Weather at Toolik

Arctic LTER Database

Acceptance and utilization of LTER data requires that:

(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:

Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543

Older Metadata: Attribute table not in XML (EML) file

Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	98hophytlk138
Dataset Title:	Identification of taxa, counts, biomass and carbon biomass calculations for phytoplankton and ciliates from Toolik Lake depth profiles (1,3 and 8 m) taken in May and July 1998, Arctic LTER 1998.
Investigator 1:
First Name:	John
Last Name:	Hobbie
Address line 1:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Associate Investigators:	Michele Bahr, MBL; Blomqvist, Cecilia Lindblom, University, of Uppsala, Sweden
Keywords:	phytoplankton, microplankton
Abstract:	Identification of taxa, counts, biomass and carbon biomass calculations for phytoplankton and ciliates from Toolik Lake depth profiles (1,3 and 8 m) taken in May and July 1998.
Contact:	Arctic LTER Information Manager The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole, MA 02543 Phone (508) 289 7496 Email: arc_im@mbl.edu Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File Name	98hophytlk138
Beginning Date	5/1/1998
End Date	9/1/1998
Number of Data Records
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: For Archival Use: DATE RECEIVED: 23 Jan 02 DATA FILE ENTERED BY: DATA FILE VALIDATION: NAME: Neil Bettez DATE:23 Jan 02



RESEARCH LOCATION:
Geographic Description	Toolik Lake, AK
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude
Longitude



TAXONOMIC COVERAGE:
Organisms studied

Methods:	Samples were preserved in Lugol's solution before shipment to Sweden. Identification to the level of taxa was made via light microscopy from known volumes in settling chambers. Reference Citations: Olrik, K., P. Blomqvist, P. Brettum, G. Cronberg, P. Eloranta and E. Herlitz. 1998. Methods for Quantitative Assessment of Phytoplankton in Freshwater, parts I and II. Naturvardsverket, Stockholm. Sampling Description. None

Data Table

Variable    Variable descrip.               Precis./Units  Coded   Missing
(Y/N)    Values
FAMILY       Family of identified species
SPECIES      Taxa of identified species
SIZE         Size of identified species in um
SITE         Site of measurement                               y
DATE         Date sampled                      DD-MMM-YY       n
1mABUNDANCE  Number per liter at 1m depth
3mABUNDANCE  Number per liter at 3m depth
8mABUNDANCE  Number per liter at 8m depth
1mBIOMASS    ug per liter at 1m depth
3mBIOMASS    ug per liter at 3m depth
8mBIOMASS    ug per liter at 8m depth
1mC BIOMASS  ug carbon per liter at 1m depth
3mC BIOMASS  ug carbon per liter at 3m depth
8mC BIOMASS  ug carbon per liter at 8m depth
(12) CALCULATIONS
N (cells/ml) = C*Ae/(n*v*As)
Where
C= counted number of cells in all counting fields
Ae= effective filter area (mm2)
n= number of fields analyzed
v= sample volume corrected for preservative addition
As= area of counting filed (mm2)
Biomass is based on geometric formulas,
e.g., sphere volume V= p/6 x d3
cylinder V= p/4 x d2 x l
ellipsoid V= p/6 x l x a x b
(see reference)
carbon biomass is calculated from volume biomass, where
C= phytoplankton carbon (ug l-1 C)
B= phytoplankton biomass (ug l-1 wet mass)
Cyanophytes               C= B x 0.22
Thecate dinoflagellates   C= B x 0.13
Diatoms                   C= B x 0.11