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Lichen


Lichen
Photo Information
Copyright: Tanja Almazan (sily) Gold Star Critiquer/Gold Note Writer [C: 238 W: 6 N: 391] (1893)
Genre: Fungi
Medium: Color
Date Taken: 2006-09-06
Categories: Lichens
Photo Version: Original Version
Date Submitted: 2007-02-05 7:22
Viewed: 830
Points: 12
[Note Guidelines] Photographer's Note
Lichens are unusual creatures. A lichen is not a single organism the way most other living things are, but rather it is a combination of two organisms which live together intimately. Most of the lichen is composed of fungal filaments, but living among the filaments are algal cells, usually from a green alga or a cyanobacterium.

In many cases the fungus and the alga which together make the lichen may each be found living in nature without its partner, but many other lichens include a fungus which cannot survive on its own -- it has become dependent on its algal partner for survival. In all cases though, the appearance of the fungus in the lichen is quite different from its morphology as a separately growing individual.

Lichens are informally classified by growth form into:
* crustose (paint-like, flat), e.g., Caloplaca flavescens
* filamentose (hair-like), e.g., Ephebe lanata
* foliose (leafy), e.g., Hypogymnia physodes
* fruticose (branched), e.g., Cladina evensii, C. subtenuis, and Usnea australis
* leprose (powdery), e.g., Lepraria incana
* squamulose (consisting of small scale-like structures, lacking a lower cortex), e.g., Normandina pulchella
* gelatinous lichens, in which the cyanobacteria produce a polysaccharide that absorbs and retains water.
clnaef, JoseMiguel, jeanpaul, blakitan has marked this note useful
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Critiques [Translate]

Bonjour,
Bon éclairage pour ce beau lichen.
Bonne journée.
clnaef

Hello Tanja,

excllent colors bg POV DOF perfect detail svery crisp nicly composed and capture photo excllent Job

TFS Kyle

BONJOUR
BELLES COULEURS ET BONNE LUMINOSITE
AMITIES
EDITH

Hi Tanja,
Fascinating story about the linchens.
Even more useful when seeing your excelent picture to illustrate it.
I like so much the sharp details got, and the intense yellow of them.
The upper POV and the square composition works pretty well, the linchens stand out pretty well of the dark rock's surroundings.
Congratulations, thanks for share and my best reagrds,
JM

Hi Tanja,
Interesting capture of an unsual object.
Beautiful colors.
Very nice shot.

Ben Lakitan

Hi Tanja
Belle et intéressante composition photographique pour ces étonnants spécimens de champignons. Jolies couleurs et bonne netteté.
Merci et au revoir...JP
Les sourires demain

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