The Swiss Federal Institute for Forest Snow and Landscape Research WSL

C9 Hèches

'Groupement Forestier des montagnes particulières de': a case from the mountains of southwestern France

General information on the forests of the GF des montagnes particulières de Hèches.

Forest community Mostly mixed beech-fir montane forest (Fagion sylvaticae and Luzulo-Fagion). Locally Tilio-Acerion ravine forests and Cephalantero-Fagion dry beech forest
Total forest area 930 ha (+272 ha of subalpine meadows)
Main management type Selective cutting system
Total mean volume Very wide range according to a wide array of soil conditions; from a few m3/ha (rocky soils) to more than 600 m3/ha (thick fertile soils)
Annual growth Very variable. More than 10 m3/ha for the most productive stands
Deadwood Wide range depending on local conditions and management intensity: from 9 to 60 m3/ha (diameter >10 cm)
Altitude 620–1900 m a.s.l. (forest: 620–1500 m)
Ownership Private forest; ‘Groupement Forestier’ status
Geology 23 different substrates. Four main categories: (i) hard nutrient-rich Mesozoic limestones and dolomites; (ii) soft nutrient-rich Mesozoic clayey limestones and marls; (iii) acidic nutrient-poor Palaeozoic shales, Mesozoic puddingstones (conglomerate), ophite, etc.; and (iv) very acidic and strongly nutrient-poor Palaeozoic quartzite and shales
Protected area 0 ha
Nature protection area (Natura 2000) 0 ha
Protected area for the water spring of the
20 ha with specific constraints on management
Area without harvesting Roughly 200 ha (20 %)