Aeolian dust in Colorado Plateau soils: Nutrient inputs and recent change in source

Aeolian dust (windblown silt and clay) is an important component in arid-land ecosystems because it may contribute to soil formation and furnish essential nutrients. Few geologic surfaces, however, have been characterized with respect to dust-accumulation history and resultant nutrient enrichment. We have developed a combination of methods to identify the presence of aeolian dust in arid regions and to evaluate the roles of this dust in ecosystem processes. Unconsolidated sandy sediment on isolated surfaces in the Canyonlands region of the Colorado Plateau differs greatly in mineralogical and chemical composition from associated bedrock, mainly aeolian sandstone. Detrital magnetite in the surficial deposits produces moderately high values of magnetic susceptibility, but magnetite is absent in nearby bedrock. A component of the surficial deposits must be aeolian to account for the abundance of magnetite, which formed originally in far-distant igneous rocks. Particle-size analysis suggests that the aeolian dust component is typically as much as 20–30%. Dust inputs have enriched the sediments in many elements, including P, Mg, Na, K, and Mo, as well as Ca, at sites where bedrock lacks calcite cement. Soil-surface biologic crusts are effective dust traps that apparently record a change in dust sources over the past several decades. Some of the recently fallen dust may result from human disturbance of land surfaces that are far from the Canyonlands, such as the Mojave Desert. Some land-use practices in the study area have the potential to deplete soil fertility by means of wind-erosion removal of aeolian silt.

[1]  Donald Robert Coates,et al.  Thresholds in Geomorphology , 2020 .

[2]  C. Weng,et al.  Late Glacial and Holocene vegetation history and paleoclimate of the Kaibab Plateau, Arizona , 1999 .

[3]  James A. Young,et al.  Aeolian dust in a saline playa environment, Nevada, U.S.A , 1999 .

[4]  P. Vitousek,et al.  Changing sources of nutrients during four million years of ecosystem development , 1999, Nature.

[5]  G. Lovett,et al.  ATMOSPHERIC DEPOSITION TO A DESERT ECOSYSTEM AND ITS IMPLICATIONS FOR MANAGEMENT , 1998 .

[6]  Jayne Belnap,et al.  DISTURBANCE OF BIOLOGICAL SOIL CRUSTS: IMPACTS ON POTENTIAL WIND ERODIBILITY OF SANDY DESERT SOILS IN SOUTHEASTERN UTAH , 1997 .

[7]  P. Loveland,et al.  Magnetic susceptibility of soil: an evaluation of conflicting theories using a national data set , 1996 .

[8]  G. Flerchinger,et al.  Application of a soil-water balance model to evaluate the influence of Holocene climate change on calcic soils, Mojave Desert, California, U.S.A. , 1996 .

[9]  R. Reynolds,et al.  Record of middle Pleistocene climate change from Buck Lake, Cascade Range, southern Oregon—Evidence from sediment magnetism, trace-element geochemistry, and pollen , 1996 .

[10]  Thomas E. Gill,et al.  Eolian sediments generated by anthropogenic disturbance of playas: human impacts on the geomorphic system and geomorphic impacts on the human system , 1996 .

[11]  Andrew J. Bach,et al.  TEMPORAL AND SPATIAL ASPECTS OF BLOWING DUST IN THE MOJAVE AND COLORADO DESERTS OF SOUTHERN CALIFORNIA, 1973–1994 , 1996 .

[12]  J. A. Young,et al.  Pedogenesis on talus slopes, the Buckskin range, Nevada, USA , 1996 .

[13]  Thomas K. Rockwell,et al.  Quaternary soils and dust deposition in southern Nevada and California , 1995 .

[14]  M. Reheis,et al.  Dust deposition in southern Nevada and California, 1984-1989: Relations to climate, source area, and source lithology , 1995 .

[15]  Murray Gray,et al.  Global Climates since the Last Glacial Maximum , 1994 .

[16]  J. Whitney,et al.  Relict colluvial boulder deposits as paleoclimatic indicators in the Yucca Mountain region, southern Nevada , 1993 .

[17]  J. Banfield.  Oxide minerals: Petrologic and magnetic significance reviews in mineralogy 25: edited by Donald H. Lindsley. 1991. Mineralogical Society of America, 1991, xiv + 509p., US $24.00 (ISBN 0-939950-30-8) , 1992 .

[18]  J. Betancourt,et al.  First Know Your Packrat@@@Packrat Middens: The Last 40,000 years of Biotic Change. , 1991 .

[19]  Paul S. Martin,et al.  Packrat Middens the Last 40, 000 Years of Biotic Change , 1991 .

[20]  M. Reheis.  Influence of climate and eolian dust on the major-element chemistry and clay mineralogy of soils in the northern Bighorn basin, U.S.A. , 1990 .

[21]  D. Muhs,et al.  Geochemical Evidence of Saharan Dust Parent Material for Soils Developed on Quaternary Limestones of Caribbean and Western Atlantic Islands , 1990, Quaternary Research.

[22]  O. Chadwick,et al.  Soil-forming intervals caused by eolian sediment pulses in the Lahontan basin, northwestern Nevada , 1990 .

[23]  W. Schlesinger,et al.  The Biogeochemistry of Phosphorus Cycling and Phosphorus Availability Along a Desert Soil Chronosequence , 1988 .

[24]  S. Wells,et al.  Influences of eolian and pedogenic processes on the origin and evolution of desert pavements , 1987 .

[25]  S. Wells,et al.  Influence of Late Quaternary Climatic Changes on Geomorphic and Pedogenic Processes on a Desert Piedmont, Eastern Mojave Desert, California , 1987, Quaternary Research.

[26]  S. Wells,et al.  Influences of quaternary climatic changes on processes of soil development on desert loess deposits of the Cima volcanic field, California , 1986 .

[27]  S. Wells,et al.  Late Cenozoic landscape evolution on lava flow surfaces of the Cima volcanic field , 1985 .

[28]  D. Muhs.  Airborne dust fall on the California Channel Islands, U.S.A. , 1983 .

[29]  J. Prospero,et al.  Atmospheric transport of soil dust from Africa to South America , 1981, Nature.

[30]  A. Goudie.  Dust storms and their geomorphological implications , 1978 .

[31]  D. H. Yaalon,et al.  THE INFLUENCE OF DUST ON SOILS DURING THE QUATERNARY , 1973 .

[32]  H. E. Wright,et al.  Present and Past Vegetation of the Chuska Mountains, Northwestern New Mexico , 1973 .

[33]  R. Clayton,et al.  Geomorphological Relationships of Tropospherically Derived Quartz in the Soils of the Hawaiian Islands , 1971 .

[34]  D. Marchand.  Soil Contamination in the White Mountains, Eastern California , 1970 .

[35]  Donald H. Lindsley,et al.  Oxide minerals : petrologic and magnetic significance , 1991 .

[36]  W. Silvester.  Molybdenum limitation of asymbiotic nitrogen fixation in forests of Pacific Northwest America , 1989 .

[37]  Paul T. Tueller,et al.  Vegetation science applications for rangeland analysis and management , 1988, Handbook of vegetation science.

[38]  K. Pye.  Aeolian dust and dust deposits , 1987 .

[39]  William G. Nickling,et al.  Dust storms and their relation to moisture in the Sonoran-Mojave desert region of the south-western United States , 1987 .

[40]  P. Lipman,et al.  Calderas of the San Juan volcanic field, southwestern Colorado , 1975 .