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Biofilm forming cyanobacteria, algae and fungi on two historic monuments in Belgrade, Serbia

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Author(s): Ljaljević-Grbić Milica | Vukojević Jelena | Subakov-Simić Gordana | Krizmanić Jelena | Stupar Miloš

Journal: Archives of Biological Sciences
ISSN 0354-4664

Volume: 62;
Issue: 3;
Start page: 625;
Date: 2010;
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Keywords: photosynthetic organisms | micromycetes | biodeterioration | cultural heritage

ABSTRACT
Biofilm on the sandstone substrata of the bridge 'Brankov most' and on the granite substrata of the 'Monument of the Unknown Hero' contains a complex consortia of cyanobacteria, algae, and fungi. Coccoid and filamentous cyanobacteria, green algae and diatoms make up the photosynthetic part of the biofilm while hyphal fragments, chlamydospores, fruiting bodies and spores take part as fungal components. These structures make a dense layer by intertwining and overlapping the stone surface. Five cyanobacterial, 11 algal and 23 fungal taxa were found. The interaction of the biofilm's constituents results in the bioweathering of the stone substrata through mechanical penetration, acid corrosion and the production of secondary mycogenic biominerals. .
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