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Natural Resources
Conservation Service
Ecological site R043AY509ID
Warm-Mesic Aquic-Xeric Loamy Flood Plains (riparian forest/shrub)
Last updated: 10/15/2020
Accessed: 08/17/2024
General information
Provisional. A provisional ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model and enough information to identify the ecological site.
MLRA notes
Major Land Resource Area (MLRA): 043A–Northern Rocky Mountains
Description of MLRAs can be found in: United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296.
Available electronically at: http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ref/?cid=nrcs142p2_053624#handbook
LRU notes
Major land resource area (MLRA): 043A-Northern Rocky Mountains
Modal LRU – 43A08 Clearwater Canyons
This LRU is composed predominantly of low to mid elevation foothills, structural benches, valleys, flats, mountain slopes and ridges. The soils tend to be loamy argixerolls. Volcanics are the dominant parent materials, along with occasional granite and other intrusives. Soil climate is a mesic temperature regime and xeric moisture regime with average annual precipitation around 675 mm (27 inches).
Classification relationships
This ES fits into the National Vegetation Standard’s Rocky Mountain-Great Basin Riparian Shrubland Group (Compare to previous Idaho range sites: R009XY031ID, STONY RIPARIAN POBAT-ALNUS/ELYMU; R009XY032ID, RIPARIAN DECA5-CAREX; R009XY033ID, STONY BOTTOMLAND SYAL/PSSP6)
Ecological site concept
This ES is found on somewhat poorly drained to well drained, loamy sites on floodplains. A water table can be present but is usually not within 75 cm of the surface during the May-Oct period. They have mesic temperatures and a plant community that varies from riparian woody species to sedges and grasses. They are Riparian woodlands and shrublands found on canyon floors of the Ponderosa Pine Zone. These riparian areas are associated with all streams at and below lower treeline, including permanent, intermittent and ephemeral streams with woody riparian vegetation.
Table 1. Dominant plant species
Tree |
(1) Populus balsamifera ssp. trichocarpa |
---|---|
Shrub |
(1) Salix |
Herbaceous |
(1) Galium trifidum |
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