Table 1 Overview of soil characteristics, biomass, and species composition of forest types included in the study. Notation for soil pH, C:N ratio, shrub layer, and overstory biomass shows mean ± SE (min-max). Type with “-Ps” indicates Prunus serotina invasion
From: How do invasive trees impact shrub layer diversity and productivity in temperate forests?
Type | Number | Soil pH | Soil C:N | Shrub layer biomass (Mg ha−1) | Overstory biomass (Mg ha−1) | Main tree species (mean ± SE basal area proportion > 5%) |
|---|---|---|---|---|---|---|
Fagus | 9 | 4.06 ± 0.10 (3.64–4.64) | 40.85 ± 2.94 (29.89–58.55) | 1.93 ± 0.26 (0.70–3.20) | 376.34 ± 37.90 (196.27–549.68) | Fagus sylvatica (73.3 ± 7.6%), Quercus petraea (12.6 ± 2.6%), Pinus sylvestris (11.4 ± 6.6%) |
Pinus rich | 46 | 4.31 ± 0.10 (3.71–6.65) | 38.71 ± 0.91 (26.42–57.15) | 5.08 ± 0.61 (0.28–21.57) | 219.31 ± 6.62 (119.39–303.86) | P. sylvestris (57.2 ± 3.5%), Q. petraea (11.2 ± 2.7%), Acer pseudoplatanus (5.3 ± 1.1%), Acer platanoides (5.0 ± 1.2%) |
Pinus rich-Ps | 19 | 4.13 ± 0.06 (3.78–4.86) | 37.31 ± 1.04 (29.43–48.93) | 8.80 ± 1.34 (2.12–20.97) | 196.58 ± 7.24 (133.49–261.03) | P. sylvestris (77.4 ± 5.1%), P. serotina (5.1 ± 1.7%) |
Pinus poor | 7 | 3.93 ± 0.04 (3.76–4.16) | 40.93 ± 1.27 (34.75–47.57) | 2.53 ± 0.46 (1.05–4.23) | 180 ± 23.36 (91.48–246.32) | P. sylvestris (80.6 ± 5.6%), Betula pendula (4.1 ± 2.3%), F. sylvatica (5.1 ± 2.9%) |
Pinus poor-Ps | 23 | 4.20 ± 0.07 (3.78–5.06) | 43.08 ± 1.25 (31.91–54.44) | 7.08 ± 1.18 (1.55–23.28) | 186.79 ± 10.75 (60.5–261.74) | P. sylvestris (80.9 ± 5.8%), Q. petraea (10.4 ± 4.6%), P. serotina (6.4 ± 1.9%) |
Q. petraea | 22 | 3.91 ± 0.04 (3.56–4.32) | 42.77 ± 1.16 (30.26–51.32) | 4.07 ± 1.40 (0.32–25.35) | 234.72 ± 16.40 (91.05–394.96) | Q. petraea (44.7 ± 5.3%), P. sylvestris (42.9 ± 5.4%), F. sylvatica (6.3 ± 2.6%) |
Q. rubra | 12 | 4.21 ± 0.12 (3.67–5.16) | 48.52 ± 2.26 (32.75–61.92) | 1.38 ± 0.53 (0.06–5.06) | 263.21 ± 21.52 (193.74–381.94) | Q. rubra (77.2 ± 7.7%), P. sylvestris (10.6 ± 4.8%), Q. petraea (8.7 ± 4.8%) |
Quercus-Acer-Tilia | 20 | 5.64 ± 0.20 (3.95–7.10) | 36.77 ± 1.13 (26.10–47.06) | 6.05 ± 1.06 (0.47–16.25) | 226.26 ± 20.62 (84.61–434.71) | Q. robur (25.3 ± 6.0%), A. platanoides (16.6 ± 4.5%), Q. petraea (12.0 ± 3.8%), Tilia cordata (9.9 ± 4.4%), A. pseuodoplatanus (8.7 ± 2.4%) |
Robinia | 10 | 5.66 ± 0.36 (3.79–6.89) | 29.19 ± 1.24 (25.38–35.49) | 9.07 ± 2.55 (0.96–25.73) | 301.48 ± 32.67 (95.42–431.08) | Robinia pseudoacacia (66.9 ± 4.4%), Acer platanoides (8.8 ± 4.0%), Ulmus minor (8.4 ± 3.1%) |