Zooplankton density for all samples collected from Toolik Lake and lakes near the Toolik Field Station, Arctic LTER 2003 - 2011.

Abstract: 

Zooplankton density,were taken with a 30 cm diameter plankton net with 156 um mesh plankton netting, for all samples collected from Toolik Lake and lakes near the Toolik Field Station, Arctic LTER from 2003 - 2010

Project Keywords: 

Data set ID: 

10272

EML revision ID: 

6

Short name: 

2003-2011ArcLTERZoops

DOI: 

10.6073/pasta/2af1397f7816583e0f8f5cd0baf98477
People

Keywords: 

Arctic LTER keywords: 

Taxa: 

Dates

Date Range: 

Wednesday, June 18, 2003 to Wednesday, August 10, 2011

Publication Date: 

Monday, December 12, 2005

Methods: 

The samples were taken with a 30 cm diameter plankton net with 156 um mesh plankton netting. In almost all cases replicate vertical tows were taken with the length varying on the depth of the lake. Once on the lake the net is slowly lowered being sure that it goes down open side up, stopping briefly at the depth of the tow and then at about a meter per second pulling the net to the surface. The contents of the net are washed down until it will fill about half the sample bottle. It is then emptied into the labeled sample bottle. The samples were preserved in an alcohol/formalin solution and stored in 250 ml Nalgene bottles. The samples were counted by taking a subsample of 1 or 2 mL from the bottle and enumerating all zooplankton by species using a M-5 stereomicroscope. If less than 10 individuals of any taxon were recorded in the sample, the entire sample was enumerated for that taxon.
Samples were collected by members of the laboratory of W. John O'Brien from 2003-2008. From 2009-2011 samples were collected by member of the laboratory of Chris Luecke. All samples were counted and enumerated by Shannon Babb, Katie Fisher, or Heather Gooding at Utah State University.

In the laboratory, the samples were counted by taking a subsample of 1 or 2 mL from the bottle and enumerating all zooplankton by species using a stereomicroscope at between 5x and 16x. Rinse preservative from samples in small mesh (<156 micron) funnel. Pour all of sample into a large petri dish to scan for large, rare critters (Chaoborus, amphipods, insects). Add these counts to count sheet under total sample. Pour the sample into a larger metered container. Collect a subsample (1 ml out of 100 ml is common). Place the subsample into a counting tray. Count all of the individuals by taxa. Count two additional subsamples (don’t need additional measurements, but try to get a total of 10 individuals measured. All samples were counted and enumerated by Shannon Babb, Katie Fisher, or Heather Gooding.

Sites sampled.

Download a comma delimited (csv) or Excel file (includes metadata and data sheets).

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Variables Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)
Site
  • Label: Site
  • Definition: Arctic LTER site
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Date
  • Label: Date
  • Definition: Date of sample collection
  • Type: Date/time
  • Date format: DD-MMM-YYYY
  • Missing values: None specified
Depth of tow
  • Label: Depth of tow
  • Definition: Depth of vertical tow of 0.3 m diameter plankton net
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Station number
  • Label: Station number
  • Definition: Station number in Lake
  • Type: Nominal
  • Missing values: None specified
Daphnia midd
  • Label: Daphnia midd
  • Definition: Density of Daphnia middendorffiana in vertical tow
  • Type: Physical quantity
  • Unit: numberPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Daphnia long
  • Label: Daphnia long
  • Definition: Density of Daphnia longeremis in vertical tow
  • Type: Physical quantity
  • Unit: numberPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Holopedium
  • Label: Holopedium
  • Definition: Density of Holopedium gibberum
  • Type: Physical quantity
  • Unit: numberPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Bosmina
  • Label: Bosmina
  • Definition: Density of Bosmina longerostris in vertical tow
  • Type: Physical quantity
  • Unit: numberPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Cyclops
  • Label: Cyclops
  • Definition: Density of Cyclops scutifer in vertical tow
  • Type: Physical quantity
  • Unit: numberPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Diaptomus
  • Label: Diaptomus
  • Definition: Density of Diaptomus pribilofensis in vertical tow
  • Type: Physical quantity
  • Unit: numberPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Heterocope
  • Label: Heterocope
  • Definition: Density of Heterocope septentrionalis in vertical tow
  • Type: Physical quantity
  • Unit: numberPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified