Phytoplankton water column profiles in Lake Bonney, Antarctica from 2004 to 2015

Summary

Abstract: 

Lake Bonney (McMurdo Dry Valleys, east Antarctica) represents a year-round refugia for life adapted to extreme conditions. Lake level has risen by more than 3 m since 2004, but impacts of rapid lake level rise on phytoplankton community structure is also poorly understood. From 2004 to 2015, in concert with the summer limnological samplings, an in situ submersible spectrofluorometer (bbe FluoroProbe) was used to profile phytoplankton throughout the water columns of east and west lobes Lake Bonney to quantify the vertical structure of four functional algal groups (green algae, brown/mixed algae, cryptophytes, cyanobacteria). Our findings showed that phytoplankton communities were differentially impacted by physical and chemical factors over long-term vs. seasonal time scales. Following a summer of rapid lake level rise (2010-11), an increase in depth integrated chlorophyll a (chl-a) occurred in Lake Bonney caused by stimulation of photoautotrophic green algae. Collectively our data reveal that phytoplankton groups possessing variable trophic abilities are differentially competitive during seasonal and long-term time scales owing to periods of higher nutrients (photoautotrophs) vs. light/energy limitation (mixotrophs).

Date Range: 

December 13, 2004 to January 16, 2015
Data Citation
Patriarche, J., Priscu, J., Takacs-vesbach, C., Winslow, L., Myers, K.F., Buelow, H., Morgan-kiss, R., Doran, P.T. 2019. McMurdo Dry Valleys LTER: Phytoplankton water column profiles in Lake Bonney, Antarctica from 2004 to 2015. Environmental Data Initiative. DOI: 10.6073/pasta/961988b61f4deed59d18980287bf65b0. Dataset accessed 13 December 2019.
Dataset(s)

Variables (click to expand): 

DATASET_CODE
  • Label: Dataset code
  • Definition: Internal dataset code.
  • Type: Nominal
  • Missing values: None specified
SAMPLE_ID
  • Label: Sample ID
  • Definition: Sample identification code
  • Type: Nominal
  • Missing values: None specified
LOCATION_NAME
  • Label: Location
  • Definition: Location of sample
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date
  • Definition: Date sample was collected
  • Type: Date/time
  • Date format: MM/DD/YYYY
  • Missing values: None specified
DEPTH
  • Label: Depth
  • Definition: Depth sample was taken.
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CYANOBACTERIA
  • Label: Cyanobacteria
  • Definition: Calculated concentration of Cyanobacteria at fluorescence value of 610 nm, measured as Chlorophyll-a.
  • Type: Physical quantity
  • Unit: microGramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CRYPTOPHYTES
  • Label: Cryptophytes
  • Definition: Calculated concentration of Cryptophytes at fluorescence value of 570 nm, measured as Chlorophyll-a.
  • Type: Physical quantity
  • Unit: microGramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
BROWN_MIXED_ALGAE
  • Label: Brown/Mixed Algae
  • Definition: Calculated concentration of Brown/Mixed Algae at fluorescence value of 525 nm, measured as Chlorophyll-a.
  • Type: Physical quantity
  • Unit: microGramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
GREEN_ALGAE
  • Label: Green Algae
  • Definition: Calculated concentration of Green Algae at fluorescence value of 470 nm, measured as Chlorophyll-a.
  • Type: Physical quantity
  • Unit: microGramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

File: 

...or query the dataset by variables and dates of interest:

Short name: 

LIMNO_PHYTO_PROFILE

Dataset ID: 

76