Above ground plant and below ground stem biomass in the Arctic LTER dry heath tundra experimental plots, 2006, Toolik Lake, Alaska

Abstract: 

Above ground plant and below ground stem biomass, percent nitrogen, and percent carbon were measured in the Arctic LTER dry heath tundra experimental plots. Treatments included control, and nitrogen and phosphorus amended plots for 10 years, and exclosure plots with and without added nitrogen and phosphorus.

Project Keywords: 

Data set ID: 

10025

EML revision ID: 

10

Short name: 

2006lgdhbmcn
People

Keywords: 

Arctic LTER keywords: 

Taxa: 

Dates

Date Range: 

Monday, July 24, 2006 to Wednesday, August 2, 2006

Publication Date: 

Saturday, December 12, 2009

Methods: 

The LTER dry heath (DH) exclosure treatments were set up in 1996 on extra 5 x 20 meter plots within the three-block design of the 1989 LTER dry heath experimental site. On each plot, a 5 x 10 meter section was fenced with large mesh (4-inch square mesh) to exclude large mammals. Within this fence a 5 x 5 meter plot was fenced with a small mesh (1/2-inch square mesh) to exclude both large and small mammals. In each block two fenced plots were set up: a plot with no fertilizer and a plot with annual fertilization (NP) treatments added as 10g/m2 nitrogen (as NH4NO3) and 5 g/m2 phosphorus (as triple superphosphate). In this biomass harvest, only no fence, no fertilizer (NFCT); small mesh fence, no fertilizer (SFCT); no fence, N plus P (NFNP); and small mesh fence, N plus P (SFNP) treatments were sampled in 2006.

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.

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

Sampling description:
Biomass quadrats, size 20 x 20 cm, were taken from treatment. Four quadrats were randomly located along transect lines in each of the replicate blocks of 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. The samples were dried at 50-70 degrees C in a drying oven and after several days weighed to the nearest milligram. Samples were lumped by block and subsequently ground in a Wiley Mill and analyzed for percent C and N using a Perkin-Elmer CHN analyzer (Series 2400).

Notes:
If no samples were present in the biomass data, zeros are used. If no samples were analyzed for %C and %N, decimal points were used as place holders.

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 2006lgdhbmcn.csv

Above ground plant... File Details

Office spreadsheet icon 2006lgdhbmcn.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
  • 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 sampled or a lumped group
  • Type: Nominal
  • Missing values: None specified
Tissue
  • Label: Tissue
  • Definition: The tissue type
  • Type: Nominal
  • Missing values: None specified
Biomass Type
  • Label: Biomass Type
  • Definition: Growth category of the biomass sample
  • 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
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
B2Q4
  • Label: B2Q4
  • 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
Average g/quad
  • Label: Average g/quad
  • 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.
  • Label: Std. Err.
  • 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
  • Label: Count
  • 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
B1%C
  • Label: B1%C
  • Definition: The percent carbon in tissues from species or lumped group in all 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
B1%N
  • Label: B1%N
  • Definition: The percent nitrogen in tissues from species or lumped group in all 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
B2%C
  • Label: B2%C
  • Definition: The percent carbon in tissues from species or lumped group in all quadrats in block 2
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B2%N
  • Label: B2%N
  • Definition: The percent nitrogen in tissues from species or lumped group in all quadrats in block 2
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B3%C
  • Label: B3%C
  • Definition: The percent carbon in tissues from species or lumped group in all quadrats in block 3
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
B3%N
  • Label: B3%N
  • Definition: The percent carbon in tissues from species or lumped group in all quadrats in block 3
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Comments
  • Label: Comments
  • Definition: Comments on what species are included in the "Other" categories
  • Type: Nominal
  • Missing values: None specified