Only field stations and information system have been taken into account for the estimation of investment and operating costs given above. Two permanent employees ensure the maintenance of the infrastructures and the technical help to researchers. It is accessible at any time by road. One technician lives on the site providing direct watch, and supervision of maintenance. A 5 workers-team offers technical assistance to researchers, maintenance of infrastructures and data collections.
Several treatments simulate different types and intensities of silviculture.
One 25 ha plot of untouched forest. Topography and soils are mapped. Data are integrated in a Geographical Information System. Computer network and interface software ensure the accessibility of those data. Arlequin also offers access to the databanks of the herbarium, of the wood sample collection and of the documentation.