Preparatory materials, software and data 

All the software, occurrences data and environmental layers used in this tutorial are freely available on the web. To successfully complete the tutorial it is necessary to install on you computer the R statistic environment (http://www.r-project.org), the package dismo (http://cran.r-project.org/web/packages/dismo/index.html) and the package biomod2 (http://cran.r-project.org/web/packages/biomod2/index.html). The examples provided will be based on occurrences of the rose-ringed parakeet Psittacula krameri obtained from GBIF database. Environmental layers will be obtained from the Worldclim database (http://www.worldclim.org) . Some ready to use R scripts, created ad-hoc for the preparation of occurrences and environmental layers will be provided. Furthermore, all the procedure described in the tutorial, will be provided as R script. Additional R libraries could be necessary and is good that they will be installed on your machine before to start with this tutorial: “raster”, “rgeos”, “rgdal”, “fmsb”, “sp”. The scripts have been tested on different platform and different version of R. If you are using the very last version of R (to date the 3.1.2) and you encounter some problem in downloading libraries such as “rgeos” we suggest to downgrade to R 3.0.3. We will provide a zip archive with the R script (named “Tutorial.R”) necessary for all the modules of the tutorial, a folder (named “script”) containing additional R scripts, a folder (named “Shapefile_Pkrameri”) with the shapefile of the native range of P. krameri and the maxent jar file (version 3.3.3k downloaded from http://www.cs.princeton.edu/%7Eschapire/maxent/). All these files and folders must be placed in the same folder. Furthermore, it is necessary to download climatic layers for future condition from http://biogeo.ucdavis.edu/data/climate/cmip5/2_5m/cc85bi70.zip. The file included in this zip file must be extracted in a folder that must be named “future”. The newly created folder (and the climatic layers inside) must be placed in the same folder with the other files.