Published on
McMurdo Dry Valleys LTER
(
https://mcm.lternet.edu
)
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:
January 1, 1992
to
December 31, 2001
Dataset(s)
Variables (click to expand):
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
File:
LIMNO_PHYTO_DENSITY_SUMMER.csv
(326.74 KB)
Short name:
phytplkt
Dataset ID:
48
People
Principal Investigator(s):
Diane M. McKnight
Contact:
McMurdo Dry Valleys LTER
Associated Personnel:
Data Manager
Inigo San Gil
Related
Related publications:
Phytoplankton population dynamics in perennially ice-covered Lake Fryxell, Antarctica
Source URL:
https://mcm.lternet.edu/content/summer-phytoplankton-densities-1992-2001