SSDM : an R package to predict distribution of species richness and composition based on stacked species distribution models Schmitt, S. Pouteau, R. Justeau, D. /Boissieu, Florian de Birnbaum, P. bioinformatics community ecology conservation habitats modelling software 1. There is growing interest among conservationists in biodiversity mapping based on stacked species distribution models (SSDMs), a method that combines multiple individual species distribution models to produce a community-level model. However, no user-friendly interface specifically designed to provide the basic tools needed to fit such models was available until now. 2. The ssdm package is a computer platform implemented in r providing a range of methodological approaches and parameterisation at each step in building the SSDM: e.g. pseudo-absence selection, variable contribution and model accuracy assessment, inter-model consensus forecasting, species assembly design, and calculation of weighted endemism. 3. The object-oriented design of the package is such that: users can modify existing methods, extend the framework by implementing new methods, and share them to be reproduced by others. 4. The package includes a graphical user interface to extend the use of SSDMs to a wide range of conservation scientists and practitioners. 2017 text https://www.documentation.ird.fr/hor/fdi:010071870 fdi:010071870 Schmitt S., Pouteau R., Justeau D., Boissieu Florian de, Birnbaum P.. SSDM : an R package to predict distribution of species richness and composition based on stacked species distribution models. 2017, 8 (12), 1795-1803 EN MONDE NOUVELLE CALEDONIE