Rebecca Halvorson, University of Wisconsin, La Crosse

Class Year:

2006

Mentor:

Jeffrey Cornwell, Ph.D.

Project Title:

Phosphorus Eycling in Estuarine Sediments: pH and Redox Contributions to Phosphorus Fluxes in the Corsica River, Maryland

Abstract:

The release of phosphate from Corsica river sediments is influenced by benthic organisms and redox status, specifically iron and sulfur biogeochemistry. Sediment-water column exchanges are less in 2006 than in 2001 at certain sites of the Corsica River though phosphate continues to flux out of the sediments. Differences in exchange data between sites may be influenced by variations in pH. History of the Corsica River includes periods of nutrient loading, and long core data suggests retention of phosphorus in these sediments. Iron oxyhydroxides and pyrite formation largely control retention of phosphorus in sediments.

Presentations

Palinkas, C., J. Cornwell, C. LeBeau, and R. Halvorson*. 2006. Geochemistry of recent (<100 y) sediments in the Corsica River. Geological Society of America Annual Meeting, Philadephia, Pennsylvania.

The REU students are indicated with an asterisk (*).

The Blue Crab: Callinectes Sapidus

An essential resource for researchers, students, and managers.  Get your copy today!

pile of cooked crabs

5825 University Research Court, Suite 1350 | College Park, MD 20740 | Phone: (301) 405-7500 | Fax: (301) 314-5780 | Contact Us

  • Twitter
  • Facebook
  • YouTube
  • Flickr
  • RSS