In the EuMon project, the focus is limited to the monitoring of two main components of biodiversity: species and habitats. For these main components, various properties may be monitored, e.g., trends in populations, distribution, community composition, habitat quality etc. The observations may be based on the collection of data on presence/absence, counts, mark-recapture data, population composition, phenology and other measures. In order to allow reliable inferences a sound statistical sampling design and appropriate analytical methods should be employed. Such aspects of biodiversity monitoring are covered by the EuMon project. The BioMAT tool provides support for the design and analysis of biodiversity monitoring.