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Data
»
Microbial mat biomass, isotopes, and nutrient ratios sampled over a longitudinal gradient of two McMurdo Dry Valley streams
STREAM_ISOTOPES_RCVG
File:
STREAM_ISOTOPES_RCVG.csv
(11.88 KB)
...
or query the dataset by variables and dates of interest:
Variables
DATASET_CODE
Label:
Dataset code
Definition:
DATASET_CODE
Type:
Nominal
Missing values:
None specified
STREAM
Label:
Stream
Definition:
Stream name in the Lake Fryxell Basin, Taylor Valley, Antarctica.
Type:
Nominal
Missing values:
None specified
DATE_SAMPLED
Label:
Date sampled
Definition:
Date samples were collected.
Type:
Date/time
Date format:
MM/DD/YYYY
Missing values:
None specified
TIME_SAMPLED
Label:
Time sampled
Definition:
Time a sample was taken (for POM only). Expressed in NZST (daylight savings time is observed).
Type:
Date/time
Date format:
HHMM
Missing values:
BLANK = No data
TRANSECT
Label:
Transect
Definition:
The established MCM LTER transect that samples were taken from.
Type:
Nominal
Missing values:
None specified
SAMPLE_TYPE
Label:
Sample type
Definition:
Type of sample. Includes the three mat types (i.e., black, green, orange) as well as POM (particulate organic matter).
Type:
Nominal
Missing values:
None specified
DISTANCE
Label:
Distance
Definition:
Distance of a given transect from the Von Guerard Glacier as estimated using Google Earth.
Type:
Physical quantity
Unit:
kilometer
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
None specified
D13C
Label:
d13C
Definition:
Measure of the ratio of 13C:12C in standard delta notation, expressed relative to universal isotope standards (Pee Dee Belemnite) in parts per thousand (per mil).
Type:
Physical quantity
Unit:
perMil
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
BLANK = No data
D15N
Label:
d15N
Definition:
Measure of the ratio of 15N:14N in standard delta notation, expressed relative to universal isotope standards (atmospheric N2) in parts per thousand (per mil).
Type:
Physical quantity
Unit:
perMil
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
BLANK = No data
CN
Label:
C:N
Definition:
Molar ratio of carbon (C) to nitrogen (N). Blank cells indicate missing values.
Type:
Nominal
Missing values:
None specified
CP
Label:
C:P
Definition:
Molar ratio of carbon (C) to phosphorus (P). Blank cells indicate missing values.
Type:
Nominal
Missing values:
None specified
NP
Label:
N:P
Definition:
Molar ratio of nitrogen (N) to phosphorus (P). Blank cells indicate missing values.
Type:
Nominal
Missing values:
None specified
AFDM
Label:
Ash-free dry mass
Definition:
The mass of the mat sample lost following ignition per unit area.
Type:
Physical quantity
Unit:
milligramsPerCentimeterSquared
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
BLANK = No data
CHLA
Label:
Chlorophyll-a
Definition:
Quantity of measured chlorophyll-a pigment per unit area.
Type:
Physical quantity
Unit:
microgramsPerCentimeterSquared
Maximum:
Not specified
Minimum:
Not specified
Precision:
Not specified
Missing values:
BLANK = No data
AI
Label:
Autotrophic index
Definition:
The ratio of chlorophyll-a to ash-free dry mass. Blank cells indicate missing values.
Type:
Nominal
Missing values:
None specified
Data Source Details
Header lines:
1
Orientation:
Column
Field delimiter:
,