WRCCRF 12-ha Plot and Tree Data

The WRCCRF 12-ha permanent plot was fully established in 1999 measuring 400 m x 300 m and consisting of
25 m x 25 m square subplots the corners of which have iron bars and caps with corner number.
The canopy crane is located in the north-eastern section often referred to as the "crane plot."
Maximum reach of the crane is approximately 85 m which defines the "crane circle."
Topography is on the gentle (< 10% slope) southeastern foot of Trout Creek Hill a shield volcano (792 m elev.). 





 UTM Zone 10, contour = 3 m, north is up, source USGS SDTS Stabler 10 m DEM

Tree Data
Two data files are currently available for the 12-ha permanent plot: basic tree data (WRCCRF12hatreedata.csv) and tree heights (WRCCRF12hatreeht.csv).
Before accessing these data, please send an e-mail message to the WRCCRF which includes your full name and title, e-mail address, institution etc., and
a brief summary of proposed usage for these data. As a matter of professional courtesy please acknowledge the WRCCRF data archive when using data
in any publication or presentation in any format.

File name: WRCCRF12hatreedata.csv
Live tree data as of 1999
File last updated: 08-07-06
LOCATION: WRCCRF12ha the complete 12-ha plot
TAG: all trees > = 5 cm diameter at 1.3 m above forest floor are tagged with a unique ID number
YEAR: Gregorian year of data collection
SPECIES: four-letter species botanical acronym
ABAM (Pacific silver fir Abies amabilis)
ABGR (grand fir A. grandis)
ABPR (noble fir A. procera)
ALRU (red alder Alnus rubra)
CONU (Pacific dogwood Cornus nuttallii)
PIMO (western white pine Pinus monticola)
PSME (Douglas-fir Pseudotsuga menziesii)
RHPU (cascara Rhamnus purshiana)
TABR (Pacific yew Taxus brevifolia)
THPL (western red-cedar Thuja plicata)
TSHE (western hemlock Tsuga heterophylla)
DBH: diameter in centimeters at breast height (1.3 m above forest floor). If tree is forked above DBH then it's counted as one stem
if forked below DBH then each fork > = 5 cm DBH is counted as a separate stem
X: easting distance in meters from plot origin
Y: northing distance in meters from plot origin
Z: elevation at tree base (note: elevation at crane base is approximately 371 m)

File name: WRCCRF12hatreeht.csv
Measured and estimate live tree heights as of 1997
File last updated: 01-28-03
YEAR: Gregorian year of data collection
TAG: trees > = 5 cm diameter at 1.3 m above forest floor are tagged with a unique ID number
HEIGHT: cosign-corrected tree height in meters from forest floor to apparent stem apex measured via ground-based laser or height stick
Tree with tag number greater that 4000 were estimated using a logistic function incorporating DBH and HT of trees with tag numbers less than 4000