Usnea florida. The fruticose lichen Usnea florida. A lichen is a symbiotic organism comprising a fungus and an alga. The alga produces nutrients for t
RMID:Image ID:2AD0P1W
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Contributor:
Science Photo Library / Alamy Stock PhotoImage ID:
2AD0P1WFile size:
54.4 MB (1.6 MB Compressed download)Releases:
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5144 x 3696 px | 43.6 x 31.3 cm | 17.1 x 12.3 inches | 300dpiDate taken:
12 March 2015Photographer:
CORDELIA MOLLOY/SCIENCE PHOTO LIBRARYMore information:
Usnea florida. The fruticose lichen Usnea florida. 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. The distinctive disc-like structures are fruiting bodies. This lichen is a good indicator of air quality, as it is intolerant of high sulphur dioxide concentrations. It is now rare in the UK due to increasing levels of atmospheric pollution. Photographed in North Wales, UK.