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Chamaecyparis nootkatensis Temporarily Flooded Forest Alliance | Western Ecology Working Group of...
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Name: Chamaecyparis nootkatensis Temporarily Flooded Forest Alliance Reference: Western Ecology Working Group of... Description: Vegetation within this alliance occurs in cold, snowy environments in west-central Oregon. These are subalpine forests which occur at elevations over 1000 m, primarily west of the Cascade crest, where maritime influence and deep winter snowpacks are typical. Precipitation ranges from 150-400 cm annually, falling largely as snow, and snowpacks usually linger into June or later. These wetland forests are located on terraces along streams, in depressions, around edges of lakes, and on subirrigated slopes (which can be steep). Most stands are hydrated with seasonal ponding or flooding from snowmelt and runoff. Some sites are saturated with groundwater year-round. Soils are usually shallow, acidic, and nutrient-poor Histosols occurring over bedrock. Productivity of these sites is typically low, which discourages competition from faster growing conifers. Communities within this alliance occur at the ecotone between the subalpine and montane zones, and contain species from each zone. They are mature forests with closed to somewhat open canopies, often with multiple tree layers and copious woody debris. These are commonly mixed stands with Chamaecyparis nootkatensis dominating, but Abies amabilis or Tsuga mertensiana are important associates. Pseudotsuga menziesii and Pinus contorta may also be present. These forests have somewhat lush understories because of the abundant moisture. Shrubs such as Acer circinatum, Vaccinium membranaceum, Rhododendron albiflorum, or Oplopanax horridus dominate the understory of these stands. The herbaceous layer is typically lush, and is dominated by shade-tolerant, mesic species, including Athyrium filix-femina, Clintonia uniflora, Tiarella trifoliata, Polystichum munitum, and Carex spp.  Accession Code: VB.CC.18073.CHAMAECYPARISNO Plot-observations of this Community Concept: 0
	Party Perspective according to: NatureServe (organization) Perspective from: 26-Nov-1997 to: 01-May-2019
	status: accepted This Community's Level: Alliance This Community's Children: [none]		Names:   Scientific: Chamaecyparis nootkatensis Temporarily Flooded Forest Alliance   Translated: Alaska Yellow-cedar Temporarily Flooded Forest Alliance   UID: HIGHER_CLASS_UNIT.2.126396 NatureServe Explorer   Code: A.178