Lichen. Lichens are symbiotic organisms formed of a fungus and an alga that mutually benefit one another. The alga is contained within the hyphae (filaments) of the fungus. They are therefore protected from harsh conditions,and in particular from dessication. The alga supplies the fungus with the nutrients that it makes with photosynthesis. Lichens are usually found growing on stones and the bark of trees. Photographed in Paradise Valley,Nevada,USA | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Wiersma, Dirk |
Bildgröße: | 4848 px × 3624 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |