Southeastern Chukchi Sea (Alaska) epibenthos 1976Entry ID: ArcOD_2006B4
Abstract: Epibenthos of the southeastern Chukchi Sea, inclusive of Kotzebue Sound, was sampled in 1976. Otter trawl, condend, was lined with 31.8mm (1.25"). mesh for retention of fish and epifauna. Crustaceans dominated abundance while echinoderms, mainly sea stars, dominated biomass. Spatial distribution of fauna was determined by cluster analysis. Scavenger-predators were dominant trophic groups,although ... suspension feeders dominated some regions. Unexpected high abundance and biomass under Alaska Coastal Water and factors related to presence and distribution of fauna are discussed. Dissimilarities between the benthic systems of the southeastern and northeastern Chukchi Seas are attributed to more complex water mass and flow patterns in the southern system. Entrained particulate organic carbon disperses through the area to support an abundant and apparently highly productive benthic fauna, which sustains resident and transient populations of demersal fishes and marine mammals. Epibenthos was sampled again in 1998 and, although little change was apparent in community composition, many taxa had higher abundance and biomass than 22 years earlier, a trend similar to findings observed in the northeastern Bering Sea.
Purpose: To assess species composition, abundance, biomass and distribution of epifauna in the southeastern (US sector) Chukchi Sea.
Data Set Citation
Dataset Originator/Creator: Feder HM, Jewett SC, Blanchard A
Dataset Title: Southeastern Chukchi Sea (Alaska) epibenthos 1976
Dataset Series Name: 28: 402-421
Dataset Release Date: 2005
Issue Identification: Polar BiologyOnline 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: 1976-09-05Stop Date: 1976-09-16
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > CNIDARIANS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ECHINODERMS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > SEGMENTED WORMS (ANNELIDS)
BIOSPHERE > AQUATIC ECOSYSTEMS > BENTHIC HABITAT
Quality ATTRIBUTE ACCURACY REPORT: A modified Eastern Otter trawl with a 17m horizontal opening was used. Tows were 30 min in duration at an average speed of 6.5 km h-1. Mesh size unknown. The inherent problem of trawls is to know exactly when the net reached and left the seafloor, because abundance and biomass calculations are based on the trawled area. The exact accuracy is unknown.
LOGICAL CONSISTENCY REPORT: The same procedures were used at all sites and for all species; findings should be consistent.
COMPLETENESS REPORT: Mesh size unknown. The data were taken from 70 stations with confirmed presence and absence reported from those stations.
HORIZONTAL POSITIONAL ACCURACY REPORT: According to navigation system of NOAA ship Miller Freeman in 1976
VERTICAL POSITIONAL ACCURACY REPORT: According to navigation system of NOAA ship Miller Freeman in 1976
PROCESS DESCRIPTION: Catches were sorted on shipboard, given tentative identifications, enumerated, weighed, and fixed in 10% buffered formalin. Organisms mainly comprised epifauna, although some infauna was collected. Epifauna that could not be quantified and infauna were included in the taxa count, but not included in abundance, biomass calculations and multivariate analysis. Abundance and biomass were converted to individuals km-2 and kg km-2, respectively. General comments on distribution of epifauna were not collected quantitatively and some infaunal taxa are included in the results.
PROCESS DATE: at sea
When not provided by taxonomist, taxonomic information was completed using ITIS.
Access Constraints None. Contacting data owners is recommended for valid interpretation of these data.
Use Constraints Do not redistribute to third parties.
ArcOD and the authors of this dataset 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: EXCEL
Phone: 1-907-474 7956
IMS SFOS University of Alaska-Fairbanks PO Box 757220
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
Feder HM, Jewett SC, Blanchard A (2005), Southeastern Chukchi Sea (Alaska) epibenthos, Polar Biology, 28, 402-421
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
Unknown (Unknown), Unknown, Polar Biology, 28, 218-231
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2005-12-06
Last DIF Revision Date: 2011-05-10