RT Journal Article
T1 A laboratory approach on the combined effects of granite bioreceptivity and parameters modified by climate change on the development of subaerial biofilms on cultural heritage
A1 Fuentes Alonso, Elsa
A1 Prieto Lamas, Beatriz
K1 Climate change
K1 Granite bioreceptivity
K1 Water availability
K1 Temperature
K1 SABs
AB Conservation of cultural heritage buildings and monuments may be negatively affected by the impact of climate change on substrates and colonizing microorganisms. In this study, four types of commercial granite, in which the bioreceptivity ranged from very low to very high, were inoculated with a multispecies microbial culture and exposed to different temperatures (18 and 24 °C) and levels of water availability (1 day, 3 days and 7 days of water availability/week) to simulate different climatic conditions. The effects on biofilm formation of the interactions between the substrate bioreceptivity and the environmental parameters were investigated. Biofilm growth and photosynthetic efficiency were monitored over 42 days by pulse-amplitude modulated (PAM) fluorometry and spectrophotometric colour measurement. The primary bioreceptivity of the granite was a determining factor in the organisms' capacity to attach to the substrate and interacted through the experiment with the climatic conditions by modifying the development of the microorganisms. Water availability was a limiting factor for the colonizing microorganisms, in terms of both growth and photosynthetic efficiency. At the higher temperature, metabolic reactions were enhanced under water restriction (but not under maximum water availability) and the microbial ecology was altered, leading to a higher proportion of cyanobacteria relative to algae
PB Elsevier
SN 0964-8305
YR 2021
FD 2021
LK http://hdl.handle.net/10347/26633
UL http://hdl.handle.net/10347/26633
LA eng
NO International Biodeterioration & Biodegradation, 164 (2021), 105295
NO This study was partly financed through project CGL2016-79778-R (AEI/FEDER, UE) and Xunta de Galicia (ED431 2018/32). E. Fuentes was financially supported by a PhD Fellowship-Contract MICINN-FPI (BES-2017-079927)
DS Minerva
RD 28 abr 2026