The following is a list of senior thesis research projects directed or co-directed by Professor Johnson in the Environmental Geochemistry Laboratory.

2008

• Mr. Dylan Eberle (Geology): A 300 year record of lead deposition at Taylor Pond, Auburn, Maine. (Honorable Mention for Undergraduate Student Poster Competition at NE-GSA, Buffalo, March 2008; 5 awards made out of 132 posters)

• Mr. Greg Henkes (Biology): Mineral and isotopic geochemical evidence for environmental change in the shells of the smooth Greenland cockle, Serripes groenlandicus, from the Barents Sea (co-advised with Will Ambrose).

2007

• Mr. Carl Noblitt (Geology): Stable carbon and nitrogen isotopes in mollusk tissue and shell organic matter: potential tracers of primary production in the nearshore Gulf of Maine.

2006

• Ms. Erin Beirne (Geology, Honors), 2005. A Geochemical Investigation of Organic Matter Composition, Deposition, and Preservation at Sprague Marsh, Phippsburg, Maine.
• Mr. Morey Hallett (Geology), 2006. A 4,000 Year Record of Relative Sea Level Rise and Carbon Sequestration in the Webhannet Marsh, Wells, Maine.
• Mr. Seth Hubbard (Geology), 2006. A Recent History of Lead and Zinc Deposition in Four Maine Lakes.
• Ms. Hallie Preston (Environmental Studies) 2006.  Phosphorus Cycling in the Gulf Island Pond.

2005

• Ms. Kim Rodgers (Geology), 2005. Stable Carbon Isotope Analysis of Lake Core Sediments and Lipid Biomarkers as a Proxy for Late Pleistocene Carbon Cycling at Elikchan Lake, NE Siberia
• Mr. Daniel Frost (Geology), 2005. Paleoclimate Reconstruction Using Physical Sedimentology and Organic Matter Biogeochemistry of Varved Sediments, Basin Pond, Fayette, ME (co-advised with Mike Retelle)
• Mr. Kelton McMahon (Biology, Honors), 2005. Impacts of a Changing Food Supply on Arctic Benthos: Digestibility of Ice Algae and Phytoplankton (co-advised with Will Ambrose)

2004

• Ms. Anna Felton (Geology, Honors): Organic Carbon Cycling in Laminated Sediments from Coastal Lacustrine and Marine Environments, Eastern Canadian Arctic.
• Ms. Karen Moore (Geology): Investigation of Terrestrial Organic Carbon Cycling in Maine Coastal Environments through the last 3,000 Years.
• Ms. Rachel Booty (Environmental Studies): Soil Lead Determinations inThree Urban Community Gardens, Lewiston, Maine

2003

• Ms. Nicole Ouellette (Geology, Honors): Lipid Biomarkers and Paleovegetation eterminations of the last 30,000 Years at Elikchan Lake, Northeast Siberia.
• Mr. Jeff Burnap (Environmental Studies ‘03): Soil Quality:  An Investigation atWillow Pond Farm

2002

• Ms. Elizabeth Miller (Geology): A Study of the Surface Textures and Morphology of Quartz Grains Taken From the Northern Dune at the Wolfe Creek Crater, Western Australia.
• Ms. Bethany Thienel (Geology, Honors): Potential Remediation of Cu(II) and Zn(II) by Sorption on Aspen Wood Wool.
• Mr. Andrew Wilkie (Environmental Studies): A Modern Ecological Survey of the Wolfe Creek Crater Meteorite Impact Crater, NW Australia.