[Location: Location_Category='OCEAN', Location_Type='ARCTIC OCEAN', Location_Subregion1='CHUKCHI SEA']
Meiofauna in sea ice of the Beaufort Gyre 2002 and 2003Entry ID: ArcOD_2006I1
Abstract: This data set contains the abundance of sea ice meiofauna with additional information on ice thickness, snow depth and chlorophyll concentration. We studied the abundance, biomass and potential ingestion rates of meiofauna in multi-year sea ice (MYI) of the Beaufort Gyre during two icebreaker expeditions in summers 2002 and 2003. Ice cores were taken at a total of ten stations and analyzed for ice ... temperature, salinity, chlorophyll a (Chl a), and ice meiofauna abundances. In 2002, ice was free of snow and covered with melt ponds. In 2003, snow still covered the ice and a slush-layer was found in the ice-water interface. The vertical distribution of Chl a mostly followed C-shaped curves with elevated concentrations at the bottom and top of the ice. Ice meiofauna was mainly restricted to the bottom 10 cm of the ice and was dominated by turbellarians, harpacticoid copepods and nematodes. The meiofauna abundances (range: 8–3,000 individuals m_2) and Chl a concentration (range: 0.1–1.7 mg Chl a m_2) were similar to estimates for MYI of the Transpolar Drift, but about 2 orders of magnitude below coastal fast first-year ice estimates. Calculated potential meiofaunal ingestion rate, based on allometric equations and volume estimates from the literature, was about 1% of published daily algal production rates and was thus unlikely to constrain algal biomass accumulation.
Purpose: We collected sea-ice cores and analyzed them for algal pigment concentration and meiofauna abundance in order to answer the following questions: (a) Has the sea-ice meiofauna disappeared from the Beaufort Sea ice, and if not (b) How does the meiofauna compare to coastal or offshore studies in terms of composition and abundance?
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Data Set Citation
Dataset Originator/Creator: Gradinger et al.
Dataset Title: Meiofauna in sea ice of the Beaufort Gyre 2002 and 2003
Dataset Series Name: Polar Biology
Dataset Release Date: 2005
Issue Identification: 171-184Online 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: 2002-08-13Stop Date: 2003-09-01
CRYOSPHERE > SNOW/ICE > ICE DEPTH/THICKNESS
CRYOSPHERE > SNOW/ICE > SNOW DEPTH
OCEANS > SEA ICE
OCEANS > SEA ICE > SNOW DEPTH
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > COPEPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > FLATWORMS/FLUKES/TAPEWORMS
BIOSPHERE > AQUATIC ECOSYSTEMS > PELAGIC HABITAT
BIOSPHERE > AQUATIC ECOSYSTEMS > MARINE HABITAT
OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL
Quality ATTRIBUTE ACCURACY REPORT: Parameters were collected with the typical accuracies for such kind of studies.
LOGICAL CONSISTENCY REPORT: Samples were collected with consistent methodology on all stations. Same analyses were applied.
COMPLETENESS REPORT: Some metazoan taxa were not identified in detail and summarized as others.
HORIZONTAL POSITIONAL ACCURACY REPORT: contact author, see also cruise reports
VERTICAL POSITIONAL ACCURACY REPORT: contact author, see also cruise report
PROCESS DESCRIPTION: see methods, 1 student and several taxonomists
PROCESS DATE: 1991
Access Constraints No restrictions apply.
Use Constraints 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. Information is not available on species level. Only higher taxonomic ranks were analysed.
ArcOD shall not be held liable for improper or incorrect use of the data ... described and/or contained herein. These data and related graphics (i.e. GIF or JPG format files) are not legal documents and are not intended to be used as such. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data. ArcOD gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from an ArcOD server and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on computer systems at ArcOD, no warranty expressed or implied is made regarding the utility of the data on other systems 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.
Data Set Progress
Distribution Format: MS Access Database
Phone: 1 907 474-7842
P.O.Box 757220 University of Alaska-Fairbanks
Province or State: Alaska
Postal Code: 99775-7220
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
Gradinger, R. 2005 Meiofaunae in the Seaice of Beaufort Gyre 2002 and 2003 Polar Biology 171-184
Graham, C. H., S. Ferrier, F. Huettmann, C. Moritz and A.T. Peterson 2004 New developments in museum-based informatics and applications in biodiversity analysis. Trends in Ecology and Evolution 19:497-503
Creation and Review Dates
DIF Creation Date: 2006-07-01
Last DIF Revision Date: 2010-01-22