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Free
Teacher & Student Image Resources
of Lichen & Mosses
Did
you know....
that
Lichens
are made up of 2 or even 3 organisms which have a symbiotic
relationship with each other. Most of the lichen is made up
of fungal filaments, but living among those filaments are algal
cells. Lichens are made up of fungus + a photosynthesizing
alga. Sometimes the combination is a fungus + a
photosynthesizing "bacterium" called "cyanobacterium". While some
fungus and some alga are found living without their partner, many
other lichens cannot survive on their own. Lichens grow all around the world, living on almost any inanimate
object. They are one of the hardiest organisms on Earth.
Confused?
Here's a simple story used by many educators to explain symbiotic
relationships within lichens. Students will learn that
lichens are "dual organisms" made up of fungus and
algae.
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The
Story of Freddie and Alice
Alice
Algae was a terrific cook who could whip up fabulous food from
thin air. Sadly, however, she had no home. One day
Alice Algae met Freddie Fungus who could build a home out of any
material, but alas, did not know how to cook and feed himself.
Well,
as the story goes, they immediately took a "lichen" to
each other. Alice Algae began to feed Freddie Fungus and
Freddie maintained their home. Although their marriage was
sometimes "on the rocks", they lived symbiotically ever
after.
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In
short, lichens marry fungi and algae in a partnership that
benefits both sides -- Fungi provide water and minerals, while
algae use photosynthesis to make food.
Learn
more on the FreeTiiuPix All About
Lichen page here.
***
Warning ***
I
wrestled with the option of whether or not to try to identify and place
names to my lichen images. The study of lichens is done by
scientists known as "Lichenologists" who have many years of
education and specialize in identification.
Although
there aren't many lichen that are poisonous, there are some that
are high in vulpinic or usnic acid and they are toxic.
While
I have tried to link images with lichen names, I am not a
specialist in this field. I have used books and images to
try to look up, categorize and name the various species. My
identification should in no way be relied upon as accurate.
YOU alone are responsible for properly identifying any lichen that
you may be interested in. I have attached names to images
which I merely THINK resemble the species.
I
am grateful for corrections to taxonomic determinations, please
contact me at FreeTiiuPix
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Lovely Lichens &
Magnificent Mosses
Lichens - Two types of organisms living together - a fungus
and an alga. The fungus makes the body that protects the
alga, and the alga provides the food for the fungus.
Thoreau
once wrote: "I find myself inspecting
little granules as it were on the bark of trees - little shields
or apothecia springing from a thallus - such is the mood of my
mind - and I call it studying.
Classification
-
Lichens were problematic for biological classification but
are now classified as fungi under the genus and species of the
host fungus.
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