Usnea florida lichen. Close-up of Usnea florida lichen growing on a tree. A lichen is a symbiotic organism comprising a fungus and an alga. The alga produces nutrients for the fungus by photosynthesis. Usnea florida is found on twigs and branches in the canopy of broad-leaved trees, especially oak. This lichen is a good indicator of air quality, as it is intolerant of high sulphur dioxide concentrations. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Thomas, Adrian |
Bildgröße: | 2657 px × 3970 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |