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Alien Forest
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| Photo Information |
Copyright: Alina Vicu (mamabear)
![Silver Star Critiquer/Silver Note Writer [C: 25 W: 0 N: 41]](http://i1.treknature.com/misc/s-n-s.gif) (193) |
| Genre: Fungi |
| Medium: Color |
| Date Taken: 2009-10-04 |
| Categories: Lichens |
| Camera: Canon PowerShot A460 |
| Exposure: f/2.8, 1/60 seconds |
| Photo Version: Original Version |
| Date Submitted: 2009-11-02 3:31 |
| Viewed: 124 |
| Points: 8 |
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| [Note Guidelines] Photographer's Note |
I found this little "aliens" on a log. I dont know what species is it. If you have some information about that don't hesitate to tell me. Thank You!
Lichens are composite organisms consisting of a symbiotic association of a fungus (the mycobiont) with a photosynthetic partner (the photobiont or phycobiont), usually either a green alga (commonly Trebouxia) or cyanobacterium (commonly Nostoc).The morphology, physiology and biochemistry of lichens are very different from those of the isolated fungus and alga in culture. Lichens occur in some of the most extreme environments on Earth—arctic tundra, hot deserts, rocky coasts and toxic slag heaps. However, they are also abundant as epiphytes on leaves and branches in rain forests and temperate woodland, on bare rock, including walls and gravestones and on exposed soil surfaces (e.g. Collema) in otherwise mesic habitats. Lichens are widespread and may be long-lived;however, many species are also vulnerable to environmental disturbance, and may be useful to scientists in assessing the effects of air pollution ozone depletion, and metal contamination. Lichens have also been used in making dyes and perfumes, as well as in traditional medicines.
The body (thallus) of most lichens is quite different from those of either the fungus or alga growing separately, and may strikingly resemble simple plants in form and growth. The fungus surrounds the algal cells, often enclosing them within complex fungal tissues unique to lichen associations. In many species the fungus penetrates the algal cell wall, forming penetration pegs or haustoria similar to those produced by pathogenic fungi.
Lichen associations may be considered as examples of mutualism, commensalism or even parasitism, depending on the species. Cyanobacteria in laboratory settings can grow faster when they are alone rather than when they are part of a lichen. The same, however, might be said of isolated skin cells growing in laboratory culture, which grow more quickly than similar cells that are integrated into a functional tissue. However, from the work of Coxson (see above) mutualism would appear to best summarise our current knowledge. |
maurydv, Mikolaj, siggi has marked this note useful
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Hello Alina,
a very interesting picture of these Lichens, good sharpness and marvellous natural colours, excellent low POV and composition
TFS
Best regards
Maurizio
Hello Alina! Very interesting shot. Original focus. Nice natural light and colours. Good luck!
- siggi
![Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1373 W: 56 N: 4723]](http://i1.treknature.com/misc/g-g-g.gif)
(16252) - [2009-11-02 9:36]
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Hello Alina.
Very nice and very artistic image. Excellent POV and cropping. Exposure and focus are very good.Best regards Siggi
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- roges
![Gold Star Critiquer/Gold Note Writer [C: 598 W: 0 N: 523]](http://i1.treknature.com/misc/g-n-g.gif)
(3096) - [2009-11-08 11:36]
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Seara buna Alina,
era sa pierd aceasta compozitie frumoasa si interesanta a ta. Dar ... nu s-a intimülat asa ceva. Excelenta ideea ta de realizare si redare a acestei poze.
O seara frumoasa,
Adrian
![Gold Star Critiquer/Silver Note Writer [C: 942 W: 0 N: 40]](http://i1.treknature.com/misc/g-n-s.gif){kind=small}