Distribution and structure of macrobenthic fauna in the eastern Laptev Sea in relation to environmental factorsEntry ID: ArcOD_2006B8
Abstract: The Laptev Sea still ranks among the less known regions of the world???s ocean. Here, we describe the distribution and composition of macrobenthic communities of the eastern shelf and identify key environmental control factors. Samples were collected from dredge catches carried out at 11 stations at depths between 17 and 44 m in August/September 1993 during the TRANSDRIFT I cruise of the Russian R/V ... ???Ivan Kireev.??? A total of 265 species were identified from the samples, mostly crustaceans (94). Species numbers per station ranged from 30 to 104. Macrobenthic community distribution clearly showed a depth zonation, consisting of a ???Shallow??? zone (<20 m), dominated by the crustaceans -Mysis oculata - (Mysidacea) and -Saduria entomon- (Isopoda) as well as molluscs, an ???Intermediate??? zone (20-30 m), characterised by a clear dominance of the bivalve -Portlandia arctica-, and a ???Deep??? zone (>30 m) with bivalves -P. arctica- and -Nuculoma bellotii- as well as brittle stars -Ophiocten sericeum- and -Ophiura sarsi- being most abundant. According to a correlation analysis between faunal and environmental data, a combination of duration of ice cover and water depth, respectively, showed the highest affinity to macrobenthic distribution. We conclude that the food input to the benthos, which is largely related to ice-cover regime, and the stress due to the pronounced seasonal salinity variability, which is primarily related to water depth, are prime determinants of macrobenthic community distribution and major causes of the prominent depth zonation in the Laptev Sea. Within the depth zones, sediment composition seems to be most significant in controlling the patterns in the distribution of the benthic fauna.
Purpose: The objectives of this study are to (1) describe the macrobenthic distribution patterns in the eastern Laptev Sea, (2) delineate macrobenthic communities by means of multivariate statistics and (3) identify key environmental factors controlling the distribution and composition of macrobenthic fauna.
Data Set Citation
Dataset Originator/Creator: Matthias Steffens
Dataset Title: Distribution and structure of macrobenthic fauna in the eastern Laptev Sea in relation to environmental factors
Dataset Series Name: Polar Biology
Dataset Release Date: 2006
Issue Identification: 29(10):837-848
Other Citation Details: this publication is part of an EThesisOnline 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: 1993-08-16Stop Date: 1993-09-08
OCEANS > MARINE SEDIMENTS > SEDIMENTATION
OCEANS > OCEAN CIRCULATION > FRESH WATER FLUX
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > SALINITY/DENSITY > SALINITY
OCEANS > SEA ICE > ICE EXTENT
OCEANS > SEA ICE > SEA ICE CONCENTRATION
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > ISOPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS > BIVALVES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS
BIOSPHERE > AQUATIC ECOSYSTEMS > BENTHIC HABITAT
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > COMMUNITY STRUCTURE
Quality ATTRIBUTE ACCURACY REPORT: The catchability of the used dredge is not known. The mesh size of the dredge was 5mm. The total catch was processed.
LOGICAL CONSISTENCY REPORT: The same procedures were used at all sites; findings should be consistent.
COMPLETENESS REPORT: The total catch including all taxa was processed (5 replicates at each of the 3 sites).
... HORIZONTAL POSITIONAL ACCURACY REPORT: Sites were identified using GPS
PROCESS DESCRIPTION: Updated from version 1 to version 2.
PROCESS DESCRIPTION: 1. Updated Title from "Missing=TRUE" to "Fram Strait Benthos (IPOE) 1991" the title listed on the data table website is Distributionand structure of macrobenthic fauna in the Eastern Lapteve Sea in relation to environmental factors" 2. Added AOOS/IOOS keywords
PROCESS DATE: 20090401
PROCESS DATE: 20090424
When not provided by authors, taxonomic information was completed using the ITIS Taxon list and is based on quantitative sampling using a dredge. It may not represent a complete list of taxa occurring in the region.
Access Constraints None.
Use Constraints Contacting data owners is recommended for valid interpretation of these data.
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: EXCEL
Email: msteffens at ipoe.uni-kiel.de
Institute for Polar Ecology, Kiel University, Germany Wischhofstr. 1???3, Building 12
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
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 Polar Biology 28: 218-231
Steffens, M; Piepenburg, D; Schmid, M. K. 2006 Distribution and structure of macrobenthic fauna in the eastern Laptev Sea in relation to environmental factors. Polar Biology 29(10):837-848
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2009-04-01
Last DIF Revision Date: 2010-01-21