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ANIMALS - INDIVIDUAL - COUNTS, Displacement Volume, SPECIES IDENTIFICATION - LIFE STAGE, TAXONOMIC CODE and species abundance profile and discrete sample data collected in the South Atlantic Ocean and South Pacific Ocean on the NATHANIEL B. PALMER cruises

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
27 September 2015
Modified Date
27 September 2015
Update Frequency
asNeeded
Publishers
National Oceanic and Atmospheric Administration, Department of Commerce
Title
ANIMALS - INDIVIDUAL - COUNTS, Displacement Volume, SPECIES IDENTIFICATION - LIFE STAGE, TAXONOMIC CODE and species abundance profile and discrete sample data collected in the South Atlantic Ocean and South Pacific Ocean on the NATHANIEL B. PALMER cruises NBP0103, NBP0104 and others as part of the Southern Ocean GLOBEC project from 2001-04-30 to 2002-09-11 (NODC Accession 0112171)
Identifier
animals-individual-counts-displacement-volume-species-identification-life-stage-taxonomic-co
Landing Page
http://catalog.data.gov/dataset/animals-individual-counts-displacement-volume-species-identification-life-stage-taxonomic-co
Temporal Coverage
30 April 2001 — 11 September 2002
Language
eng

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Description

NODC Accession 0112171 includes profile, discrete sample and biological data collected aboard the NATHANIEL B. PALMER during cruises NBP0103, NBP0104, NBP0202 and NBP0204 in the South Atlantic Ocean and South Pacific Ocean from 2001-04-30 to 2002-09-11. These data include ANIMALS - INDIVIDUAL - COUNTS, Displacement Volume, SPECIES IDENTIFICATION - LIFE STAGE, TAXONOMIC CODE and species abundance. The instruments used to collect these data include Multiple Opening/Closing Net and Environmental Sensing System (MOCNESS). These data were collected by Carin J. Ashjian of Woods Hole Oceanographic Institution as part of Southern Ocean GLOBEC. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NODC on 2013-07-31. The following is the text of the abstract provided by BCO-DMO: Zooplankton Abundance Based on Taxa and Life Stages or Size Classes, Collected during the Broadscale NB Palmer Cruises, Austral Autumn 2001 and 2002 The MOCNESS-1 plankton sampler has nine rectangular nets (1m x 1.4 m) with a mesh size of 0.333 mm, which are opened and closed sequentially by commands through conducting cable from the surface (Wiebe et al., 1976). Note: NBP0104 tows 1-11 used a 500 micron mesh for net 1 samples. Then it was moved to net 0 for remainder of tows. Cruises: Nathaniel B. Palmer, April-June 2001 (NBP01-03), 24 tows, cruise report (http://globec.whoi.edu/jg/serv/globec/soglobec/inventory.html2{dir=globec.whoi.edu/jg/dir/globec/soglobec/,info=globec.whoi.edu/jg/info/globec/soglobec/inventory}?project%20eq%20NBP0103,data_type%20eq%20cruise_report) Nathaniel B. Palmer, July-Sept. 2001 (NBP01-04), 17 tows, cruise report (http://globec.whoi.edu/jg/serv/globec/soglobec/inventory.html2{dir=globec.whoi.edu/jg/dir/globec/soglobec/,info=globec.whoi.edu/jg/info/globec/soglobec/inventory}?project%20eq%20NBP0104,data_type%20eq%20cruise_report) Nathaniel B. Palmer, April-May 2002 (NBP02-02), 24 tows, cruise report (http://globec.whoi.edu/jg/serv/globec/soglobec/inventory.html2{dir=globec.whoi.edu/jg/dir/globec/soglobec/,info=globec.whoi.edu/jg/info/globec/soglobec/inventory}?project%20eq%20NBP0202,data_type%20eq%20cruise_report) Nathaniel B. Palmer, July-Sept. 2002 (NBP02-04), 19 tows, cruise report (http://globec.whoi.edu/jg/serv/globec/soglobec/inventory.html2{dir=globec.whoi.edu/jg/dir/globec/soglobec/,info=globec.whoi.edu/jg/info/globec/soglobec/inventory}?project%20eq%20NBP0204,data_type%20eq%20cruise_report) 1Displacement volume measurement: Entire sample plus liquid was measured in a large graduated cylinder then poured through a sieve into a second cylinder. The difference in volume is the displacement volume. Methods: Zooplankton abundance, vertical and horizontal distribution, and population structure were assessed using a 1 m2 Multiple Opening and Closing Nets and Environmental Sampling System (MOCNESS) with nine nets having 333 micron mesh and environmental sensors of temperature, salinity and depth. The entire water column was sampled on the downcast using net # 0, which was not analyzed here. The water column was typically sampled from close to the bottom at stations on the shelf where depths were less than 1000 m, or to 1000m at stations off the shelf where depths were often from 3000 to 4000 m. Nets 1 through 8 sampled from various depth intervals to the surface with smaller strata near the surface. Several tows targeted krill swarms by towing in a single strata. Approximate locations of broadscale study stations are shown in Figs. 1-4 (#Figure1). Zooplankton samples were immediately preserved in 5% buffered formalin solution. In 2006, the samples were sent to the Atlantic Reference Centre, Huntsman Marine Science Centre (http://www.huntsmanmarine.ca/research_menu.shtml), St. Andrews, New Brunswick, Canada to be sorted. All the large organisms (>15 mm) in the sample were removed and identified to taxa. The sample was then split to about 100 individuals of euphausiids. All euphausiids in the split were identified to species and life history stage. Next, the sample was split to about 100 individuals of copepods. Copepods were identified to species and life history stage (female, male, copepodite V, or other copepodite). All other zooplankton in the split were identified to taxa and counted. For the Euchaetidae, we followed the designation of Park (1994) who ascribed the Antarctic species to the genus Paraeuchaeta. This data object ("zooabund_nbp") reports the counts of zooplankton per subsample/split by taxa and life stage or size class. The companion data object "zooabund_lmg" reports similar for the MOCNESS samples collected on the L.M. Gould cruises and data object "krill" reports the abundance of each euphausiid species by life stage and size class, also on the L. M. Gould. Greenwich Mean Time was local time + 4 hours. See companion data files: 1. Zooplankton biovolume values from MOCNESS tows (http://globec.whoi.edu/jg/serv/globec/soglobec/mocness_biovols_rs.html0{dir=globec.whoi.edu/jg/dir/globec/soglobec/,info=globec.whoi.edu/jg/info/globec/soglobec/mocness_biovols}) - this data set is derived from displacement volume measurements and dry weight conversion calculations from the same set of samples as the above data. 2. Zooplankton Abundance and biomass from MOCNESS nets using silhouette analysis (http://globec.whoi.edu/jg/serv/globec/soglobec/zoo_moc.html0{dir=globec.whoi.edu/jg/dir/globec/soglobec/,info=globec.whoi.edu:80/jg/info/globec/soglobec/zoo_moc}?) NB Palmer, austral fall & winter of 2001 & 2002 - Biomass (wet weight) and abundance were determined principally by silhouette digitization of taxa lengths and conversion to equivalent wet weights according to the equations and methods adapted from Davis and Wiebe (1985) and Wiebe et al. (2004). Contact Information: Net sample collections: Carin Ashjian (mailto:cashjian@whoi.edu), Peter Wiebe (mailto:pwiebe@whoi.edu), Nancy Copley (mailto:ncopley@whoi.edu), Phil Alatalo (mailto:palatalo@whoi.edu) at Woods Hole Oceanographic Inst. Sample Analyses: Atlantic Reference Centre (http://www.huntsmanmarine.ca/arc.shtml) (ARC), located in St. Andrews, New Brunswick, Canada under the supervision of Dr. Gerhard Pohle (mailto:ARC@mar.dfo-mpo.gc.ca). Reference: Davis, C.S., Wiebe, P.H., 1985. Macrozooplankton biomass in a warm-core Gulf Stream ring: Time series changes in size structure, taxonomic composition, and vertical distribution. Journal of Geophysical Research 90, 8871-8882. Park, T. 1994. Geographic distribution of the bathypelagic genus Paraeuchaeta (Copepoda, Calanoida), Hydrobiologia 292/293, 317-332. Wiebe, P.H., K.H. Burt, S. H. Boyd, A.W. Morton, 1976. The multiple opening/closing net and environmental sensing system for sampling zooplankton. Journal of Marine Research, 34(3): 313-326. Wiebe, P.H., C. J. Ashjian, S. M. Gallager, C. S. Davis, G. L. Lawson, and N. J. Copley. 2004. Using a high powered strobe light to increase the catch of Antarctic krill. Marine Biology. 144(3): 493 - 502. (http://globec.whoi.edu/images/NBP0103_TowPositions.png) Fig. 1. NBP-0103: Locations for the oblique MOCNESS tows taken in austral fall 2001 as part of the broad-scale survey (solid dots) and the horizontal tows taken in krill patches in Marguerite Bay (asterisks). (http://globec.whoi.edu/images/NBP0104_TowPositions.png) Fig. 2. NBP-0104: Locations for the oblique MOCNESS tows taken in austral winter 2001 as part of the broad-scale survey. (http://globec.whoi.edu/images/NBP0202_TowPositions.png) Fig. 3. NBP-0202: Locations for the oblique MOCNESS tows taken in austral fall 2002 as part of the broad-scale survey. (http://globec.whoi.edu/images/NBP0204_TowPositions.png) Fig. 4. NBP-0204: Locations for the oblique MOCNESS tows taken in austral winter 2002 as part of the broad-scale survey. last updated: 12 Sept. 2006; gfh

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