Zooplankton in the Laptev Sea and adjacent Nansen Basin during summer, 1993 (Polarstern ARK-IX/4)Entry ID: ArcOD_2007P4
Abstract: Zooplankton composition and distribution were investigated on the Laptev Sea shelf, over the continental slope and in the adjacent deep Nansen Basin during the joint German-Russian expedition ``Arctic 93'' with RV Polarstern and Ivan Kireyev in August/September 1993. In the shelf area, biomass decreased from west to east with the lowest values in the area influenced by the Lena river runoff. A ... gradual increase of biomass from the shallow to the deep area correlated with water depth. Total biomass ranged between 0.1 and 1.5 g m-2 on the shelf and 4.7 and 7.9 g m-2 in the adjacent Nansen Basin. On the shelf Calanus glacialis/finmarchicus dominated overall. The contribution of brackish-water taxa was low in the west, where high salinity and southward currents from the Arctic Basin supported a marine neritic community, but on the southern and eastern Laptev shelf, in the areas of freshwater influence, brackish-water taxa contributed up to 27% of the total biomass. On the slope and in deep areas a few large Arctic copepod species, Calanus glacialis, C. hyperboreus and Metridia longa, composed the bulk of the biomass and determined the pattern of its vertical distribution. The export of Calanus species from the Nansen Basin onto the Laptev shelf appears to be of great importance for the shelf communities. In turn, the eastern outer shelf and slope area of the Laptev Sea are thought to have a pronounced effect on the deep basin, modifying the populations entering the central Arctic.
Purpose: To describe the patterns of distribution and biomass of zooplankton on the Laptev Sea Shelf, continental slope and Nansen Basin in the Arctic Ocean.
Data Set Citation
Dataset Originator/Creator: Kosobokova K.N., Hanssen H., Hirche H.-J., Knickmeier K.
Dataset Title: Zooplankton in the Laptev Sea and adjacent Nansen Basin during summer, 1993 (Polarstern ARK-IX/4)
Dataset Series Name: Polar Biology
Dataset Release Date: 1998
Issue Identification: 19: 63-76
Data Presentation Form: database
Other Citation Details: Composition and distribution of zooplankton in the Laptev Sea and adjacent Nansen Basin during summer, 1993Online Resource: http://ak.aoos.org/ArcOD/data_table.php
This data set description is a member of a collection. The collection is described in
Start Date: 1993-08-27Stop Date: 1993-09-22
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > COPEPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > DECAPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > AMPHIPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > BARNACLES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > OSTRACODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > ISOPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > COMB JELLIES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARROW WORMS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > CNIDARIANS > HYDROZOANS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ECHINODERMS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS > GASTROPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS > BIVALVES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > SEGMENTED WORMS (ANNELIDS)
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > TUNICATES
BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON
Quality ATTRIBUTE ACCURACY REPORT: The animal counts were done according to standard methods: an aliquot (1:2, 1:4, 1:8, 1:16, 1:32) of the samples was counted after fractionation with a Folsom splitter. The error in splitting samples was not assessed. A minimum of 30 individuals of each species and stage was counted in each sample. With regard catchability of the zooplankton, this study followed the ... consensus that a mesh size of 75% of the width of the smallest animal to be sampled is required for quantitative sampling (Gallienne and Robins 2001, J Plankton Res 23:1421–1432). http://plankt.oxfordjournals.org/cgi/content/abstract/23/12/1421 That means the width not the length of an individual is important.
LOGICAL CONSISTENCY REPORT: The same procedure was used at all sites and for all species; findings should be consistent.
COMPLETENESS REPORT: The following species were not in ITIS:
Likely, these are newly described and just not in ITIS, yet.
HORIZONTAL POSITIONAL ACCURACY REPORT: nearest second
These data present a snapshot in time, but are representative for the location and depth where collected. Identification is done where applicable and known; different taxonomies might result into different species names.
Access Constraints None
Use Constraints These data cannot be redistributed to third parties.
Although these data have been processed successfully on a computer system at the University of Alaska, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This ... disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a University of Alaska server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The University of Alaska shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Data Set Progress
Role: TECHNICAL CONTACT
Fax: +01-907 4746967
Email: fhuettmann at alaska.edu
419 Irving I, PO Box 757000
Province or State: AK
Postal Code: 99775-7000
Role: DIF AUTHOR
Email: alicia.m.aleman at nasa.gov
Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
Kosobokova K.N., Hanssen H., Hirche H.-J., Knickmeier K. 1998 Composition and distribution of zooplankton in the Laptev Sea and adjacent Nansen Basin during summer, 1993, Polar Biology 19: 63-76
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2007-05-18
Last DIF Revision Date: 2010-02-25