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Element Use and Acquisition Strategies in Biological Soil Crusts


Abstract Biological soil crusts (BSCs) are critical components of arid and semiarid environments and provide the primary sources of bioavailable macronutrients and increase micronutrient availability to their surrounding ecosystems. BSCs are composed of a variety of microorganisms that perform a wide range of physiological processes requiring a multitude of bioessential micronutrients, such as iron, copper, and molybdenum. This work investigated the effects of BSC activity on soil solution concentrations of bioessential elements and examined the microbial production of organic chelators, called siderophores. I found that aluminum, vanadium, copper, zinc, and molybdenum were solubilized in the action of crusts, while nickel, zinc, arsenic, and zircon... (more)
Created Date 2012
Contributor Noonan, Kathryn Alexander (Author) / Hartnett, Hilairy (Advisor) / Anbar, Ariel (Committee member) / Garcia-Pichel, Ferran (Committee member) / Shock, Everett (Committee member) / Sharp, Thomas (Committee member) / Arizona State University (Publisher)
Subject Biogeochemistry / Geochemistry / Geobiology / biological soil crusts / nitrogen fixation / siderophores / trace metals
Type Doctoral Dissertation
Extent 274 pages
Language English
Copyright
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Note Ph.D. Geological Sciences 2012
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis