Primary bioreceptivity of granitic rocks to phototrophic biofilms. Development of a bioreceptivity index
A comprehensive evaluation of the primary bioreceptivity to phototrophic biofilms of several varieties of granite was carried out. The bioreceptivity of the granites was more strongly affected by the physical characteristics of the stones than by their chemical composition. Growth of phototrophic bi...
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| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universidad de Santiago de Compostela (USC) |
| Repositorio: | Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela |
| Idioma: | inglés |
| OAI Identifier: | oai:minerva.usc.gal:10347/15086 |
| Acceso en línea: | http://hdl.handle.net/10347/15086 |
| Access Level: | acceso abierto |
| Palabra clave: | Materias::Investigación::25 Ciencias de la tierra y del espacio::2506 Geología::250604 Geología ambiental Materias::Investigación::24 Ciencias de la vida::2414 Microbiología::241408 Procesos microbianos |
| Sumario: | A comprehensive evaluation of the primary bioreceptivity to phototrophic biofilms of several varieties of granite was carried out. The bioreceptivity of the granites was more strongly affected by the physical characteristics of the stones than by their chemical composition. Growth of phototrophic biofilms was strongly enhanced by high open porosity, capillary water content and surface roughness. The findings of the study enabled us to develop a robust and well-founded bioreceptivity index (BI) for granitic rocks. The proposed BI has two components: BIgrowth, which quantifies the extent of the biological growth, and BIcolour, which quantifies the colour change undergone by the stone due to the colonisation and which can be considered the bioreceptivity perceptible by the human eye. The index was fitted to a qualitative scale of 0-10 and can therefore be used as a decision-making tool for selection of appropriate lithotypes for building and/or ornamental purposes. |
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