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[EarthNSky <erthnsky AT bellsouth.net>]

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Sage Austin | Eureka! Design wrote:
> "Lichens growing on trees (and throughout the ecosystem), each posessing 
> their own unique chemistries, also leach substantial quantities of 
> secondary metabolites, which each combine in unique ways with those of 
> their host plants. Lichens are a symbiosis of two organisms, a fungal 
> mycelia and an alga, that come together to form one plant. In a sense 
> they are a kind of mycelia that can live outside the soil; the alga 
> protects the internal mycelial core (from such things as drying out) 
> much as the soil does. The exterior alga and the interior mycelial core 
> possess their own unique biochemistries while, in combination, they 
> produce synergistic compounds unique to their combination as a lichen. 
> In the case of Usnea lichens the exterior covering is highly 
> antibacterial while the inner mycelial core, composed of complex 
> polysaccharides, is strongly immune potentiating. Lichens release these 
> compounds into their tree hosts to support their hosts' health and also 
> leach the into the system during rainfall. The tree lichens growing in a 
> hectare (2.5 acres) of oak woods can weigh 1,500 pounds and their 
> chemistries significantly alter throughfall water chemsitry"
>
> Johannes Knops, et al., "The influence of piphytic lichens on the 
> nutrient cycling of an oak wood," in Ecological Monographs (May 1996) 
> www.nothernlights.com, excerpted from Stephen Harrod Buhner's "Lost 
> Language of Plants".
>
> --Sage
>
> Clansgian AT wmconnect.com wrote:
> >   
> > > > What kind of lichen?  Are they cutting out light/air movement or????
> > > >       
> > Enough lichens on the bark causes the bark to deteriorate and introduces 
> > bacterial diseases and harmful fungus.  I lost a whole grove of cherry trees due 
> > to allowing the lichens to grow too thickly on them.  Pity too, really good 
> > Montmorency trees that produced heavily.  
> >
> > Now I make the bark a hostile environent for lichens and fungus by treating 
> > the bark with a weak copper solution.
> >
> > James
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> >   
>
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--
"Nothing in this world can take the place of persistence. Talent will 
not; nothing is more common than unsuccessful people with talent. Genius 
will not; unrewarded genius is almost a proverb. Education will not; the 
world is full of educated derelicts. Persistence and determination alone 
are omnipotent. The slogan 'press on' has solved and always will solve 
the problems of the human race"

~ Calvin Coolidge