Nutrient addition incubation experiments using sediments from supraglacial streams in Taylor Valley, Antarctica, December 2017

Summary

Abstract: 

We used sediment incubations to quantify and compare nutrient uptake rates from biota living in sediment across glaciers in Taylor Valley, Antarctica. Hughes Glacier is located towards the polar plateau on the western edge of the valley and flows from the southern Kukri Hills north into the valley. Canada and Commonwealth glaciers flow south into the valley from the Asgard range. Commonwealth glacier is located closest to the ocean on the east end of the valley. Canada glacier is located mid-valley, between Hughes and Commonwealth glaciers. Sediment was brought to the lab and incubated with added nutrient solutions. Solutions were then analyzed to determine change in nutrient concentration. 

Date Range: 

December 15, 2017 to December 17, 2017
Data Citation
Bergstrom, A.J., Gooseff, M.N. 2020. McMurdo Dry Valleys LTER: Nutrient addition incubation experiments using sediments from supraglacial streams in Taylor Valley, Antarctica, December 2017. Environmental Data Initiative. DOI: 10.6073/pasta/2afe506b7741c0ce5dd90c2f685910f5. Dataset accessed 8 July 2020.
Dataset(s)

Description: 

Nutrient Addition in Supraglacial Sediments

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 unique identifier.
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date
  • Definition: Date on which incubation was conducted.
  • Type: Date/time
  • Date format: MM/DD/YYYY
  • Missing values:
    • BLANK = missing
DURATION
  • Label: Duration
  • Definition: Duration of the incubation in decimal hours, from the time nutrient solution was added to the time of filtering.
  • Type: Physical quantity
  • Unit: decimalTime
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
GLACIER
  • Label: Glacier
  • Definition: Name of the glacier (i.e., Canada, Commonwealth, or Hughes) from which the sample was collected.
  • Type: Nominal
  • Missing values: None specified
AUTOCLAVED
  • Label: Autoclaved
  • Definition: Whether or not the sample was autoclaved.
  • Type: Code list
  • Codes:
    • Yes = Sample was autoclaved.
    • No = Sample was not autoclaved (i.e., live).
  • Missing values: None specified
TREATMENT
  • Label: Treatment
  • Definition: Nutrient solution or deionized water (DIW) added to sample. Options include NO3, NH4, PO4, NO3+PO4, DIW control, or KCl.
  • Type: Nominal
  • Missing values: None specified
PO4_MG_L
  • Label: Phosphorous concentration
  • Definition: Phosphorus concentration of solution after incubation.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
NO3_MG_L
  • Label: Nitrate concentration
  • Definition: Nitrate concentration of the solution after incubation. Any value of 0 is below the detection limit of the instrument.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
NH4_MG_L
  • Label: Ammonium concentration
  • Definition: Ammonium concentration of the solution after incubation. Any value of 0 is below the detection limit of the instrument.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
SED_DRY_MASS_G
  • Label: Sediment dry mass
  • Definition: Dry mass of sediment from incubation used for loss on ignition (LOI) analysis.
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
SED_DRY_MASS_LOI_G
  • Label: Sediment dry mass after ignition
  • Definition: Mass loss of sediment after burning in a muffle furnace (i.e., mass loss on ignition (LOI) ).
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
VOL_FILTERED_ML
  • Label: Volume of solution filtered
  • Definition: Volume of solution filtered from incubation flask.
  • Type: Physical quantity
  • Unit: milliliter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
FILTER_MASS_LOI_G
  • Label: Filter mass after ignition
  • Definition: Mass lost from filter after burning in a muffle furnace (i.e., mass loss on ignition (LOI) ).
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing

File: 

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

Short name: 

GLACIER_SUPRA_MESOCOSM

Dataset ID: 

2019
People

Principal Investigator(s): 

Contact: 

Associated Personnel: 

Field Crew
Lab Technician
Data Manager