File:Cyanobacteria - Nostoc pruniforme - geograph.org.uk - 1470400.jpg
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Cyanobacteria - Nostoc pruniforme
Summary
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| Description |
Cyanobacteria - Nostoc pruniforme These rounded structures were present in abundance in some puddles; the area where the puddles occurred corresponds to the snow-covered foreground area of the following photo: 1158049. The blobs in this photo clearly show some variation in size, but the largest are about a centimetre across. They are colonies of cyanobacteria (which used to be referred to as "blue-green algae"); unusually for bacteria, cyanobacteria perform photosynthesis, although the structures involved are not bound within chloroplasts as they are in plant cells. The species shown here is Nostoc pruniforme, and the blobs are sometimes referred to as Mare's Eggs. 1314485 shows some less typical-looking colonies, but provides more details on this species, and on Nostoc in general. [See http://www.algaebase.org/search/species/detail/?species_id=32582 (at Algaebase) for detailed taxonomic information, and for other pictures.] Of interest is the fact that the area where the present photo was taken is rich in fragments of concrete, while the alternative photograph (link just cited) shows colonies growing on limestone, suggesting that these cyanobacteria prefer a lime-rich habitat; this is indeed the case. The concrete fragments here provide an environment that resembles natural limestone sufficiently closely to allow the colonies to flourish. Although this species was abundant in puddles in this area, the ground nearby was covered in an even greater abundance of another Nostoc species, one that I had not encountered before: 1470398.[Note: Cyanobacteria are bacteria, not algae, but the existing image category of "Algae" was chosen for convenience.] |
| Date | |
| Source | From geograph.org.uk |
| Author | Lairich Rig |
| Attribution (required by the license) | Lairich Rig / Cyanobacteria - Nostoc pruniforme / |
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| Camera location |   | View this and other nearby images on: OpenStreetMap |  |
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| Object location | | View this and other nearby images on: OpenStreetMap | |
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Licensing
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This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Lairich Rig and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Lairich Rig
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 11:32, 2 March 2011 | | 640 × 480 (83 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Cyanobacteria - Nostoc pruniforme These rounded structures were present in abundance in some puddles; the area where the puddles occurred corresponds to the snow-covered foreground area of the follo |
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