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en:data:bryce

Vegetation data from Bryce Canyon (Utah, USA)

Source of data

Roberts (1992), used by author as example dataset in library labdsv.

Description of the dataset

The dataset contains 160 circular 375 m2 plots, where all herb species and their cover was recorded (using so called Pfister scale, similar to Braun-Blanquet scale - see the table here. Altogether 169 vascular species were recorded. The woody species, although also recorded in the original study, are not included in the dataset (authors argument that woody species more than ecological factors reflect successional status of the vegetation).

Locality

Bryce Canyon National Park Bryce Canyon National Park has an area 14000 ha, and is located in Southern Utah (USA) on the floristic boundary between flora of Rocky Mountains and Colorado Plateau. Typical vegetation of the park consists of badlands in lowlands, Pinus-Juniperus forest and Pinuse ponderosa savanas at middle elevation and mixed coniferous forests in higher elevation.

The file with coordinates, which can be opened in Google Earth: bryce.kml1)

Environmental variables

Name of the variableDescription
labelsPlot numbers
annradAnnual sum of direct radiation
aspAspect [°]
avaspect = (1+cos(asp-30)/2)
depthSoil depth [deep and shallow]
eastUTM coordinates of latitude
elevElevation [ft]
groradRadiation during the vegetation season
northUTM coordinates of longitude
posTopographical position [bottom, low_slope, mid_slope, ridge, up_slope]
quadUSGS 7.5 minute quadrant
slopeSlope [%]

Script for direct import of data into R

# If you need to install labdsv package, use the following:
# install.packages ('labdsv')
 
library (labdsv)
data (bryceveg)  # matrix with species data (160 samples in rows and 169 species in columns)
data (brycesite) # matrix of environmental variables (160 samples in rows and 11 environmental variables in columns)
 

References

Roberts D.W. (1992): Plant Community Distribution and Dynamics in Bryce Canyon National Park: Final Report for Project PX 1200-7-0966 (www)

1)
you need Google Earth installed on your computer to open this file; zdroj: http://cc.oulu.fi/~jarioksa/opetus/metodi/
en/data/bryce.txt · Last modified: 2017/10/11 20:36 (external edit)