1. Dissimilatory Iron(III) Reducing Bacteria Camille Jones Hopkins Microbiology Course 2012

2. What do they do? Image: Pacific Northwest National Laboratory Simple Fermentation Products + Fe(OH) 3  Fe 2+ + HCO 3 - Shewanella sp.

3. Who are they? Lovley, DR, Holmes, DE, Nevin, KP. 2004. Dissimilatory Fe(III) and Mn(IV) Reduction. Advances in Microbial Physiology

4. How do you isolate them? Images: Katrin Richter and Camille Jones t = 0 t = initial t = transfer Ferrihydrite Magnetite Lactate Fe(III)- hydroxide No O 2

5. 2012 HMC Results

6. Environmental Connections Links with nitrogen (N) and uranium (U) cycles Promotion of arsenic (As) contamination Aromatic hydrocarbon contaminant degradation Microbial fuel cells

7. Niche: High Fe(III) No other e- acceptors Fitness Environmental Dynamics Shewanella sp. Geobacter sp. Evolutionary Ecological Selection