Table 2 Summary statistics of the regression models of changes in the growing stock against forest attributes across forest ownership and composition strata. Spatial dau units formed the observations of these models. The timespan indicates the year of the first available inventory (in parentheses), the year when 80% of dau were available, and the year of the last inventory (for which all dau were available). GS_i: initial growing stock, GSD_i: initial mean growing stock density, ∆S₋₁: forest area increase over the previous between-inventory period. Effects of the decreases in forest area concomitant to the studied BIP (ΔS) are not presented (as the variable was included as a controlled effect) but the effects were non-significant (for M1 and M2) or positive (for the other models). Semi-partial r²: r² variation between the corresponding model and that where the predictor is dropped out. RSE: residual standard error. Test of significance: p < 0.05: *, p < 0.01: **, p < 0.001: ***. OPF refers to ‘other public forests’, essentially belonging to municipalities, and subjected to a legal management plan. Relationships between total GS change (M1) and GS change in private broadleaved forests (M5) and their predictors are presented in Annex Fig. 7 and Annex Fig. 8.

From: Unprecedented pluri-decennial increase in the growing stock of French forests is persistent and dominated by private broadleaved forests