[Stolen from Wild Green Memes for Ecological Fiends x]
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I thought you might like these moss-filled pawprints in concrete which I saw earlier. :-)
ID: a row of medium sized pawprints, most likely a dog's, dried into the concrete of a pavement kerb. Time and rain has filled the pawprints in with green moss or lichen. The pavement is glowing in the sunlight and you can see the sitting shadow of a dog beside me.
ID: A closeup on one of the moss/lichen pawprints, almost perfectly filled in.
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Blue Oak Branch with Lichens - Lucy Martin
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LICHEN
Lichen are compound organisms. They’re communities of various species, needing each other to live as one.
The main body of the lichen is fungal, but rather than consuming some food source, the fungi partner with a photosynthesizing biont, either algae or cyanobacteria depending on the lichen species.
Recent research shows that lichen are even weirder than people thought, having at least three symbionts or more, including a second fungi. Yeast.
They can be strangely mesmeric with their little and often colorful complexities.
Right at home living on rocks or wood, they’re often right amongst heaps of moss or liverwort.
Mixed up like that, it might be easy to confuse them with plants.
But their colors and shapes give them away. Structure can vary greatly. Shrubby, leafy, crusty or powdery.
Lichen can be found all over the world, including Antarctica, as they resist extremes in conditions.
But they are awfully vulnerable to air pollution, making them obvious indicators of air quality.
Places with greater diversity of any life really but particularly lichen are probably healthier and less polluted.
I usually photograph fungi near my home in Cleveland, but I traveled to Appalachian Pennsylvania to find these beauties all on the same walk.
Not used to this kind of access to my lichen friends, it felt to me like some kind of wonderland!
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Interesting lichen patterns on granite. Western Pinnacles Lakes Basin, John Muir Wilderness, Sierra Nevada Mountains, California, USA. Photo by Van Miller
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Peak District: Frozen 'fish eye' forms on rock
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