectively. The samples collected represent planktonic specimens resident in the 0-200, 200-500, and 500-1000 metre water layers respectively. It is assumed, however, that the concentration of planktonic formanifera is roughly constant in the water layers and that there is no appreciable diurnal change in the faunal population. The volume of water filtered through the nets was monitored using the TSK flow water meter attached to one side of the sampler frame. It was integrated with a Benthos Model 1023 acoustic telemeter. The samples were washed from each net and preserved in 10% formalin solution buffered with hexamethylene tetramine.

In the laboratory, the plankton samples were split into a number of fractions depending upon their plankton concentrations. This procedure was used to reduce the final subsample to a convenient size. On the average, the half-splitting was found to be satisfactory.

The split sample was sieved through a 63-micron mesh and the strained material then ignited in a low temperature TRACELAB LTA 600 asher to remove the organic constituents (Vilks, 1970).

After ashing the samples were washed with water and later transferred to a disposable Millipore petri dish. The foraminiferal counts and other morphological observations were made on this petri dish using binocular microscopy. Detailed morphological features were studied using a JEOL Scanning Electron Microscope.

OBIS Schema concepts implemented in this data set are:
RES_NAME, DATELASTMODIFIED, INSTITUTIONCODE, COLLECTIONCODE, BASISOFRECORD, KINGDOM, GENUS, SPECIES, COLLECTOR, YEARCOLLECTED, MONTHCOLLECTED, DAYCOLLECTED, TIMEOFDAY, LONGITUDE, LATITUDE, MINIMUMDEPTH, MAXIMUMDEPTH, FIELDNUMBER, CATALOGNUMBER, SAMPLESIZE, SCIENTIFICNAME, SCIENTIFICNAMEAUTHOR, LIFESTAGE, SEX, OBSERVEDINDIVIDUALCOUNT, PHYLUM, CLASS, ORDER, FAMILY, SUBGENUS, SUBSPECIES,OBSERVEDWEIGHT, NOTES (AphiaID: value).

For OBIS Schema concept details see http://v2.iobis.org/tech/provider/

Related URL

Link: GET DATA

Description: iOBIS mapper for this dataset

Link: VIEW PROJECT HOME PAGE

Description: BioChem

Geographic Coverage

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Spatial coordinates

N: 55.0

S: -10.0

E: -150.0

W: -157.0

Data Set Citation

Dataset Originator/Creator: Kennedy, M.K.

Dataset Title: Planktonic Foraminifera in the Equatorial and Northern Pacific Waters (A Hudson 70 Expedition Dataset). In: Fisheries and Oceans Canada - BioChem

Dataset Series Name: OBIS Canada Digital Collections

Dataset Release Date: 2011

Dataset Release Place: Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada

Dataset Publisher: OBIS Canada

Version: 1

Data Presentation Form: Table Digital

Online Resource: http://www.iobis.org/

Temporal Coverage

Start Date: 1970-05-08

Stop Date: 1970-06-05

Location Keywords

OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN

OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN

Science Keywords

BIOLOGICAL CLASSIFICATION > PROTISTS

BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON

BIOSPHERE > AQUATIC ECOSYSTEMS

ISO Topic Category

BIOTA

ENVIRONMENT

OCEANS

Platform

SHIPS

Instrument

PLANKTON NETS

Project

OBIS > OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM

COML > CENSUS OF MARINE LIFE

Access Constraints None.

Use Constraints Acknowledge the use of specific records from contributing databases in the form
appearing in the 'Citation' field thereof (if any); and acknowledge the use of
the OBIS facility.

For information purposes, email to obissupport@marine.rutgers.edu the full
citation of any publication made (printed or electronic) that cites OBIS or any
constituent part.

Recognize the limitations of data in OBIS. see http://iobis.org/data/policy/disclaimer for more details

Ancillary Keywords

181069050

Hudson 70 Expedition

Data Set Progress

COMPLETE

Originating Center

Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada

Data Center

International Ocean Biogeographic Information System

Data Center URL: http://www.iobis.org/

Data Center Personnel
Name: PHOEBE ZHANG Phone: (732) 932-6555 x 503 Fax: 54-2965-451543 Email: phoebe at marine.rutgers.edu Contact Address: Institute of Marine and Coastal Sciences Rutgers University 71 Dudley Road City: New Brunswick Province or State: NJ Postal Code: 08901-8521 Country: USA

Distribution

Distribution Media: HTTP

Distribution Format: OBIS Schema

Fees: None

Personnel

MARY KENNEDY

Role: DIF AUTHOR

Email: mary.kennedy at dfo-mpo.gc.ca

Contact Address:

Bedford Institute of Oceanography, P.O. Box 1006

City: Dartmouth

Province or State: Nova Scotia

Postal Code: B2Y 4A2

Country: Canada

Publications/References

Banerji, R.K., C.T. Schafer and R. Vine. 1971. Environmental relationships and distribution of planktonic foraminifera in the equatorial and nothern Pacific waters. Atlantic Oceanographic Laboratory, AOL Report 1971-7. 65p. Plus 15p. Of appendices and plates

Creation and Review Dates

DIF Creation Date: 2011-04-26

Last DIF Revision Date: 2011-11-16

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