Sub-ice algal assemblages of the Barents Sea: Species compostion, chemical composition, and growth rates 1986 - 1988
Entry ID: ArcOD_2008I4

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Summary
Abstract: This dataset describes ice algae (10 species; 38 rows) of the Barents Sea studied from 1986 to 1988. With a few exceptions, the ice algal assemblages were dominated by pennate diatoms. From March to early June there was a transition from a mixed population of both centric and pennate diatoms at the start into a well developed Nitzschia frigida assemblage. Nutrients in ice-covered regions were high in spring, and high N/C and protein/carbohydrate ratios indicated no nutrient deficiency in the ice algae. The N/P ratios were lower than 15, but comparable to ratios of three ice algae species grown in culture at -0.5 C and various light conditions. The Si/N ratios were lower than corresponding ratios from the Canadian Arctic and the Anarctic. The chemical composition revealed that silicate limited growth cannot be excluded. The cells were heavily shade-adapted the entire spring season, with high Chl/C ratios (0.045-0.084), comparable to the cultures growing at low irradiances. The growth rates in the cultures peaked at 50 ╬╝mol m-2 s-1 with maximum rates of 0.6-0.8 div. day-1, both for 12 and 24 h day lengths. The low growth rates for the May assemblages (max 0.20 div. day-1) indicated strong light limitation by self-shading. Adaptation experiments showed that some ice algae are highly adaptable, while others are not able to adjust by high irradiances, and this may affect the distribution in the field.

Purpose: These data are from a survey of the conditions and compositions of sub-ice algae in the Barents Sea.

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Parent DIF
This data set description is a member of a collection. The collection is described in
ArcOD


Geographic Coverage
 N: 81.5 S: 75.2666  E: -32.9833  W: -21.4166

Data Set Citation
Dataset Originator/Creator: Else Nost Hegseth
Dataset Title: Sub-ice algal assemblages of the Barents Sea: Species compostion, chemical composition, and growth rates 1986 - 1988
Dataset Series Name: Polar Ecology
Dataset Release Date: 1992
Issue Identification: 12 (1992): 485-496
Data Presentation Form: document
Online Resource: http://ak.aoos.org/ArcOD/data_table.php


Temporal Coverage
Start Date: 1986-04-05
Stop Date: 1988-09-15


Location Keywords
OCEAN > ARCTIC OCEAN
OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > SVALBARD AND JAN MAYEN
CONTINENT > EUROPE > NORTHERN EUROPE > SCANDINAVIA > NORWAY
GEOGRAPHIC REGION > ARCTIC
GEOGRAPHIC REGION > POLAR
OCEAN > ARCTIC OCEAN > BARENTS SEA


Science Keywords
BIOLOGICAL CLASSIFICATION >PLANTS >MICROALGAE >DIATOMS
BIOLOGICAL CLASSIFICATION >PLANTS >MACROALGAE (SEAWEEDS)    [Definition]


ISO Topic Category
BIOTA
OCEANS


Platform
SHIPS    [Information]


Instrument
CORING DEVICES    [Information]
PLANKTON NETS    [Information]


Project
OBIS >OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM    [Information]
ARCOD >ARCTIC OCEAN BIODIVERSITY    [Information]
COML >CENSUS OF MARINE LIFE    [Information]


Quality
ATTRIBUTE ACCURACY REPORT: NASpatial accuracy unknown. Ask authors for details.



LOGICAL CONSISTENCY REPORT: Samples in September were collected with aerial assistance, rest by diving based from a ship.


PROCESS DESCRIPTION: Added AOOS/IOOS core variables. Added ArcOD archive information. Changed "scientificnameauthors" to "scientificnameauthor" to match data csv and obis.xml


Access Constraints
None


Use Constraints
Although these data have been processed successfully on a computer system at the University of Alaska and ArcOD, 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.


Keywords
abundance
species composition
algal assemblages
growth rates
sub-ice
Hopen bank
Hopen depths
Svalbard bank
King Karls Island
White Island
Central bank


Data Set Progress
COMPLETE


Originating Center
Alaska Ocean Observing System


Data Center
International Ocean Biogeographic Information System    [Information]
Data Center URL: http://www.iobis.org/

Data Center Personnel
Name: EDWARD VANDEN BERGHE
Phone: (732) 932-6555 x 565
Fax: (732) 932-8578
Email: evberghe at iobis.org
Contact Address:
Institute of Marine and Coastal Sciences
Rutgers University
71 Dudley Road
City: New Brunswick
Province or State: NJ
Postal Code: 08901-8521
Country: USA


Alaska Ocean Observing System, School of Fisheries and Ocean Sciences, University of Alaska - Fairbanks    [Information]
Data Center URL: http://www.aoos.org/

Data Center Personnel
Name: ROB CERMAK
Phone: (907) 474-7948
Email: cermak at sfos.uaf.edu
Contact Address:
Alaska Ocean Observing System
School of Fisheries and Ocean Sciences
University of Alaska Fairbanks
PO Box 757200
City: Fairbanks
Province or State: AK
Postal Code: 99775-7220
Country: USA



Distribution
Distribution_Format: XLS
Fees: none


Personnel
ELSE NOST HEGSETH
Role: INVESTIGATOR
Contact Address:
Dramsveien 201
The Norwegian College of Fishery Science, University of Tromsoe
City: Tromsoe
Province or State: Norway
Postal Code: N-9000
Country: Norway


FALK HUETTMANN
Role: TECHNICAL CONTACT
Phone: +01-907-4747882
Fax: +01-907 4746967
Email: fhuettmann at alaska.edu
Contact Address:
419 Irving I, PO Box 757000
City: Fairbanks
Province or State: AK
Postal Code: 99775-7000
Country: USA


ALICIA ALEMAN
Role: DIF AUTHOR
Email: alicia.m.aleman at nasa.gov
Contact Address:
Goddard Space Flight Center
Code 610.2
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA



Creation and Review Dates
DIF Creation Date: 2008-01-11
Last DIF Revision Date: 2010-02-24

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