Skip to main content

Biogeochemistry Science and Education; Part One: Using Non-Traditional Stable Isotopes as Environmental Tracers; Part Two: Identifying and Measuring Undergraduate Misconceptions in Biogeochemistry


Abstract This dissertation is presented in two sections. First, I explore two methods of using stable isotope analysis to trace environmental and biogeochemical processes. Second, I present two related studies investigating student understanding of the biogeochemical concepts that underlie part one. Fe and Hg are each biogeochemically important elements in their own way. Fe is a critical nutrient for phytoplankton, while Hg is detrimental to nearly all forms of life. Fe is often a limiting factor in marine phytoplankton growth. The largest source, by mass, of Fe to the open ocean is windblown mineral dust, but other more soluble sources are more bioavailable. To look for evidence of these non-soil dust sources of Fe to the open ocean, I measured the... (more)
Created Date 2014
Contributor Mead, Chris (Author) / Anbar, Ariel (Advisor) / Semken, Steven (Committee member) / Shock, Everett (Committee member) / Herckes, Pierre (Committee member) / Hartnett, Hilairy (Committee member) / Arizona State University (Publisher)
Subject Biogeochemistry / Environmental science / Science education / Biogeochemistry / Isotopes / Misconceptions
Type Doctoral Dissertation
Extent 148 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Ph.D. Geological Sciences 2014
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


  Full Text
5.0 MB application/pdf
Download Count: 2402

Description Dissertation/Thesis