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11-18-25 PTRC
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11-18-25 PTRC
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8 <br />community was of moderate quality with low invasive species presence, shown by the Composite Invasive <br />Species Assessment (CISA) and the low Percent Native Vegetation (%PNV). Themain canopy layer of the <br />woodland is comprised of predominantly black walnut (Juglans nigra), northern red oak (Q. rubra), and <br />boxelder (Acer negundo), with a shrub layer dominated by woody invasives in patches, specifically common <br />buckthorn (Rahmnus cathartica), scattered individuals of honeysuckle (Lonicera spp.) and white mulberry <br />(Morus alba). Other native woody vegetation includedpoplar (Populus), maple (Acer), ash (Fraxinus)and <br />raspberry (Rubus)genera, the most common being Missouri gooseberry (Ribes missouriense) and box elder <br />(Acer negundo). <br />Native herbaceous vegetation was more diverse in 2025, with white snakeroot (Ageratina altissima) and <br />spotted touch-me-not (Impatiens spp.) dominatingthe trailside ground cover and stretching into the <br />woodland, though much of the interior was most characterized by Virginia creeper (Parthenocissus <br />quinquefolia),and Pennsylvania sedge (Carex pensylvanica), with scatterings of other species including <br />Solomon’s plume (Maianthemum racemosum), Solomon’s seals (Polygonatum spp.), spiderworts <br />(Tradescantia spp.), Jack-in-the-pulpit (Arisaema triphyllum),red baneberry (Actaea rubra), Virginia <br />waterleaf (Hydrophyllum virginianum), rue anemone (Thalictrum thalictroides), andearly meadow-rue <br />(Thalictrum dioicum). Non-native and invasive herbaceous species are also present in moderate densities, <br />including burdock (Arctium spp.), smooth brome (Bromus inermis), Dame’s rocket (Hersperis matronalis), <br />motherwort(Leonorus cardiaca), and garlic mustard (Alliaria petiolata).This diversity denotesa robust <br />seedbank that will likely continue to be expressedas invasive woody populations diminish, however there <br />will be the potential for weedy or invasive herbaceous species to dominate without maintenance. <br />Resource Threats and Habitat Goals <br />Buckthorn and honeysuckle shrubs have dominated the understoryand mid-canopy layers, largely <br />preventing diversification in the shrub and ground layers of native species. Areas of weedier natives, such as <br />the spotted touch-me-not and raspberries, have expanded into edge areas where more light can penetrate <br />to their growing zones.Both groups of organisms will need to be challenged for space to achievehabitat <br />goals, or else they will recolonize after initialgrantfundedwork is completed.Additionally, the park’s ash <br />(Fraxinus) and oak (Quercus) populations may decline due to emerald ash borer and oak wilt, providing <br />opportunities for both invasive species recolonization and native planting or seeding. <br />The Minnesota Land Cover Classification System (MLCCS) was developed by the Minnesota Department of <br />Natural Resources (MNDNR) to “categorize urban and built-up areas in terms of land cover rather than land <br />use” (cite). Hazelnut Park’s North Woodland (Fig. 3.2) is described as upland deciduous forest, with the <br />south woodland being unmapped in the 2004 survey. Similarly, the Minnesota Native Plant Community <br />(NPC) Classification proposed by the dominant species is FDs37, Southern Dry-Mesic Oak (Maple) <br />Woodland (cite). As the invasive shrubs are removed and replaced during the initial years of restoration this <br />dynamic will need to be monitored and guided towards native diversity such as seen in MHs38, which is <br />predominantly composed of a mix of oaks (Quercus)and maples(Acer)in the canopy, dogwoods (Cornus) <br />and stone fruit trees including Prunus species in the shrub layer, and sedges andwoodland-adaptedforbs <br />inhabiting the ground layer (cite). <br />Restoration ObjectivesOverview <br />Further restoration efforts for Hazelnut Park shouldincludemanaging the emergingseedling invasive <br />buckthorn and weedy herbaceous species populations while introducing additional woodland species <br />biodiversity, both herbaceous and woody. Long term maintenance of the site will likely involve periodic
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