Linking ornamental stone discolouration to its biocolonisation state

Dias, Luís; Rosado, Tânia; Candeias, António; Mirão, José; Caldeira, Ana Teresa

doi:10.1016/j.buildenv.2020.106934

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…They can form a thick layer, a patina, and a crust that modify the properties of the stone surface, significantly contributing to the biodeterioration of the stone substrate and inducing its subsequent colonization by heterotrophic bacteria and fungi [ 2 ]. Biodeterioration is a slow process caused by the colonizing microorganisms forming a biofilm on the stone surface, which appears in different colors and eventually results in damage [ 6 , 7 , 8 , 9 ]. Specific groups (e.g., sulfate-reducing bacteria, nitrifying bacteria, sulfur-oxidizing bacteria) of colonizing microorganisms have been revealed to contribute to the biochemical reactions on the stone, allowing a better understanding of the processes involved, as well as prevention, control, and management [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Diversity and Composition of Culturable Microorganisms and Their Biodeterioration Potentials in the Sandstone of Beishiku Temple, China

Zhang

et al. 2023

Microorganisms

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Microbial colonization on stone monuments leads to subsequent biodeterioration; determining the microbe diversity, compositions, and metabolic capacities is essential for understanding biodeterioration mechanisms and undertaking heritage management. Here, samples of epilithic biofilm and naturally weathered and exfoliated sandstone particles from different locations at the Beishiku Temple were collected to investigate bacterial and fungal community diversity and structure using a culture-based method. The biodeterioration potential of isolated fungal strains was analyzed in terms of pigmentation, calcite dissolution, organic acids, biomineralization ability, and biocide susceptibility. The results showed that the diversities and communities of bacteria and fungi differed for the different sample types from different locations. The population of culturable microorganisms in biofilm samples was more abundant than that present in the samples exposed to natural weathering. The environmental temperature, relative humidity, and pH were closely related to the variation in and distribution of microbial communities. Fungal biodeterioration tests showed that isolated strains four and five were pigment producers and capable of dissolving carbonates, respectively. Their biomineralization through the precipitation of calcium oxalate and calcite carbonate could be potentially applied as a biotechnology for stone heritage consolidation and the mitigation of weathering for monuments. This study adds to our understanding of culturable microbial communities and the bioprotection potential of fungal biomineralization.

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Section: Introductionmentioning

confidence: 99%

Diversity and Composition of Culturable Microorganisms and Their Biodeterioration Potentials in the Sandstone of Beishiku Temple, China

Zhang

et al. 2023

Microorganisms

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“…The mechanical fracturing and disintegration of natural stone substrates by lithobionts and corrosion through the metabolic processes of microorganisms represent the greatest biodeterioration threats to the conservation of stone-based cultural heritage, however, undesired biological colonisation of stone materials can also lead to unwanted aesthetic changes such as unsightly discoloration that covers art details (Warscheid and Braams, 2000;Charola et al, 2011;Dias et al, 2020;Favero-Longo and Viles, 2020). The open-air conditions of exposure of buildings and monuments induce a large influence of climatic factors on the bioweathering by changing of sunlight radiation, temperatures and rainfall which vary with respect to their geographical location and ongoing climate change.…”

Section: Introductionmentioning

confidence: 99%