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shoshsite

Site Data for the Shoshone National Forest, Wyoming, USA


Description

The coniferous forests of the Shoshone National Forest range from lower elevation woodlands dominated by Pinus flexilis, through forests of Pseudotsuga menziesii, Pinus contorta, Picea engelmannii, Abies lasiocarpa and Pinus albicaulis with increasing elevation (Steele et al. 1983). One hundred and fifty sample plots were chosen at random from a larger set for this data set; the larger set was stratified by elevation, exposure, surficial geology, and geographic distribution.

Usage

data(shoshsite)

Format

A data.frame with sample plots as rows, and site variable as columns. Variables comprise:

elevation elevation above sea level in meters
aspect compass orientation of the site in degrees
slope slope steepness in percent
av aspect value: (cosd(aspect-30)+1)/2
swb site water balance: a tipping bucket model of water-year soil water
sprppt spring precipitation in cm
sumppt summer precipitation in cm
autppt autumn precipitation in cm
winppt winter precipitation in cm
sprtmp spring mean temperature degrees C
sumtmp summer mean temperature degrees C
auttmp autumn mean temperature degrees C
winppt winter mean temperature degrees C
sprpet spring potential evapotranspiration in cm
sumpet summer potential evapotranspiration in cm
autpet autumn potential evapotranspiration in cm
winpet winter potential evapotranspiration in cm
sprrad spring direct and diffuse solar radiation (correcting for topographic shading)
sumrad summer direct and diffuse solar radiation (correcting for topographic shading)
autrad autumn direct and diffuse solar radiation (correcting for topographic shading)
win winter direct and diffuse solar radiation (correcting for topographic shading)
ffd frost free days
dday degree days heat sum
tcol mean monthly temperature of the coldest month

Note

The data were derived from a multi-year effort by numerous scientists and field technicians. The project was directed by Kent Houston, Soil Scientist and Ecologist, Shoshone National Forest. The site data were calculated primarily by Dr. Niklaus Zimmermann, WSL, Birmensdorf, Switzerland http://www.wsl.ch/staff/niklaus.zimmermann/biophys.html

Source

Roberts, D.W. 2008. Statistical Analysis of Multidimensional Fuzzy Set Ordinations. Ecology 89:1246-1260


optpart

Optimal Partitioning of Similarity Relations

v3.0-3
GPL (>= 2)
Authors
David W. Roberts <droberts@montana.edu>
Initial release

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