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Effects of changes in UV-B radiation levels on biofilm-forming organisms commonly found in cultural heritage surfaces by Elsa Fuentes; Diana Pérez-Velón; Beatriz Prieto is a Environmental Science article available to read on EtoBox.

What is Effects of changes in UV-B radiation levels on biofilm-forming organisms commonly found in cultural heritage surfaces about?

Accurate measuring and monitoring methods available since the 1980s have shown that the amount of Ultraviolet B (UV-B) radiation reaching the Earth's surface has increased as a result of degradation of the ozone layer. Since the adoption of the Montreal Protocol in 1987, ozone levels have been recovering successfully. However, in the context of the current climate change, other factors such as changes in cloud patterns and an increased incidence of natural disasters (e.g. fires) may be disrupting this recovery. The present study aimed to investigate the effects of different UV-B radiation levels on biofilms colonising heritage monuments. For this purpose, the effects of current UV-B levels on a biofilm composed of Synechocystis sp. (a cyanobacterium), Bracteacoccus minor (a green alga) and Fusarium sp. (a fungus) were compared at three points along a South-North transect: Portugal, Galicia (NW Spain) and Ireland (from highest to lowest UV-B radiation, respectively). Increased levels of UV-B radiation caused changes in the growth, physiological state and composition of subaerial biofilms, with cyanobacteria being more resistant than green algae to high levels of UV-B. A reduction of

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Author

Elsa Fuentes; Diana Pérez-Velón; Beatriz Prieto

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Environmental Science (Physical Sciences)