Fig. 3From: Forest land use discontinuity and northern red oak Quercus rubra introduction change biomass allocation and life strategy of lingonberry Vaccinium vitis-idaeaMean (+SE) plot level biomass, its allocation, water content, fruiting, density and height of V. vitis-idaea in four variants of pine forest: ancient (AF) and recent (RF) forests without (no inv) and with (inv) Q. rubra (n = 200). Groups denoted by the same letters did not differ statistically significantly (p > 0.05) according to the Tukey posteriori tests. For models – see Supporting Information IIBack to article page