Table 2 Distribution of included studies over different forest cover types
Forest cover type | Examples of dominant tree species | No. of studies |
|---|---|---|
Temperate broadleaf/mixed | Acer spp., Quercus spp. | 80 |
Boreal broadleaf/mixed | Betula spp., Populus tremula/tremuloides | 15 |
Poor-soil forest | Pinus spp., Betula pubescens ssp. czerepanovii | 19 |
Richer-soil conifers | Abies spp., Tsuga spp., Picea spp., Taxus baccata, Thuja plicata, Pseudotsuga menziesii | 19 |
Open woodland | Eucalyptus spp. (Australia) or Betula spp., Quercus spp. (European wooded pastures or meadows) | 11 |
Regenerating | Pinus sylvestris, Populus tremuloides | 12 |