Jeffrey Evans
Quantitative Methods in Spatial Ecology
An R package for sage grouse management
Utilities developed in support of the USDA-NRCS Sage Grouse Initiative (SGI)
Current functions include (click on function for tutorial):
breeding.density - Calculates breeding density areas base on population counts/density and spatial point density
tri - Implementation of the Riley et al (1999) Terrain Ruggedness Index
You can install the windows binary package at the R commandline using:
> install.packages("http://s3.amazonaws.com/sagegrouse/SGITools_0.1-0.zip ", type="binary", repos=NULL)
You can install the linux or mac packageat the R commandline using:
> install.packages("http://s3.amazonaws.com/sagegrouse/SGITools_0.1-0.tar.gz ", repos=NULL)
The package can be downloaded here:
windows binary : http://s3.amazonaws.com/sagegrouse/SGITools_0.1-0.zip
source: http://s3.amazonaws.com/sagegrouse/SGITools_0.1-0.tar.gz
References
Doherty, K.E., J.D. Tack, J.S. Evans, D.E. Naugle (2010) Mapping breeding densities of greater sage-grouse: A tool for range-wide conservation planning. Bureau of Land Management. Report Number L10PG00911
Riley, S.J., S.D. DeGloria and R. Elliot (1999) A terrain ruggedness index that quantifies topographic heterogeneity, Intermountain Journal of Sciences 5(1-4):23-27.
Stevens, B. S., D.E. Naugle, B. Dennis, J.W. Connelly, T. Griffiths, and K. P. Reese (2013) Mapping sage-grouse fence-collision risk: Spatially explicit models for targeting conservation implementation. Wildlife Society Bulletin, 37(2):409–415