bacteria feed on Spirogyra

carlos.uruguay · Post by **carlos.uruguay** » Mon Dec 21, 2015 6:17 am

Wim van Egmond wrote:Thank you for the comments, Martin, that may be an idea, but doesn't Beggiotoa make very long filaments? These are not very long. And their mass is brownish.
Wim

Hi Wim.
Have You seen the web page that I quoted?
Around Spirogyra is a great production of oxygen, therefore be ruled out Beggiatoa, but not other genera of cyanobacteria
Regards

Wim van Egmond · Post by **Wim van Egmond** » Mon Dec 21, 2015 7:17 am

Thank you Carlos, you posted when I was writing my last comment!

Yes, that is an interesting page. I can only find filamentous bacteria and I did nto0 see any that look like the bacteria in these images. My sample was not sludge but a much more nutrient poor invironment.

best regards,

Wim

Ernst Hippe · Post by **Ernst Hippe** » Mon Dec 21, 2015 11:16 am

Hallo Wim,
some years ago I found the same brownish formation of bacteria, also moving very slowly in broad rope form up to 2mm length, often branched on the sides. The "individuals" were ca.7µm long.
They came from a mountain moor in Austria and lived a few days in my Petry dish. There were many Desmids (no Spirogyra) in my probe, but not attacked by the bacteria.
After some discussions I tried to identify them as Methanobacteria, but with doubts.
Congrats to your film in the other thread!
Greetings
Ernst

Martin Kreutz · Post by **Martin Kreutz** » Mon Dec 21, 2015 12:31 pm

Hi Wim,

you are right, the most species of Beggiotoa forms long filaments. But these long filaments are consist of many separate cells. For the common species B. alba the dimension of a single cell is (about) 2.5 X 5 µm. Your species seems to occur in single cells and not as a chain of cells separated by cell walls. I don't know if Beggiotoa can occur in single cells depending on the enviromental conditions. But what could be the alternative for moving cells with sulphur inclusions? I'm very curious for other ideas.

Martin

Wim van Egmond · Post by **Wim van Egmond** » Tue Dec 22, 2015 4:50 am

Thank you for your extensive reactions.

Martin. I have made measurements from the pictures and if I have my calculations right the cells are between 12 and 14,5 micron long and about 1,2 micro wide. They are not as white as the Beggiatoa I have seen.

Ernst, that sounds interesting! Do you have images of them? This sample was from a peat moor and it did contain desmids as well as short filaments of Spirogyra, not the thick mass from more nutrient rich ditches.

And more than one of the strands were attacked by these bacteria. It was not one incident. There were many of these brown blobs in the sample, also separate from Spirogyra. They were easy to see with the stereomicroscope.

Wim

for convenience, here is a link to the movie: https://vimeo.com/149651283

Ecki · Post by **Ecki** » Tue Dec 22, 2015 8:19 am

Wim,

Most interesting catch and beautifully recorded, as always. I sent some researches links to this post. Let's see if someone can make sense of it.

Social bacteria

Best regards,
Ecki

Ernst Hippe · Post by **Ernst Hippe** » Tue Dec 22, 2015 8:40 am

Here are 3 old pics. 1 is 400x, rather blurred, sorry

Wim van Egmond · Post by **Wim van Egmond** » Tue Dec 22, 2015 8:43 am

Thanks Ecki,

Well, social... From a Spirogyra point of view they can also be regarded as hooligan bacteria.

Ernst, thank you for the images! these could very well be the same!

Wim

BugEZ · Post by **BugEZ** » Sun Dec 27, 2015 9:36 am

Wow! What great time lapse of the critters on the stalks. Thanks for sharing.

I also watched several other time lapse on the Vimeo site. Nicely done!

Keith

carlos.uruguay · Post by **carlos.uruguay** » Sun Dec 27, 2015 2:05 pm

The Order Cytophagales - fixed link
http://link.springer.com/content/pdf/10 ... 1-1_37.pdf

Pau · Post by **Pau** » Sun Dec 27, 2015 2:49 pm

carlos.uruguay wrote:The Order Cytophagales
http://link.springer.com/content/pdf/10 ... 2191-1.pdf

The link does not provide a readable pdf file, is it a suscription protected paper?

rjlittlefield · Post by **rjlittlefield** » Sun Dec 27, 2015 3:38 pm

I got a readable PDF, but quite large: 223 MB, 1192 pages.

Carlos, is there something specific in this book that you want to point out?

--Rik

carlos.uruguay · Post by **carlos.uruguay** » Sun Dec 27, 2015 4:13 pm

rjlittlefield wrote:I got a readable PDF, but quite large: 223 MB, 1192 pages.

Carlos, is there something specific in this book that you want to point out?

--Rik

Hi Rik
I just found it interesting to submit material for this group of bacteria
because I think it may be related to what Wim filmed.
Maybe I copied the link wrong, I mean only the chapter to the Order Cytophagales
I will try to fix the link
I've corrected the link, now only refers to that chapter

carlos.uruguay · Post by **carlos.uruguay** » Sun Dec 27, 2015 4:24 pm

Pau wrote:
carlos.uruguay wrote:The Order Cytophagales
http://link.springer.com/content/pdf/10 ... 2191-1.pdf
The link does not provide a readable pdf file, is it a suscription protected paper?

Sorry Pau
I corrected the link

Pau · Post by **Pau** » Mon Dec 28, 2015 2:41 am

Thanks, now it works.