Lichen, Phaeophysica orbicularis

Lichen, Phaeophysica orbicularis

B350/0110 Rights Managed

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Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: Lichen reproducing. Macrophotograph of the lichen Phaeophysica orbicularis, seen in a wet "vivid- green" state. The granular appearance on the upper surface of the fronds is produced by reproductive structures called soredia. These granular clumps break off and can form a new lichen colony. Lichens are symbiotic organisms, consisting of an algal and a fungal partner together. The fungus benefits from the photosynthetic activity of the alga; the alga may be protected from drought and intense light. Lichens may be sensitive to sulphur dioxide, like this species, & are used to monitor air pollution. (See photo B350/111 for this lichen in a dry state). Magnification: x1 at 6x6cm size.

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Keywords: botany, lichen, lichen in wet state, lichens, mutualism, nature, phaeophysica orbicular, phaeophysica orbicularis, plant, reproduction, soredia, symbiosis, symbiotic

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