• Geomorphology and the Distributional Ecology of Fremont Cottonwood (Populus fremontii) in a Desert Riparian Canyon

      Asplund, Kenneth K.; Gooch, Michael T.; Prescott College (University of Arizona (Tucson, AZ), 1988)
      DBH data were taken from Fremont Cottonwood (Populus fremontii) in a desert riparian canyon in west -central Arizona. Recruitment was found to depend on geomorphologic features and flood "refugia" rather than on the absence of grazing. Populus fremontii is specifically a "strandline," streamside species, particularly of braided aggradations and their associated secondary channels, a microhabitat that ultimately depends on upstream and upslope erosion. The concept of flood -subclimax succession explains virtually nothing of the ecology of obligate riparian trees. Riparian classification based upon geomorphology and hydrology are apt to have significant meaning for biogeography and management.