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"black" algae

BOB MCLEAN RM12 at swt.edu
Thu Nov 20 19:36:53 EST 1997

The "black algae" encountered during photography, may actually be a biofilm. 
This would account for the slime production.  The black coloration may arise
from the silver ions (Ag+ arising from photography) binding to the anionic
polymers within the biofilm.  A recent review on metal binding by bacterial
biofilms, etc can be found in:

R.J.C. McLean, D. Fortin, and D.A. Brown. Microbial metal-binding mechanisms
and their relation to nuclear waste disposal.  Can. J. Microbiol. 42: 392-400.

I hope this is helpful.

Bob McLean
Dept. Biology
Southwest Texas State University
San Marcos, Tx 78666
(512)245-3365 phone
(512)245-8713 FAX
Email:  RM12 at swt.edu

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