301 Fremont cottonwood-California sycamore forest This California Central Valley riparian woodland or shrubland occurs on small to mid-sized rivers and is maintained by periodic flooding and sediment scouring which maintains the vegetation. Several invasive species, including Tamarix spp., Ailanthus altissima, and Arundo donax, can be problematic. 260 1 7 13 24 Roger Ottmar/Anne Andreu

USDA Forest Service Change Carex spp. to C. barbarae. Add Salix gooddingii to canopy midstory layer. Used California Central Valley riparian woodland and shrubland ecological system (from NatureServe website) for the canopy, shrub and nonwoody composition. Heights were estimated from the USDA Plants Database website. Used CDO 07 from photo series volume VII for tree density and dbh, woody, litter, duff. Aug 22, 2012 50 40 55 13 22 21.3 22459 40 19022 30 19370 30 20 35 3 7 5.1 28749 35 19249 30 22459 35 20 8 50 34786 85 28614 15 0 80 2 0.2 90 39369 40 508142 30 35460 30 5 0.02 22459 70 19370 30 0.2 0.3 0.1 0 0 0 22459 70 19370 30 0.1 0 0 55 0.7 1 100.0 0.5 50 1