And one more tree trunk.
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| Douglas-fir. Sap and lichens. |
Trees leak sap when they're wounded or punctured, as when a sapsucker goes for a meal or a beetle digs an entry hole. Here, the dripped sap mingles with Cladonia spp. lichens, tiny leafy lichens that look like dust lichens from a small distance.
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Y uno más ...
Foto: un abeto de Dougla con savia y líquenes. Los árboles exuden savia cuando están heridos o agujereados, como por ejemplo cuando un chupasavias busca su comida, o cuando un escarabajo hace un portal de entrada. Aquí, la savia escurrida se mezcla con líquenes Cladonia, los cuales son líquenes foliosos tan pequeños que a poca distancia parecen ser líquenes de polvo.
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