Morphology of biogenic iron oxides records microbial physiology and environmental conditions: toward interpreting iron microfossils
Article first published online: 24 JUN 2013
© 2013 John Wiley & Sons Ltd
Volume 11, Issue 5, pages 457–471, September 2013
How to Cite
Krepski, S. T., Emerson, D., Hredzak-Showalter, P. L., Luther, G. W. and Chan, C. S. (2013), Morphology of biogenic iron oxides records microbial physiology and environmental conditions: toward interpreting iron microfossils. Geobiology, 11: 457–471. doi: 10.1111/gbi.12043
- Issue published online: 14 AUG 2013
- Article first published online: 24 JUN 2013
- Manuscript Accepted: 13 MAY 2013
- Manuscript Received: 15 FEB 2013
- NASA EPSCoR/RID. Grant Number: NNX07AT51A
- NASA Exobiology. Grant Number: NNX12AG20G
- NASA EPSCoR. Grant Number: 10-EPSCoR-0005
Fig. S1 Phase contrast micrograph of granular oxides in uninoculated control microslide.
Fig. S2 Phase contrast micrograph of Mariprofundus ferrooxydans stalk band in a microslide with directionality histograms for five contiguous areas. The far left image shows stalks in front of (outside of) the band. Higher oxygen is to the left and higher Fe(II) is to the right. Gaussian goodness of fit is reported, and for good fits, dispersion is reported. Stalks within the band are directional (good Gaussian fit) while stalks outside the band do not exhibit directional orientation (poor Gaussian fit).
Fig. S3 Bright field micrograph of microfossils in a thin section from the ~170 Ma hydrothermal Fe-Si deposit. Directionality was analyzed for five areas (delineated by blue boxes), including areas within and outside of bands. See Supplementary Fig. 4 for analyses.
Fig. S4 Bright field micrographs of microfossils (see Supplementary Fig. 3) with directionality histograms. Gaussian goodness of fit is reported, and for good fits, dispersion is reported. As with Mariprofundus ferrooxydans cultures, microfossils within the band (A, B, C) are directional (good Gaussian fit) while stalks outside the band (D, E) do not exhibit directional orientation (poor Gaussian fit). Note that while microfossil orientation may not be apparent to the eye in C, this analysis can detect and quantify directionality.
|gbi12043-sup-0002-FigS1-S4.pdf||application/PDF||3107K||Video S1 Time-lapse bright field microscope image series of Mariprofundus ferrooxydans stalk band formation in a microslide. Time interval =15 min; total time =5 h 45 min. The oxygen source is on the left; FeS on the right. In this slide, the band was angled due to some oxygen leaking through the microslide side wall (top of image).|
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