Name:
Thuja occidentalis - Fraxinus pennsylvanica / Acer pensylvanicum Woodland
Reference:
NatureServe Biotics 2019
Description:
This association is a northern white-cedar open-canopy woodland known only from scattered locations in northern New England. It occurs on gentle to moderately steep slopes over talus, glacial till, or bedrock, in settings that are not xeric and that may have areas where seepage emerges. Where the underlying bedrock is granitic, the near-coastal location may ameliorate the effects of the acidic substrate to some degree; substrates in other locations appear to have a circumneutral tendency. Canopy closure is variable from closed to quite open. The lower layers are typically sparse, although the herb layer may be locally extensive. The canopy is strongly dominated by <i>Thuja occidentalis</i>. Associated canopy trees include <i>Betula papyrifera, Betula alleghaniensis, Fraxinus pennsylvanica, Picea rubens, Pinus strobus, Tsuga canadensis, Abies balsamea</i>, or <i>Acer saccharum</i>. The shrub layer may include <i>Abies balsamea, Acer pensylvanicum, Diervilla lonicera</i>, or <i>Amelanchier</i> spp. The herbaceous layer includes <i>Eurybia macrophylla, Oclemena acuminata, Dryopteris marginalis, Maianthemum canadense, Trientalis borealis, Danthonia spicata, Carex pedunculata, Carex gracillima</i>, and <i>Carex laxiflora</i>. Typical bryophytes include <i>Dicranum</i> spp., <i>Leucobryum glaucum, Pleurozium schreberi</i>, and <i>Hylocomium splendens</i>. This cedar woodland overstory of the association resembles that of ~<i>Thuja occidentalis / Gaylussacia baccata - Vaccinium angustifolium</i> Woodland (CEGL006411)$$, but the mesic conditions, presence of <i>Fraxinus</i> spp. or <i>Betula alleghaniensis</i>, and lack of a heath layer distinguish this community.
Accession Code:
urn:lsid:vegbank.org:commConcept:35139-{79B85E73-7221-42FC-B1BD-D0F08D319431}
Plot-observations of this Community Concept:
2
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