
Extensive surface fouling by the lichens with obvious domination Xanthoparmelia stenophylla.

Local biofouling by macro- and microlichens (main covering - Aspicilia sp.).

Algal-bacterial mat with participation of black-colored micromycetes and microlichens.

Surface crust formed by lichens with domination of Aspicilia sp.

Biofouling by macro- and microlichens with domination of Physcia sp.

Thin light-green laminae of lichen - Phaeophyscia sp. surround by Lecidella sp.

Stretched compact thallus of lichen - Protoparmeliopsis muralis surround by Verrucaria sp.
Granite head.
Sainkt-Petersburg, Petrodvorets, Sergievka.
Description of "Granite head" biofouling map