PMID: 11931452Apr 5, 2002Paper

Temporal and spatial variation of episodic wind erosion in unburned and burned semiarid shrubland

Journal of Environmental Quality
Jeffrey J WhickerJohn C Rodgers

Abstract

Redistribution of soil, nutrients, and contaminants is often driven by wind erosion in semiarid shrublands. Wind erosion depends on wind velocity (particularly during episodic, high-velocity winds) and on vegetation, which is generally sparse and spatially heterogeneous in semiarid ecosystems. Further, the vegetation cover can be rapidly and greatly altered due to disturbances, particularly fire. Few studies, however, have evaluated key temporal and spatial components of wind erosion with respect to (i) erosion rates on the scale of weeks as a function of episodic high-velocity winds, (ii) rates at unburned and burned sites, and (iii) within-site spatial heterogeneity in erosion. Measuring wind erosion in unburned and recently burned Chihuahuan desert shrubland, we found (i) weekly wind erosion was related more to daily peak wind velocities than to daily average velocities as consistent with our findings of a threshold wind velocity at approximately 7 m s(-1); (ii) greater erodibility in burned vs. unburned shrubland as indicated by erosion thresholds, aerodynamic roughness, and nearground soil movement; and (iii) burned shrubland lost soil from intercanopy and especially canopy patches in contrast to unburned shrubland, where ...Continue Reading

Citations

Apr 27, 2011·Ecological Applications : a Publication of the Ecological Society of America·Jason P FieldChris B Zou
Apr 19, 2006·The Science of the Total Environment·Jeffrey J WhickerCraig F Eberhart
Aug 28, 2014·Health Physics·Robert B Hayes, Mansour Akbarzadeh
Aug 12, 2017·Scientific Reports·Huawei PiJiaqiang Lei

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