Warm-Cryic, Moist-Udic, Loamy, Avalanche Chutes and Drainages (Sitka alder-Miner’s Lettuce)
Circle-spoke model
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Description
Historic disturbance creates glade openings. Alder establishes as early seral species. Alder dominance is maintained by repeated disturbance combined with other site factors. Scattered individual conifers may establish temporarily but rarely reach pole size. Most common is Picea engelmanii. Sitka alder provides thermal and hiding cover for many wildlife species and can have high population densities of pocket gophers and hares. These populations can impede conifer establishment. Most commonly observed understory species are Montia cordifolia, Pteridium aquilinum, Rudbeckia occidentalis, Achillea millefolium, Arnica latifolia and Carex spp.
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The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.