Summer Phytoplankton Densities 1992-2001

Summary

Abstract: 

  Phytoplankton were collected over four austral summers (1991-92 through1994-95) to examine seasonal and annual fluctuation in species composition and biovolume in Lakes Fryxell, Hoare, West Lake Bonney, and East Lake Bonney. All of these lakes are perennially ice-covered lakes located in the Dry Valleys of South Victoria Land, Antarctica.
     
 The phytoplankton consisted primarily of cryptophyte and chlorophyte flagellates, and filamentous cyanobacteria. Some common taxa were vertically stratified (Oscillatoria limnetica, Phormidium angustissimum, Pyramimonas sp., Oscillatoria sp.), while others showed no distinct vertical stratification (Chlamydomonas subcaudata, Cryptomonas sp.). The stratification of the phytoplankton reflects the gradients of nutrients and light, and the stability of the water column.

Date Range: 

Wednesday, January 1, 1992 to Monday, December 31, 2001

Variables: 

DATASET_CODE
  • Label:
  • Definition: Code to ID the data table
  • Type: Nominal
  • Missing values: None specified
LIMNO_RUN
  • Label:
  • Definition: Code for lake's sampling location and date
  • Type: Nominal
  • Missing values: None specified
LOCATION NAME
  • Label:
  • Definition: Name of lake where measurement was made
  • Type: Nominal
  • Missing values: None specified
LOCATION CODE
  • Label:
  • Definition: Code for site where measurement was made
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label:
  • Definition: Date on which sample was gathered
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values: None specified
DEPTH (m)
  • Label:
  • Definition: Distance below ice from which sample was drawn
  • Type: Physical quantity
  • Unit: meter
  • Maximum: 60
  • Minimum: 1
  • Precision: 1
  • Missing values:
    • Required entry = None given
PHYLUM
  • Label:
  • Definition: None
  • Type: Nominal
  • Missing values: None specified
SPECIES
  • Label:
  • Definition: None
  • Type: Nominal
  • Missing values: None specified
DENSITY (cells/mL)
  • Label:
  • Definition: Density (cells/mL)
  • Type: Physical quantity
  • Unit: numbercells/milliliter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 1
  • Missing values:
    • Null = None given
FILE NAME
  • Label:
  • Definition: Name of file in which data was submitted
  • Type: Nominal
  • Missing values: None specified
DEPTH MASL
  • Label:
  • Definition: Depth referred to the Sea level.
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 1
  • Missing values: None specified

Short name: 

phytplkt

Data set ID: 

48
Published in the EDI Data Repository

Data Citation: 

Mcknight, D. 2014. McMurdo Dry Valleys LTER: Summer Phytoplankton Densities 1992-2001. Environmental Data Initiative. DOI: 10.6073/pasta/51f32c2529c4fbb78ef0322ac30aa705. Dataset accessed 18 August 2019.
People

Principal Investigator(s): 

Contact: 

Associated Personnel: 

Data Manager