The role of fire on soil mounds and surface roughness in the Mojave Desert
Version of Record online: 20 MAY 2012
Published in 2012 by John Wiley and Sons, Ltd.
Earth Surface Processes and Landforms
Volume 38, Issue 2, pages 111–121, February 2013
How to Cite
Soulard, C. E., Esque, T. C., Bedford, D. R. and Bond, S. (2013), The role of fire on soil mounds and surface roughness in the Mojave Desert. Earth Surf. Process. Landforms, 38: 111–121. doi: 10.1002/esp.3264
- Issue online: 23 JAN 2013
- Version of Record online: 20 MAY 2012
- Accepted manuscript online: 27 APR 2012 05:36PM EST
- Manuscript Accepted: 25 APR 2012
- Manuscript Revised: 20 APR 2012
- Manuscript Received: 18 NOV 2011
- Mojave Desert;
- surface roughness;
A fundamental question in arid land management centers on understanding the long-term effects of fire on desert ecosystems. To assess the effects of fire on surface topography, soil roughness, and vegetation, we used terrestrial (ground-based) LiDAR to quantify the differences between burned and unburned surfaces by creating a series of high-resolution vegetation structure and bare-earth surface models for six sample plots in the Grand Canyon-Parashant National Monument, Arizona. We find that 11 years following prescribed burns, mound volumes, plant heights, and soil-surface roughness were significantly lower on burned relative to unburned plots. Results also suggest a linkage between vegetation and soil mounds, either through accretion or erosion mechanisms such as wind and/or water erosion. The biogeomorphic implications of fire-induced changes are significant. Reduced plant cover and altered soil surfaces from fire likely influence seed residence times, inhibit seed germination and plant establishment, and affect other ecohydrological processes. Published in 2012. This article is a US Government work and is in the public domain in the USA.