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French forest Growing-stock volume and distribution

Growing-stock volume and distribution


The growing-stock volume of the French forests is estimated at 2.8 billion cubic meters. [1]
This volume calculated by the NFI is the stem volume of live trees having a diameter at breast height superior to 7.5 cm, from the stump to a minimum 7 cm top diameter over bark.

The growing-stock volume per hectare is 173 m³.
Almost 2/3 (72%) of the growing-stock volume are in privately-owned forests.
The volume per hectare is higher in state forests (197 m³/ha).
The French forest is mainly a broadleaved forest (64% of the growing-stock volume and more than 2/3 of the total forest area).
Broadleaved trees are mostly located in flat and low-elevation areas, except the Landes of Gascogne region in South-Western France, which is dominated by maritime pine, whereas the coniferous are in mountainous and Mediterranean areas (for more information, read the article "More than 190 tree species inventoried in France").
The oak wood volume accounts for 1/4 of the total growing-stock volume, beech for 10%, Norway spruce for 8% and silver fir for 8%.

Basic volume estimates in productive forests

GROWING STOCK

Volume of trees with dbh >= 7.5 cm, including stump, bole up to 7 cm diameter and bark

Total (Mio m3) Total per hectare (m3/ha)
Total 2,754 ± 47 173 ± 3
Broaleaves 1,767 ± 35 111 ± 2
Conifers 988 ± 36 62 ± 2

ANNUAL INCREMENT OF GROWING STOCK

Mean annual volume increment computed over the last 5 years; includes the biological increment and the volume of trees that reached 7.5 dbh in the last 5 years

Total (Mio m3 per year) Total per hectare (m3/ha per year)
Total 89.7 ± 1.3 5.6 ± 0.1
Broadleaves 52.8 ± 0.9 3.3 ± 0.1
Conifers 36.9 ± 1.2 2.3 ± 0.1

ANNUAL DRAIN

Mean annual volume mortality and mean annual volume fellings computed over the last 5 years

Total (Mio m3 per year) Total per hectare (m3/ha per year)
Total 8.8 ± 0.4 0.6 ± 0.02
Broadleaves 6.1 ± 0.3 0.4 ± 0.02
Conifers 2.6 ± 0.3 0.2 ± 0.02

DEAD WOOD

Volume of standing trees with dbh>= 7.5 cm.
Volume of lying trees or branches with dbh >= 2.5 cm.

Total (Mio m³)
Standing 113 ± 4.1
Lying 258 ± 7.1

Footnotes

[1The results are extracted from the inventory campains (led between 2015 and 2019), with 2017 as the mean year.