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

Reynolds, Richard L.; Belnap, Jayne; Reheis, Marith C.; Lamothe, Paul J.; Luiszer, Fred

doi:10.1073/pnas.121094298

Cited by 334 publications

(241 citation statements)

References 42 publications

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“…Ti and Zr are chemically immobile (Winchester and Floyd 1977) under most post-depositional lacustrine chemical conditions and thus provide a measure of initial abundance of certain heavy minerals, such as FeTi oxides (e.g., titanomagnetite and ilmenite) and zircon. Moreover, Zr/Ti is a useful parameter by which to gauge possible changes in provenance (Muhs 1983;Muhs et al 1990;Kerwin 1996;Reynolds et al 2001). For example, Zr/Ti increases over a range in rock types from mafic (e.g., basalt) to more silicic (e.g., rhyodacite).…”

Section: Methodsmentioning

confidence: 99%

Record of Late Pleistocene Glaciation and Deglaciation in the Southern Cascade Range. I. Petrological Evidence from Lacustrine Sediment in Upper Klamath Lake, Southern Oregon

Reynolds

Rosenbaum

Rapp

et al. 2004

Journal of Paleolimnology

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Petrological and textural properties of lacustrine sediments from Upper Klamath Lake, Oregon, reflect changing input volumes of glacial flour and thus reveal a detailed glacial history for the southern Cascade Range between about 37 and 15 ka. Magnetic properties vary as a result of mixing different amounts of the highly magnetic, glacially generated detritus with less magnetic, more weathered detritus derived from unglaciated parts of the large catchment. Evidence that the magnetic properties record glacial flour input is based mainly on the strong correlation between bulk sediment particle size and parameters that measure the magnetite content and magnetic mineral freshness. High magnetization corresponds to relatively fine particle size and lower magnetization to coarser particle size. This relation is not found in the Buck Lake core in a nearby, unglaciated catchment. Angular silt-sized volcanic rock fragments containing unaltered magnetite dominate the magnetic fraction in the late Pleistocene sediments but are absent in younger, low magnetization sediments. The finer grained, highly magnetic sediments contain high proportions of planktic diatoms indicative of cold, oligotrophic limnic conditions. Sediment with lower magnetite content contains populations of diatoms indicative of warmer, eutrophic limnic conditions. During the latter part of oxygen isotope stage 3 (about 37-25 ka), the magnetic properties record millennial-scale variations in glacial-flour content. The input of glacial flour was uniformly high during the Last Glacial Maximum, between about 21 and 16 ka. At about 16 ka, magnetite input, both absolute and relative to hematite, decreased abruptly, reflecting a rapid decline in glacially derived detritus. The decrease in magnetite transport into the lake preceded declines in pollen from both grass and sagebrush. A more gradual decrease in heavy mineral content over this interval records sediment starvation with the growth of marshes at the margins of the lake and dilution of detrital material by biogenic silica and other organic matter.

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Section: Methodsmentioning

confidence: 99%

Record of Late Pleistocene Glaciation and Deglaciation in the Southern Cascade Range. I. Petrological Evidence from Lacustrine Sediment in Upper Klamath Lake, Southern Oregon

Reynolds

Rosenbaum

Rapp

et al. 2004

Journal of Paleolimnology

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“…dust bowls and desertification; see [7,8]), have contributed to the general public's impression that drylands are unproductive and 'useless' ecosystems, both from the ecological and socio-economical points of view [9].…”

Section: Dryland Ecosystems: Definition and Importancementioning

confidence: 99%

It is getting hotter in here: determining and projecting the impacts of global environmental change on drylands

Maestre

Salguero‐Gómez

Quero

2012

Phil. Trans. R. Soc. B

271

209

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Drylands occupy large portions of the Earth, and are a key terrestrial biome from the socio-ecological point of view. In spite of their extent and importance, the impacts of global environmental change on them remain poorly understood. In this introduction, we review some of the main expected impacts of global change in drylands, quantify research efforts on the topic, and highlight how the articles included in this theme issue contribute to fill current gaps in our knowledge. Our literature analyses identify key under-studied areas that need more research (e.g. countries such as Mauritania, Mali, Burkina Faso, Chad and Somalia, and deserts such as the Thar, Kavir and Taklamakan), and indicate that most global change research carried out to date in drylands has been done on a unidisciplinary basis. The contributions included here use a wide array of organisms (from micro-organisms to humans), spatial scales (from local to global) and topics (from plant demography to poverty alleviation) to examine key issues to the socio-ecological impacts of global change in drylands. These papers highlight the complexities and difficulties associated with the prediction of such impacts. They also identify the increased use of long-term experiments and multidisciplinary approaches as priority areas for future dryland research. Major advances in our ability to predict and understand global change impacts on drylands can be achieved by explicitly considering how the responses of individuals, populations and communities will in turn affect ecosystem services. Future research should explore linkages between these responses and their effects on water and climate, as well as the provisioning of services for human development and well-being.

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“…A large number of studies have confirmed that dust deposition played an important role in soil formation of semi-arid and semi-humid lands (Cattle et al, 2002;Derry and Chadwick, 2007;Gustavson and Holliday, 1999;Johnston, 2001;McIntosh et al, 2004;Tiller et al, 1987;Wen et al, 2002). Some studies have demonstrated that dust fall can enrich various nutrients (P, K, Mg, Na, Ca, Fe, Cu, Mn and Mo) in surface soil (Reynolds et al, 2001;Wen et al, 2002) and that the increase of certain elements indirectly influences the utility efficiency of other elements. For example, carbonate influences the biological efficiency of Na, P, K and Mg, while both Mo and P are essential to the N-fixation process (Reynolds et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Some studies have demonstrated that dust fall can enrich various nutrients (P, K, Mg, Na, Ca, Fe, Cu, Mn and Mo) in surface soil (Reynolds et al, 2001;Wen et al, 2002) and that the increase of certain elements indirectly influences the utility efficiency of other elements. For example, carbonate influences the biological efficiency of Na, P, K and Mg, while both Mo and P are essential to the N-fixation process (Reynolds et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Effect of vegetation coverage on aeolian dust accumulation in a semiarid steppe of northern China

Xin

et al. 2011

CATENA

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

Cited by 334 publications

References 42 publications

Record of Late Pleistocene Glaciation and Deglaciation in the Southern Cascade Range. I. Petrological Evidence from Lacustrine Sediment in Upper Klamath Lake, Southern Oregon

Record of Late Pleistocene Glaciation and Deglaciation in the Southern Cascade Range. I. Petrological Evidence from Lacustrine Sediment in Upper Klamath Lake, Southern Oregon

It is getting hotter in here: determining and projecting the impacts of global environmental change on drylands

Effect of vegetation coverage on aeolian dust accumulation in a semiarid steppe of northern China

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