A selection of cyanobacteria (blue-green algae)

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tlansing
Posts: 336
Joined: Sat Aug 01, 2020 3:15 pm

A selection of cyanobacteria (blue-green algae)

#1 Post by tlansing » Fri Jun 24, 2022 8:35 pm

I thought I would share some photos of several different and interesting cyanobacteria that I have observed over the past months. Many of these have population explosions (blooms) in the spring and summer in ponds leading to very large numbers of these cyanobacteria and production of toxins. Several of these have names that are quite a mouthful. Recently, I have seen blooms of Aphanizomenon in several of my local lakes and ponds. So, here are some photos:
Aphanizomenon: These form clumps of roughly parallel strands of cells, as in the first photo. In the second photo, some detail of a single strand can be seen, including the bulbous heterocyst, where nitrogen fixation takes place.
Aphanizomenon-1.JPG
Aphanizomenon-1.JPG (45.17 KiB) Viewed 989 times
Aphanizomenon-2.jpg
Aphanizomenon-2.jpg (64.96 KiB) Viewed 989 times
Merismopedia: This cyanobacterium forms sheet-like colonies of cells in which the cells are mucilaginous matrix.
Merismopedia.JPG
Merismopedia.JPG (91.74 KiB) Viewed 989 times
Dolichospermum: The cells of this cyanobacterium form spirals with a mucilaginous coating. Two heterocysts are also visible.
Dolichospermum.JPG
Dolichospermum.JPG (55.29 KiB) Viewed 989 times
Nostoc: I'm sure everyone has seen this one, but I like the arrangement of the filaments of cells in this picture. Heterocysts are also visible in this cyanobacterium.
Nostoc.JPG
Nostoc.JPG (72.97 KiB) Viewed 989 times

Alexander
Posts: 402
Joined: Fri Jun 11, 2021 7:10 pm

Re: A selection of cyanobacteria (blue-green algae)

#2 Post by Alexander » Fri Jun 24, 2022 9:36 pm

Nice!

Javier
Posts: 806
Joined: Tue May 09, 2017 11:19 am
Location: Buenos Aires, Argentina.

Re: A selection of cyanobacteria (blue-green algae)

#3 Post by Javier » Fri Jun 24, 2022 10:44 pm

Beautiful images!

Hobbyst46
Posts: 4277
Joined: Mon Aug 21, 2017 9:02 pm

Re: A selection of cyanobacteria (blue-green algae)

#4 Post by Hobbyst46 » Sat Jun 25, 2022 8:19 am

Beautiful !


tlansing
Posts: 336
Joined: Sat Aug 01, 2020 3:15 pm

Re: A selection of cyanobacteria (blue-green algae)

#6 Post by tlansing » Sat Jun 25, 2022 12:51 pm

Alexander, Javier, Hobbyst46 and Jochen: thanks for your nice comments!

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