Taylor Glacier Blood Falls Geomicrobiology

Summary

Abstract: 

Blood Falls, a subglacial discharge from the Taylor Glacier, Antarctica provides an example of the diverse physical and chemical habitats available for life in the polar desert of the McMurdo Dry Valleys. Geochemical analysis shows that Blood Falls outflow resembles concentrated seawater remnant from the Pliocene intrusion of marine waters combined with products of weathering. The result is an iron-rich, salty seep at the terminus of Taylor Glacier, which is subject to episodic releases into permanently ice-covered Lake Bonney. Blood Falls influences the geochemistry of Lake Bonney, and provides organic carbon and viable microbes to the lake system. Presented here is the first data on the geobiology of Blood Falls, and relate it to the evolutionary history of this unique environment. The novel geological evolution of this subglacial environment makes Blood Falls an important site for the study of metabolic strategies in subglacial environments, and the impact of subglacial efflux on associated lake ecosystems.

Date Range: 

Wednesday, September 1, 1999 to Tuesday, March 16, 2004

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Variables: 

Sample Location
  • Label: Sample Location
  • Definition: Sample Location
  • Type: Nominal
  • Missing values: None specified
pH
  • Label: pH
  • Definition: pH
  • Type: Physical quantity
  • Unit: pH
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = none detected or not available
DO (uM O2)
  • Label: DO (µM O2)
  • Definition: Dissolved oxygen (DO) was determined by Winkler titration.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Eh (mV)
  • Label: Eh (mV)
  • Definition: Conductivity was measured at 1-meter depth intervals in the west lobe of Lake Bonney using a Seabird SBE-25 conductivity temperature depth (CTD) sensor (Sea-Bird Electronics, Inc., Bellevue, Washington).
  • Type: Physical quantity
  • Unit: millivolt
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not detected or not available
DIC (uM)
  • Label: DIC (µM)
  • Definition: Dissolved inorganic carbon (DIC) was measured by infrared gas analysis on acid sparged samples.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = none detected or not available
DIN (uM)
  • Label: DIN (µM)
  • Definition: Dissolved inorganic nitrogen (DIN) was reported as the summation of nitrate, nitrite and ammonium (DIN = NO3-+ NO2-+ NH4+).
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not determined or not available
SRP (uM)
  • Label: SRP (µM)
  • Definition: Soluble reactive phosphorus (SRP) was determined on 10 ml samples with the antimony-molybdate method (Standard Methods, 1992), absorbance was read in a 10 cm cell with a Beckman DU-640 spectrophotometer.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = none detected or not available
DIN:SRP (uM)
  • Label: DIN:SRP
  • Definition: The ratio of DIN to SRP. Useful for looking a phosphorus deficiency.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • ND = none detected or not available
DOC (uM C)
  • Label: DOC (µM C)
  • Definition: Dissolved organic carbon (DOC) was measured on filtered (25mm Whatman GF/F), acidified (HCl to pH~2-3) samples with a Shimadzu 5000 TOC analyzer.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not detected or not available
CHL (ug per L)
  • Label: CHL (µg per L)
  • Definition: Chlorophyll-a (CHL) was extracted into 90% acetone for 24 h at <0 °C in the dark from particles collected on a Whatman GF/F filter, and the subsequent concentration was determined fluorometrically.
  • Type: Physical quantity
  • Unit: microgramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = none detected or not available
Bacteria (cells per mL)
  • Label: Bacteria (10^4 cells per mL)
  • Definition: Environmental (in situ) cell abundance as determined on 0.2 μm-filtered samples.
  • Type: Physical quantity
  • Unit: cellsPERmL
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = none detected or not available

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Variables: 

DATASET_CODE
  • Label: DATASET_CODE
  • Definition: Code to designate the table name
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date
  • Definition: Date the sample was collected.
  • Type: Date/time
  • Date format: MM/DD/YYYY
  • Missing values: None specified
Temperature
  • Label: Temperature
  • Definition: Temperature in C
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
3H-Thymidine incorporation
  • Label: 3H-labeld Thymidine incorporation
  • Definition: Nanomol per doubling time of incorporated 3H-labeld Thymidine
  • Type: Physical quantity
  • Unit: nM d-1 x 10-3
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
3H-Leucine incorporation
  • Label: 3H-labeld Leucine incorporation
  • Definition: Nanomol per doubling time of incorporated 3H-labeld Leucine
  • Type: Physical quantity
  • Unit: nM d-1
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Doubling time
  • Label:
  • Definition: Doubling time, in whole numbers.
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

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Variables: 

DATE_TIME
  • Label: Collection Date
  • Definition: Collection Date
  • Type: Date/time
  • Date format: MM/DD/YYYY
  • Missing values: None specified
Temp
  • Label: Temperature
  • Definition: Temperature
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not available
pH
  • Label: pH
  • Definition: pH as measured with a calibrated Beckman 12 pH meter
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = Not available
DOC
  • Label: DOC (µM)
  • Definition: Dissolved organic carbon (DOC) was measured on filtered (25 mm Whatman GF/F) acidified samples with a Shimadzu 5000 TOC analyzer.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not available
DIC
  • Label: DIC (mM)
  • Definition: Dissolved inorganic carbon (DIC) was measured by infrared gas analysis on acid sparged samples.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not available
DO
  • Label: DO (mM)
  • Definition: Dissolved oxygen (DO) was determined by Winkler titration.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not available
Cells
  • Label: Cells (1x10^5)
  • Definition: Cell counts of 10mL outflow samples
  • Type: Physical quantity
  • Unit: counts
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not available
%live
  • Label: %live
  • Definition: Percentage live cells in outflow samples
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not available
Cl-
  • Label: Cl- (mM)
  • Definition: Cl- concentration
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not available
SO42
  • Label: SO4 2- (mM)
  • Definition: SO4 2-
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
SO4:Cl
  • Label: SO4:Cl
  • Definition: The ratio of SO4 to Cl
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • NULL = not available

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Variables: 

Sample
  • Label: Sample
  • Definition: Sample
  • Type: Nominal
  • Missing values: None specified
pH
  • Label: pH
  • Definition: pH
  • Type: Physical quantity
  • Unit: pH
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
Cell density
  • Label: Cell density
  • Definition: Cell density
  • Type: Physical quantity
  • Unit: cells per mL
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
CFUs R2A
  • Label: CFUs R2A
  • Definition: Count of colony forming units on R2A media.
  • Type: Physical quantity
  • Unit: count
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
CFUs Mar
  • Label: CFUs Mar
  • Definition: Count of colony forming units on Mar media.
  • Type: Physical quantity
  • Unit: count
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
Fe
  • Label: Fe (µM)
  • Definition: Fe (µM)
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
Chl-a
  • Label: Chl--a (µg/L)
  • Definition: Chlorophyll- a (CHL) was extracted into 90% acetone for 24 h at <0 °C in the dark from particles collected on a Whatman GF/F filter, and the subsequent concentration was determined fluorometrically.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
DIC
  • Label: DIC (mM)
  • Definition: Dissolved inorganic carbon (DIC)as measured by infrared gas analysis on acid sparged samples.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
DO
  • Label: DO (µM)
  • Definition: Dissolved oxygen (DO) was determined by Winkler titration.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
DOC
  • Label: DOC (µM)
  • Definition: Dissolved organic carbon (DOC) was measure on filtered (Whatman GF/F) and acidified samples with a Shimadzu 5000 TOC analyzer.
  • Type: Physical quantity
  • Unit: molarity
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
DIN
  • Label: DIN (µM)
  • Definition: DIN
  • Type: Physical quantity
  • Unit: microMoles
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
Na+
  • Label: Na (mM)
  • Definition: Sodium concentration as measured according to the protocol of Welch et al. (1996).
  • Type: Physical quantity
  • Unit: milliMoles
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
Cl-
  • Label: Cl (mM)
  • Definition: Chloride concentration as measured according to the protocol of Welch et al. (1996).
  • Type: Physical quantity
  • Unit: milliMoles
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not availalbe
SO42-
  • Label: SO42- (mM)
  • Definition: Sulfate concentration as measured according to the protocol of Welch et al. (1996).
  • Type: Physical quantity
  • Unit: milliMoles
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
Ca2+
  • Label: Ca2+ (mM)
  • Definition: Calcium concentration as measured according to the protocol of Welch et al. (1996).
  • Type: Physical quantity
  • Unit: milliMoles
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available
Richness
  • Label: Richness
  • Definition: Richness calculated from the 16S rRNA clone library.
  • Type: Physical quantity
  • Unit: milliMoles
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • na = not available

DOI: 

10.6073/pasta/dc7b513f0ae8a640ef186df53ff02b6c

Short name: 

jillsthesis

Data set ID: 

77
People

Owner/Creator: 

Contact: 

Additional Project roles: 

Associated Researcher
Associated Researcher
Data Manager