Login | Datasets | Logout
 

View Community Concepts - Detail

Abies grandis / Mahonia nervosa Forest | NatureServe Biotics 2019
  click to update datacart
Name: Abies grandis / Mahonia nervosa Forest
Reference: NatureServe Biotics 2019
Description: This forest association occurs in the eastern Cascades of Washington between Lake Chelan and Mount Adams on all aspects between 760-1100 m (2500-3600 feet) elevation. Two locally described associations, <i>Abies grandis / Mahonia nervosa</i> and <i>Abies grandis / Mahonia nervosa / Calamagrostis rubescens</i>, are included in this type. The former appears on midslopes on deeper soils with more volcanic ash and with more maritime climates than the latter, which is typically found on upper slopes. <i>Pseudotsuga menziesii</i> codominates the forest canopy with <i>Abies grandis</i>. <i>Larix occidentalis, Pinus ponderosa</i> or <i>Pinus contorta</i> can be members of the upper canopy. <i>Abies grandis</i> dominates the regeneration layers. A short-shrub layer (less than 1 m) with scattered forbs and graminoids typify the understory. The evergreen shrub <i>Mahonia nervosa</i> is found in all examples and usually the most abundant of several shrubs. <i>Symphoricarpos mollis, Rosa gymnocarpa, Linnaea borealis</i>, and <i>Paxistima myrsinites</i> are the most commonly associated shrubs. The graminoids <i>Calamagrostis rubescens</i> and <i>Carex geyeri</i> are the most abundant and frequent herbaceous species, although a few of several possible broad-leaved forb species are always present. Sampled stands are between 75 and 125 years old; the oldest stands are around 200 years old. This association includes <i>Abies grandis</i> forest with <i>Mahonia nervosa</i> well-represented in the understory without a dominant tall-shrub component (<i>Acer circinatum</i> primarily), and/or with an herbaceous layer that is not dominated by <i>Achlys triphylla</i>. This association is found on better drained uplands sites than sites with abundant <i>Achlys triphylla</i>. <i>Spiraea lucida, Calamagrostis rubescens</i>, and <i>Festuca occidentalis</i> are more common in this association than on sites with abundant <i>Achlys triphylla</i>. 
Accession Code: urn:lsid:vegbank.org:commConcept:29180-{DA2FAA0A-43B1-4385-A354-8F5C7DC00019}
Plot-observations of this Community Concept: 0
      Party Perspective according to: NatureServe (organization)
Perspective from: 26-Nov-1997 to: ongoing
      Names:   UID: ELEMENT_GLOBAL.2.683996 NatureServe ExplorerNatureServe Explorer logo
  Code: CEGL000271
  Translated: Grand Fir / Cascade Barberry Forest
  Scientific: Abies grandis / Mahonia nervosa Forest
(convergence) and Synonyms:
(similar) CEGL000271
(similar) Abies grandis / Mahonia nervosa Forest
(similar) Abies grandis / Mahonia nervosa Forest