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Tree Ring Increments - width data

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Variables
Region
  • Label: region_id
  • Definition: The greater region from which the sample was collected. Regions consist of several forest stands.
  • Type: Code list
  • Codes:
    • 1 = Ann Arbor/ South
    • 2 = University of Michigan Biological Station/ North
  • Missing values: None specified
Stand
  • Label: stand_id
  • Definition: The forest stand from which the sample was collected.
  • Type: Code list
  • Codes:
    • 1 = E.S. George Reserve Wet
    • 2 = Radrick Forest
    • 3 = Stinchfield Woods
    • 4 = Aspen
    • 5 = Balsam Fir
    • 6 = Northern Hardwood
  • Missing values: None specified
Species
  • Label: species_id
  • Definition: The species of tree sampled.
  • Type: Code list
  • Codes:
    • 1 = Red maple/ Acer rubrum
    • 2 = Sugar maple/ Acer saccharum
  • Missing values: None specified
Tree
  • Label: Tree
  • Definition: The specific tree from which the sample was collected, with numbers being site specific. The numbers signify a unique tree at each site, though the count resets repeat between sites.
  • Type: Nominal
  • Missing values: None specified
Tag
  • Label:
  • Definition: The unique tag number physically attached to each tree in a stand. Tags were established in 2017 during a stand-wide census, with each tree in a stand being assigned a unique value, though the count repeats at each site.
  • Type: Nominal
  • Missing values: None specified
Year of Measurement
  • Label:
  • Definition: The year the diameter was measured at the height of core collection.
  • Type: Nominal
  • Missing values: None specified
dbh
  • Label:
  • Definition: Diameter at breast height (dbh) of each tree, measured approximately at the height of core collection. Each value was measured by hand using dbh tape.
  • Type: Physical quantity
  • Unit: millimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
x-coordinate
  • Label:
  • Definition: Each stand is 100 meters by 100 meters. Coordinates for each tree's relative position were estimated within the plot were estimated during the 2017 census. The locations were designated with an x- and y-coordinate, the former of which is listed in this column.
  • Type: Nominal
  • Missing values: None specified
y-coordinate
  • Label:
  • Definition: Each stand is 100 meters by 100 meters. Coordinates for each tree's relative position were estimated within the plot were estimated during the 2017 census. The locations were designated with an x- and y-coordinate, the latter of which is listed in this column.
  • Type: Nominal
  • Missing values: None specified
Date Range: 
Friday, January 1, 1999 to Friday, December 31, 2021

Additional Information

FieldValue
mimetypetext/csv
filesize239.26 KB
resource typefile upload
timestampAug 21, 2023