Abstract for CNVC00094


Populus tremuloides / Rosa acicularis – Viburnum edule

Trembling Aspen / Prickly Rose – Squashberry
Peuplier faux-tremble / Rosier aciculaire – Viorne comestible

CNVC00094 is a boreal hardwood forest Association that ranges from Yukon to Manitoba. The canopy is primarily trembling aspen (Populus tremuloides), sometimes with balsam poplar (P. balsamifera) as an associate. White spruce (Picea glauca) and paper birch (Betula papyrifera) are occasionally present. Canopy cover is usually moderately closed but can vary from open to closed. The moderately to well-developed shrub layer typically includes prickly rose (Rosa acicularis) and squashberry (Viburnum edule), but soapberry (Shepherdia canadensis), green alder (Alnus viridis) or saskatoon (Amelanchier alnifolia) can be dominant. The herb and dwarf shrub layer is well developed and usually includes fireweed (Chamerion angustifolium), bunchberry (Cornus canadensis), dwarf raspberry (Rubus pubescens), cream-coloured vetchling (Lathyrus ochroleucus), twinflower (Linnaea borealis), northern bedstraw (Galium boreale), pink pyrola (Pyrola asarifolia), bluejoint reedgrass (Calamagrostis canadensis), wild strawberry (Fragaria virginiana), wild lily-of-the-valley (Maianthemum canadense), arctic sweet coltsfoot (Petasites frigidus) and American vetch (Vicia americana). The forest floor cover is mainly broad-leaf litter, so the moss layer is virtually nonexistent. CNVC00094 is an early seral condition that typically establishes after fire. It occurs in a region with a subhumid continental climate, usually on mesic, nutrient-medium sites. Five subassociations are distinguished: typic, Shepherdia canadensis, Alnus viridis, Amelanchier alnifolia and Betula papyrifera.