Stream Algae Photosynthesis/Light Measurements

Summary

Abstract: 

As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic sampling program has been undertaken to monitor the abundance and species distribution of algal mats in glacial meltwater streams of the region. This data set includes results from light and dark incubations of algae to calculate net and gross primary productivity versus light curves of algal communities from Green Creek in Fryxell basin during January 1995. This data set constitutes the LTER algal primary productivity data for streams.

Date Range: 

January 1, 1995 to January 31, 1995
Data Citation
Mcknight, D. 2015. McMurdo Dry Valleys LTER: Stream Algae Photosynthesis/Light Measurements. Environmental Data Initiative. DOI: 10.6073/pasta/ffa099b021b7285bab061c75973b478e. Dataset accessed 21 October 2019.
Dataset(s)

Variables (click to expand): 

Dataset code
  • Label:
  • Definition: Code representing stream algae photosynthesis/light measurements dataset
  • Type: Nominal
  • Missing values: None specified
Strmtrnsid
  • Label:
  • Definition: Code representing stream transect
  • Type: Nominal
  • Missing values: None specified
LOCATION
  • Label: Stream name
  • Definition: Stream location / name of transect in which measurements were made
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date
  • Definition: Date of sample
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values: None specified
Algae Type
  • Label:
  • Definition: Type of algae species is associated with (red, black, green or orange)
  • Type: Nominal
  • Missing values: None specified
Replication #
  • Label:
  • Definition: Replication number of sample
  • Type: Nominal
  • Missing values: None specified
INCUBATION TEMP (C)
  • Label: Incubation temp (celcius)
  • Definition: Temperature at which incubation occurred
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: 8.8
  • Minimum: 5
  • Precision: 0.1
  • Missing values: None specified
Incubation time (hr)
  • Label:
  • Definition: Number of hours spent incubating
  • Type: Physical quantity
  • Unit: hour
  • Maximum: 4
  • Minimum: 2.75
  • Precision: 0.01
  • Missing values:
    • Required entry = None given
PAR (%Full Strength)
  • Label: PAR (%Full Sunlight)
  • Definition: Percent of full sunlight under which incubation occurred
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: 100
  • Minimum: 0
  • Precision: 0.1
  • Missing values:
    • Required entry = None given
PAR (uE/m2/s)
  • Label: PAR (microE/m2/s)
  • Definition: Photosynthetically active radiation
  • Type: Physical quantity
  • Unit: microE/m2/s
  • Maximum: 1110
  • Minimum: 0
  • Precision: 1
  • Missing values: None specified
NPP CH OVER TIME(ug C/cm2/hr)
  • Label: NPP Change over Time
  • Definition: Change in net primary production over time
  • Type: Physical quantity
  • Unit: microgC/cm2/hr
  • Maximum: 15
  • Minimum: -15
  • Precision: 0.01
  • Missing values:
    • Required entry = None given
AFDM (mg/cm2)
  • Label:
  • Definition: Ash-free dry mass
  • Type: Physical quantity
  • Unit: mg/cm2
  • Maximum: 40
  • Minimum: 0
  • Precision: 0.01
  • Missing values:
    • Required entry = None given
NPP CH/AFDM (ug C/g AFDM/hr)
  • Label: NPP Change per AFDM
  • Definition: Change in net primary production per gram of ash-free dry mass over time
  • Type: Physical quantity
  • Unit: microgC/gAFDM/hr
  • Maximum: 1
  • Minimum: -1
  • Precision: Not specified
  • Missing values:
    • Required entry = None given
File name
  • Label:
  • Definition: Original file name in which this information was submitted
  • Type: Nominal
  • Missing values: None specified

File: 

strmppvs.csv (11.65 KB)

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

Short name: 

strmppvs

Dataset ID: 

15
People

Principal Investigator(s): 

Contact: