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:	98hophyin
Dataset Title:	Identification of taxa, counts, biomass and carbon biomass calculations for phytoplankton and ciliates from Toolik Lake Inlet surface water, 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 Inlet surface water, 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	98hophyin
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
ABUNDANCE    Number per liter
BIOMASS      ug per liter
C BIOMASS    ug carbon per liter
(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