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Rorippa alpina Saturated Herbaceous Alliance | Western Ecology Working Group of...
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Name: Rorippa alpina Saturated Herbaceous Alliance Reference: Western Ecology Working Group of... Description: Vegetation in this alliance occurs in the alpine tundra in the mountains of Colorado. The climate regime is continental, with long, cold winters and short summers with frequent afternoon thunderstorms. Strong westerly winds are common in the winter and spring and distribute snow on the leeward side of the mountains. Large areas of late-lying snowpatches are located on the eastern slope. Stands are found between 3360 and 3510 m elevation on lakeshores and streambanks. Stands occur in areas where snow accumulates in the winter and melts late in the summer. Soils are young and poorly developed due to low soil temperature, low soil moisture during the summer, and a short growing season. Soils are classified as Entisols (Cryorthents). The soil profile has one or two thin horizons. The average surface pH is 5.4, slightly acidic, possibly due to leaching from late-lying snow. The majority of the ground surface is covered with bare soil and rock. Stands are small, and the number and cover of herbaceous species are low. Rorippa alpina is the dominant species in the herbaceous canopy, and Epilobium anagallidifolium is a common associate. The cryptogam layer may have a greater cover than the herbaceous; Bryum turbinatum, Philonotis fontana var. pumila (= Philonotis tomentella), and Pohlia drummondii are constant moss species.  Accession Code: VB.CC.19377.RORIPPAALPINASA 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: Rorippa alpina Saturated Herbaceous Alliance   Translated: Yellowcress Saturated Herbaceous Alliance   UID: HIGHER_CLASS_UNIT.2.124625 NatureServe Explorer   Code: A.1700