Stoichiometry Experiment - CO2

Summary

Abstract: 

Soil communities in the McMurdo Dry Valleys are subject to many limitations, including resource limitations. However, the nutrients that are predominantly limiting to growth and diversity of soil biota are not known. Additionally, landscape history (N deposition, P weathering) and native N and P content (glacial till provenance) may influence the ability of soil communities to respond to nutrient additions or changes in nutrient availability associated with environmental change. Long-term experiments in the Bonney and Fryxell basins have been established with yearly application of aqueous nutrient additions: C, N, P, CN, and CP. Multiple nutrients additions were made at the Redfield Ratio of 106:16:1 (C:N:P). Responses of soil chemistry, CO2 flux, and biota are reported.

Date Range: 

Sunday, January 26, 2003 to Saturday, January 16, 2010

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Variables: 

DATASET_CODE
  • Label:
  • Definition: Unique identifier for the table in the MCM LTER database
  • Type: Nominal
  • Missing values: None specified
BASIN
  • Label:
  • Definition: The lake basin where the soil sample was collected from (Bonney or Fryxell).
  • Type: Code list
  • Codes:
    • Bonney = Lake Bonney Basin
    • Fryxell = Lake Fryxell Basin
  • Missing values: None specified
SAMPLE_ID
  • Label:
  • Definition: The block and treatment combination of the sample. (C) carbon additions as mannitol (N) nitrogen additions as NH4NO3 (P) phosphorus additions as Na3PO4 (CN) carbon and nitrogen additions (CP) carbon and phosphorus additions, (W) water-only additions (U) un-amended plots. The numbers indicated the plot/block number
  • Type: Nominal
  • Missing values: None specified
BLOCK_ID
  • Label:
  • Definition: The block number that the soil sample was collected from.
  • Type: Nominal
  • Missing values: None specified
TREATMENT
  • Label:
  • Definition: The manipulation for a given plot from where the soil was collected.
  • Type: Code list
  • Codes:
    • C = carbon additions as mannitol
    • N = nitrogen additions as NH4NO3
    • P = phosphorus additions as Na3PO4
    • CN = carbon and nitrogen additions
    • CP = carbon and phosphorus additions,
    • W = water-only additions
    • U = un-amended plots.
  • Missing values: None specified
PRE_DATE_TIME
  • Label:
  • Definition: The date and time CO2 flux was measured in the field before re-application of treatment
  • Type: Date/time
  • Date format: MM/DD/YYYY HH24:MI
  • Missing values: None specified
PRE_CO2
  • Label:
  • Definition: Soil CO2 flux measured using LI-8100 before re-application of treatment
  • Type: Physical quantity
  • Unit: micromol CO2/m2sec
  • Maximum: Not specified
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • Null = None given
PRE_TEMP
  • Label:
  • Definition: Soil temperature at time of CO2 flux measurement before re-application of treatment
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • Null = None given
PRE_MOISTURE
  • Label:
  • Definition: Soil moisture at time of CO2 flux measurement before re-application of treatment
  • Type: Physical quantity
  • Unit: g/g soil
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • Null = None given
POST_DATE_TIME
  • Label:
  • Definition: The date and time CO2 flux was measured in the field after re-application of treatment
  • Type: Date/time
  • Date format: MM/DD/YYYY HH24:MI
  • Missing values: None specified
POST_CO2
  • Label:
  • Definition: Soil CO2 flux measured using LI-8100 before re-application of treatment
  • Type: Physical quantity
  • Unit: micromol CO2/m2sec
  • Maximum: Not specified
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • Null = None given
POST_TEMP
  • Label:
  • Definition: Soil temperature at time of CO2 flux measurement after re-application of treatment
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • Null = None given
POST_MOISTURE
  • Label:
  • Definition: Soil moisture at time of CO2 flux measurement after re-application of treatment
  • Type: Physical quantity
  • Unit: g/g soil
  • Maximum: 100
  • Minimum: 0
  • Precision: Not specified
  • Missing values:
    • Null = None given
COMMENTS
  • Label:
  • Definition: Generic comments about the sample
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label:
  • Definition: The date and time of the second measurement, same as POST_DATE_TIME
  • Type: Date/time
  • Date format: MM/DD/YYYY HH24:MI
  • Missing values: None specified

DOI: 

10.6073/pasta/f2c3854f11c24c54be3f3828c130746f

Short name: 

SE_CO2

Data set ID: 

4014
People

Owner/Creator: 

Contact: 

Additional Project roles: 

Field Crew
Data Manager
Data Manager