Zooplankton density for lake samples collected near Toolik Lake Arctic LTER in the summer of 1977

Abstract: 

Zooplankton density in number per liter for all samples collected from arctic lakes near Toolik Lake Field Station (Arctic LTER) in the summer of 1977.

Project Keywords: 

Data set ID: 

944

EML revision ID: 

6

Short name: 

1977ArcLTER_tlZoops
People

Keywords: 

Arctic LTER keywords: 

Dates

Date Range: 

Sunday, May 1, 1977 to Thursday, September 1, 1977

Publication Date: 

Wednesday, December 12, 1979

Methods: 

The samples were taken with a 30 cm diameter plankton net with 335 um mesh plankton netting. In almost all cases replicate vertical tows were taken with the length varying on the depth of the lake. The samples were preserved in an alcohol/formalin solution and stored in 250 ml Nalgene bottles. The samples were counted by taking a sub-sample of 1 or 2 ml from the bottle and enumerating all zooplankton by species using a M-5 steromicroscope. The entire sample was surveyed for the 3 large species- D. middendorffiana, Heterocope, and Holopedium. All of the samples were counted and enumerated by Sun Yong.

Reference Citations: None relavant to this particular data

Sampling Description.

Only Toolik Lake was sampled during the summer
1977. The data file incorrectly indicates that the samples were vertical
tows. What the data represent is the density of zooplankton collected with
a 120 liter Schindler-Patalas plankton trap taken out at the main station.
Depending upon the depth at the time of sampling, samples were taken
every 2 meters starting at 1 m down to the bottom, which varied from
19 to 13 meter de

SITE 100, Treatment none Type Tow Schindler-Patalas plankton trap Depth every 2 meters DATE weekly pending upon where we anchored.

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.)
Lake
  • Label: Lake
  • Definition: Lake name
  • Type: Nominal
  • Missing values: None specified
Site Code
  • Label: Site Code
  • Definition: Arctic LTER site code
  • Type: Nominal
  • Missing values: None specified
Treatment
  • Label: Treatment
  • Definition: Treatment
  • Type: Nominal
  • Missing values: None specified
Tow type
  • Label: Tow type
  • Definition: Type of tow (vertical or sweep)
  • Type: Nominal
  • Missing values: None specified
Tow Length (m)
  • Label: Tow Length (m)
  • Definition: Length of tow in meters
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Depth (m)
  • Label: Depth (m)
  • Definition: Depth in meters
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Date
  • Label: Date
  • Definition: Date of tow
  • Type: Date/time
  • Date format: dd-mmm-yyyy
  • Missing values:
    • . = Missing or Not Measured
D. midd
  • Label: D. midd
  • Definition: Daphnia middendorfiana (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
D. long
  • Label: D. long
  • Definition: Daphnia longiremis (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Bosmina
  • Label: Bosmina
  • Definition: Bosmina longirostris (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Holo
  • Label: Holo
  • Definition: Holopedium gibberum (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Heter
  • Label: Heter
  • Definition: Heterocope septentrionalis (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
D. prib
  • Label: D. prib
  • Definition: Diaptomus pribilofensis (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
C. scutt
  • Label: C. scutt
  • Definition: Cyclops scutifer (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
P. ped
  • Label: P. ped
  • Definition: Polyphemus pedunuclus (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
D. pulex
  • Label: D. pulex
  • Definition: Daphnia pulex (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Eurycercus
  • Label: Eurycercus
  • Definition: Eurycercus (number per liter)
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Extra
  • Label: Extra
  • Definition: Other species (number per liter)
  • Type: Nominal
  • Missing values: None specified
Comments
  • Label: Comments
  • Definition: Notes about data
  • Type: Nominal
  • Missing values: None specified