Teloschistes Lichen

Lichens are remarkable organisms; they consist of an alga and a fungus living together in a symbiotic association (2). A general rule is that the fungal component of a lichen is unable to live independently, but the alga may live without the fungal partner as a distinct species (2). Many lichens are known to be very sensitive to environmental pollution, and they have been used as 'indicators' of pollution (3). This genus is thought by some experts to be very ancient, and some species may have remained unchanged for millions of years (6). The golden hair lichen reproduces asexually, either by the body of the lichen (the thallus) breaking into pieces, or by means of 'soredia', microscopic structures that look like powder to the naked eye, and contain fungal threads and a few algal cells (3).

Although the golden hair lichen is not a UK Biodiversity Action Plan Priority Species, English Nature's Species Recovery Programme has carried out surveys of the species (2). Furthermore, the Countryside Council for Wales has carried out survey and monitoring work on this lichen (2), including an assessment of the health of populations after the Sea Empress oil spill (5). This lichen also receives special protection under Schedule 8 of the Wildlife and Countryside Act, 1981.

The golden-hair lichen is a striking 'fruticose' or 'shrubby' tufted lichen, which is a bright orange colour (2) with highly branched, flattened lobes (7). The name of the genus Teloschistes means 'split ends' (7).

The main habitat of this species in the UK is coastal cliff-tops; it either grows on rock, amongst vegetation, or on stony ground (2). It occasionally occurs inland where it inhabits trunks of trees that are rich in nutrients, typically in parkland, hedgerows and orchards (2).

At present this lichen is restricted to the Welsh coast and south-west England, but the range once extended into central England and along the coast to Kent. A population also occurred in the Firth of Clyde (2). In Europe, the distribution is Mediterranean-Atlantic, the northern extreme of which is in Anglesey. Elsewhere this lichen becomes widespread in tropical and the warmer temperate areas of the world (2) (8).

Classified as Vulnerable in Great Britain (2), and protected under Schedule 8 of the Wildlife and Countryside Act, 1981 (4).

This species is known to be extremely sensitive to sulphur dioxide air pollution (5). Other possible threats include extended dry periods and trampling (5), eutrophication, in particular excess air-bourne ammonia resulting from applications of slurry (9), as well as loss of suitable habitat caused by excessive growth of ivy on hedgerow trees (9).

Teloschistes flavicans, also known as the golden hair-lichen is a lichenized species of fungus in the genus Teloschistes, family Teloschistaceae. Recognized by its safron coloured pigmentation, this species grows on rocks and branches of trees. It was named by Norwegian botanist, Johannes Musaeus Norman.