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Effect of cyanobacterial growth on biotite surfaces under laboratory nutrient-limited conditions

Published online by Cambridge University Press:  05 July 2018

D. Kapitulčinova ,
C. S. Cockell ,
K. R. Hallam  and
K. V. Ragnarsdottir
D. Kapitulčinova*
Affiliation:
Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queen’s Road, Bristol BS8 1RJ, UK Interface Analysis Centre, University of Bristol, Oldbury House, 121 St. Michael’s Hill, Bristol, BS2 8BS, UK
C. S. Cockell
Affiliation:
CEPSAR, Open University, Milton Keynes MK7 6AA, UK
K. R. Hallam
Affiliation:
Interface Analysis Centre, University of Bristol, Oldbury House, 121 St. Michael’s Hill, Bristol, BS2 8BS, UK
K. V. Ragnarsdottir
Affiliation:
Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queen’s Road, Bristol BS8 1RJ, UK
*
*E-mail: [email protected]
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Abstract

Laboratory experiments with two cyanobacterial strains grown on low-nutrient agar media in the presence of biotite flakes were performed in order to reveal possible mechanisms and rates of cyanobacterial bioweathering. Both cyanobacteria colonized the biotite flakes. Leptolyngbya grew mostly in the biotite interlayers, whereas Hassallia colonized the sides and the topmost surface of the biotite flakes. After a 3-month incubation, rounded features including cyanobacterium-shaped pits were observed on the biotite surface cleared of the organic material. No such features were observed on flakes incubated for 1 month.

Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 71 - 75
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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