Tous les sites de l'IGN | Le portail de l'IGN | RSS
French forest Species richness

Species richness

Map 1 - Tree species richness

Tree species richness

Due to its climatic, geologic and topographic diversity, France has rich and diversified forests.

Map 1 represents the number of tree species per sample plot, for the campaigns 2015 to 2019. It shows the local richness in tree species. The average number of forest tree species observed on one plot is 5. The Landes of Gascogne and the Mediterranean regions show the lowest tree species richness (between 1 and 5). The Landes of Gascogne forest is mainly covered by monospecific Maritime pine (Pinus pinaster) plantations; the Mediterranean region by evergreen oak (Quercus ilex) or pubescent oak (Quercus pubescens) coppices or Scots pine or Aleppo pine (Pinus halepensis) high forests.

Map 2 - Shrub species richness

Shrub species richness

Map 2 shows the number of shrub species per sample plot, for the campaigns 2015 to 2019. It indicates the local richness in shrub species. The number of shrub species is usually higher than tree species. This number varies from 0 to 25 and the average is 6.1. Unlike for tree species richness, the Mediterranean region has a high shrub species diversity. This is partly due to the important part of open canopy forest in this area.