Lichens growing on the bark of cut logs which have been left for several years. Lichens comprise an alga and a fungus living in partnership. The alga,confined to a layer of single cells in the main body of the fungus,produces nutrients for the lichen by photosynthesis. Lichens grow on a variety of substrates,from bare rock in Arctic regions to tree trunks in forests | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Burgess, Dr. Jeremy |
Bildgröße: | 5243 px × 3559 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |