IUBio

Hydrogen Sulfide and Cyanobacteria

William J. Mason wmason at COMP.UARK.EDU
Fri Oct 30 08:23:18 EST 1998


Mateo,

What about bacteria such as:
Salmonella, Arizona, Edwardsiella and Proteus
Somespecies of these types are all capable of producing H2S; yet, I do not
know of their distribution in the soil.

Jeff Mason
University of Arkansas, Biological Sciences/Microbiology
wmason at comp.uark.edu
http://comp.uark.edu/~wmason

On Fri, 30 Oct 1998 aquastrat at red2000.com.mx wrote:

> As far as I knew, a salt water shrimp culture pond bottom’s natural brown
> color sometimes turns black  because the insoluble ferric form of iron
> becomes reduced to black ferrous form under anoxic conditions (caused by
> sedimentation of organic matter),  meaning that the black color was in the
> inorganic part of the substrate, then yesterday I had my hands full of what
> seemed to be a decomposing mass of cyanobacteria and it had the same hydrogen
> sulfide smell and black color than the apparently inorganic part of the soil.
> ¿Does the black color and hydrogen sulfide smell comes also from the
> decomposing cyanobacteria?. Some cyanobacteria use reduced sulfur compounds
> in their energetic metabolism, ¿Does this means that when they die they
> create a bigger problem deteriorating the bottom conditions because they
> increase the amount of hydrogen sulfide more than when a diatom bloom
> crashes? In my experience it is clear that oxidizing the black substrate
> (turning it over several times to expose it to air) returns the soil its
> naturally brown color but ¿Does this soil has more propensity to produce in
> the future hydrogen sulfide in larger quantities than before it experienced
> this problem?
> 
> I thank you beforehand for your kind help.
> 
> Mateo Avila
> 
> -----------== Posted via Deja News, The Discussion Network ==----------
> http://www.dejanews.com/       Search, Read, Discuss, or Start Your Own    
> 
> 




More information about the Microbio mailing list

Send comments to us at biosci-help [At] net.bio.net