Northern Ontario Plant Database
Northern Ontario Vegetation Type (V-type)
Summary: A hardwood stand type dominated by trembling aspen, which provides up to 40% cover in the canopy, but occurring as regeneration in fewer sample plots with only 2-5% cover in the understorey. In 1/3 to 2/3 of sample plots, balsam poplar provides 21-40% cover in the overstorey and 2-5% cover in the understorey. Black spruce, balsam fir, and white spruce provide little cover in the overstorey, but provide 2-10% cover in the understorey in 1/3 to 2/3 of the sample plots, with black spruce the common of these three conifer species. The relatively higher occurrence of conifer species in the understorey indicates that this vegetation type is a successional stage in a conifer forest type.
The tall shrub layer is dominated by speckled alder (21-40% cover), while wild red raspberry (6-10% cover) and prickly wild rose (2-5% cover) are the most common low shrubs. The low shrub layer is fairly rich, with serviceberry, red osier dogwood, and squashberry and 3 species of currants present in fewer than 2/3 of sample plots.
The rich herb layer, dominated by largeleaf aster (11-20% cover) and dwarf raspberry (6-10% cover), also includes sweet coltsfoot, naked miterwort, violets, and sedge species (2-5% cover each), as well as wild sarsaparilla (6-10% cover in fewer than 2/3 of the sample plots). Many other herbs, including the characteristic boreal forest species, occur with less frequency and with less than 5% cover.
The most common pteridophytes in this vegetation type include woodland horsetail, spinulose woodfern, and oak fern, which provide up to 5% cover in less than 2/3 of the sample plots. Similarly, the moss layer is sparse, due largely to the heavy layer of deciduous leaf litter, but patches of feathermosses, including Schreber's feathermoss, plume moss, and shaggy moss provide up to 5% cover.
Soil & Ecosite Types: The Trembling Aspen-Balsam Poplar-Speckled Alder Vegetation Type (NE-V10) occurs on moist, shallow organic soils (S15, S16) as well as fresh to moist fine loamy to clayey soils (S13, S14). This vegetation type may occur on ecosite types ES 6f (Black Spruce-Trembling Aspen-Fine Soil), ES 6m (Trembling Aspen-Black Spruce-Balsam Fir-Medium Soil), ES 7f (Trembling Aspen-White Spruce-White Birch-Fine Soil), ES 10 (Trembling Aspen-Black Spruce-Balsam Fir-Moist Soil), and ES 20 (White pine-Hardwood Mixedwood).
overstoreyShrubs:trembling aspen (Populus tremuloides) regeneration
tall shrubsDwarf Shrubs & Herbs:speckled alder (Alnus incana subsp. rugosa)low shrubs
dwarf shrubsFerns & Fern Allies:dwarf raspberry (Rubus pubescens)forbs
Note: Species listed above are taken from the Vegetation type description and the Species Percentage Cover by Vegetation Type Tables (pg. D 34). Species are listed in order of most cover and abundance.Schreber's feathermoss (Pleurozium schreberi)