Numbers of Eriophorum vaginatum inflorescences, both unclipped and clipped by small mammals, were counted in experimental small mammal exclosure plots, Arct LTER mosit acidic tussock site, Toolik Field Station, Alaska, 1997 to present.

Abstract: 

Numbers of Eriophorum vaginatum inflorescences, both unclipped and clipped by small mammals, were counted in experimental plots. The plots are setup in moist acidic tussock tundra near Toolik Field Station, Alaska ((8 degrees 37' 27" N, 149 degrees 36' 27"W) and include fenced exclosures in both fertilized and unfertilized tundra.

Project Keywords: 

Data set ID: 

1411

EML revision ID: 

13

Short name: 

1997_current_gsherbivory
People

Keywords: 

Arctic LTER keywords: 

Taxa: 

Dates

Date Range: 

Thursday, July 17, 1997 to Tuesday, June 3, 2014

Publication Date: 

Tuesday, December 12, 2006

Methods: 

Two different exclosure designs are used: 1). In 1990 two set of exclosures were installed near the ARC LTER Moist Acidic Tussock Tundra experimental plots. Each set consisted of an outer 10x10 meter large mesh (4-inch square) fence, an inner 5x5 meter medium mesh (2-inch square) fence and a 2.5x2.5 meter small mesh (1/2-inch square) fence within the 5x5 meter fence. 2). In July 1996 additional exclosure plots were setup in 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). Each block has two fenced plots; 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). Total number of Eriophorum vaginatum inflorescences are counted in control unfenced, control small mesh, NP unfenced, and NP small mesh treatments. Any clipped inflorescences were also counted.
Notes: Clipped inflorescences were not counted every year. Missing counts are indicated by #N/A.

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Variables Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)
Date
  • Label: Date
  • Definition: Date of count in dd-mm-yyyy
  • Type: Date/time
  • Date format: dd-mmm-yyyy
  • Missing values: None specified
Site
  • Label: Site
  • Definition: Exclosure site.
  • Type: Nominal
  • Missing values: None specified
Block
  • Label: Block
  • Definition: Block number
  • Type: Nominal
  • Missing values: None specified
Treatment
  • Label: Treatment
  • Definition: Fertilized or a control plot
  • Type: Nominal
  • Missing values: None specified
Exclosure
  • Label: Exclosure
  • Definition: Type of fence: LF = large mesh, MF = medium mesh, SF = small mesh, NF = no fence.
  • Type: Nominal
  • Missing values: None specified
No_inflorescense
  • Label: No_inflorescense
  • Definition: Number of Eriophorum inflorescences
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
No_clipped
  • Label: No_clipped
  • Definition: Number of inflorescences clipped by animals
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Total No_Inflorescense
  • Label: Total No_Inflorescense
  • Definition: Total of all clipped and non-clipped inflorescences.
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
% clipped
  • Label: % clipped
  • Definition: Percent inflorescences clipped by animals.
  • 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
  • Type: Nominal
  • Missing values: None specified