Above ground plant and below ground stem biomass in the Arctic LTER acidic tussock tundra experimental plots, 2002, Toolik Lake, Alaska.

Abstract: 

Above ground plant and below ground stem biomass was measured in the Arctic LTER acidic tussock tundra experimental plots. Treatments included control, nitrogen plus phosphorus amended plots for either 6 or 13 years and vole exclosure plots with or without amends of nitrogen and phosphorus.

Project Keywords: 

Data set ID: 

1398

EML revision ID: 

17

Short name: 

2002gsttbm

DOI: 

10.6073/pasta/b227fa1d98ed466ea5fc3816ef5c8ba2
People

Keywords: 

Arctic LTER keywords: 

Taxa: 

Dates

Date Range: 

Tuesday, July 23, 2002 to Thursday, August 1, 2002

Publication Date: 

Monday, December 12, 2005

Methods: 

The LTER acidic tussock site was set up in 1989. The experimental design is four blocks of 5 x 20 meters plots with randomly assigned treatments within each block. Treatments include control (CT), amended with 10 g per square meter of Nitrogen and 5 g per square meter of phosphorus (NP), simple warming with plastic covered greenhouses (GH), simple warming amended with 10 and 5 g per square meter of nitrogen and phosphorus (GHNP) and 50% shade house with and without 10 and 5 g per square meter of nitrogen and phosphorus added (SH and SHNP).
Exclosure plots were setup in July 1996 on extra 5 x 20 meters plots within the four-block design of the 1989 LTER acidic tussock experimental plots. On each plot a 5x10 meter section was fenced with large mesh (4-inch square mesh) and within this fence a 5x5-meter plot was fenced with a small mesh (1/2-inch square mesh). In each block two fenced plots were setup: a plot with no fertilizer and a plot with annual fertilization (NP) treatments of 10 g/m2 Nitrogen (as NH4NO3) and 5 g/m2 Phosphorous (as triple superphosphate).
In this biomass harvest only the control, 1989 NP (NP13), GH, GHNP, control small mesh (EX), NP unfenced (NP6), and NP small mesh (EXNP) treatments were sampled.

Calculations: Units; Tissue mass data are expressed in g/quadrat (400 cm2). Multiply by 25 to get g/m2.

Reference Citations: Shaver, G. R. and F. S. Chapin, III. 1991. Production/biomass relationships and element cycling in contrasting arctic vegetation types. Ecological Monographs 61:1-31.
Sampling Description.
Biomass quadrats, size 20x20 cm, were taken from Toolik tussock site. Five quadrats were taken from each of four blocks. All aboveground biomass was clipped in 20x20 cm quadrats. Five quadrats were randomly located along line transects in each of four replicate blocks in each treatment. Aboveground biomass is considered "within" the quadrat if it is associated with a meristem that is within the quadrat. Quadrats were sorted within 24 hours into species and then into tissue type. Depending on the harvest, tissue types can be broad categories, i.e. above and below, or more detailed, i.e. inflorescences, new growth, old growth, etc. Leaf area was measured with a LiCor LI-3000A area meter.
The samples were dried at 60 degrees C in a drying oven and after several days weighed to nearest milligram. Samples are then returned to Woods Hole for nutrient analysis. Details are given in Shaver and Chapin (Ecological Monographs, 61(1), 1991, pg. 1-31).

Sites sampled.

Download a comma delimited (csv) or Excel file (includes metadata and data sheets).

Use of the data requires acceptance of the data use policy --> Arctic LTER Data Use Policy

To cite this data set see the citation example on the LTER Network Data Portal page for this data set.

File 2002gsttbm.csv

Above ground plant... File Details

Office spreadsheet icon 2002gsttbm.xls

Excel file with... File Details

Variables Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)
Date
  • Label: Date
  • Definition: Date of sampling in ddmmyyyy
  • Type: Date/time
  • Date format: dd-mmm-yyyy
  • Missing values: None specified
Site
  • Label: Site
  • Definition: Tundra site of sampling
  • Type: Nominal
  • Missing values: None specified
Treatment
  • Label: Treatment
  • Definition: Plot treatment
  • Type: Nominal
  • Missing values: None specified
Growth Form
  • Label: Growth Form
  • Definition: Growth form of species
  • Type: Nominal
  • Missing values: None specified
Species
  • Label: Species
  • Definition: The species
  • Type: Nominal
  • Missing values: None specified
Tissue
  • Label: Tissue
  • Definition: The tissue type
  • Type: Nominal
  • Missing values: None specified
Biomass Categroy
  • Label: Biomass Categroy
  • Definition: growth category.
  • Type: Nominal
  • Missing values: None specified
B1Q1
  • Label: B1Q1
  • Definition: oven dried weight of sample collected in a quadrat. (Code of variable name: B for block and the number following the B is the block number. The Q stands for quadrat with the number following the Q being the quadrat number)
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B1Q2
  • Label: B1Q2
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B1Q3
  • Label: B1Q3
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B1Q4
  • Label: B1Q4
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B1Q5
  • Label: B1Q5
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B2Q1
  • Label: B2Q1
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B2Q2
  • Label: B2Q2
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B2Q3
  • Label: B2Q3
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B2Q5
  • Label: B2Q5
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B3Q1
  • Label: B3Q1
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B3Q2
  • Label: B3Q2
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B3Q3
  • Label: B3Q3
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B3Q4
  • Label: B3Q4
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B4Q1
  • Label: B4Q1
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B4Q2
  • Label: B4Q2
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B4Q3
  • Label: B4Q3
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B4Q4
  • Label: B4Q4
  • Definition: oven dried weight of sample collected in a quadrat
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Average g per quadrat
  • Label: Average g per quadrat
  • Definition: Average of all quadrats for that species and tissue type.
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Std Err g per quadrat
  • Label: Std Err g per quadrat
  • Definition: Standard Error of the mean for species and tissue type.
  • Type: Physical quantity
  • Unit: gramPerFourHundredthMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Count g per quadrat
  • Label: Count g per quadrat
  • Definition: Number of quadrats
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Average g/m2
  • Label: Average g/m2
  • Definition: Average of all quadrats expressed as
  • Type: Physical quantity
  • Unit: gramPerMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Std Err g/m2
  • Label: Std Err g/m2
  • Definition: Standard error of the mean in
  • Type: Physical quantity
  • Unit: gramPerMeterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
%C B1
  • Label: %C B1
  • Definition: % Carbon pooling all samples quadrats in block 1.
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured