Recovery Capacity of Subaerial Biofilms Grown on Granite Buildings Subjected to Simulated Drought in a Climate Change Context
- 25 January 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Microbial Ecology
- Vol. 82 (3), 761-769
- https://doi.org/10.1007/s00248-021-01692-0
Abstract
Variations in environmental conditions in the context of climate change are expected to affect biofilm-associated organisms on granite heritage buildings. The number and duration of drought periods should be considered, as these factors will affect the availability of water for the microorganisms. In this study, mature biofilms were exposed to various drying-rewetting cycles, and the effects of water stress on the SAB and their resilience were evaluated in terms of the variation in microbial composition, extracellular polymeric substance production, and photosynthetic efficiency. The structure of the biofilm changed after exposure to drought, becoming more heterogeneous and with an increase in the carbohydrate to protein ratio, especially after the second day of total drought. Y-MAX and Y-EF parameters proved to be the most informative, showing that the photosynthetic efficiency and recovery capacity were inversely related to the duration of the drought period. Furthermore, cyanobacteria resisted drought better than algae, giving rise to a decrease in the algae to cyanobacteria ratio.Keywords
Funding Information
- Ministerio de Ciencia, Innovación y Universidades (BES-2017-079927)
- Agencia Estatal de Investigación (CGL2016-79778-R)
- European Regional Development Fund (CGL2016-79778-R)
This publication has 35 references indexed in Scilit:
- Dynamic cyanobacterial response to hydration and dehydration in a desert biological soil crustThe ISME Journal, 2013
- Mapping the impact of climate change on biomass accumulation on stoneJournal of Cultural Heritage, 2012
- Influence of material properties and photocatalysis on phototrophic growth in multi-year roof weatheringInternational Biodeterioration & Biodegradation, 2011
- The influence of precipitation pulses on soil respiration – Assessing the “Birch effect” by stable carbon isotopesSoil Biology and Biochemistry, 2010
- The biofilm matrixNature Reviews Microbiology, 2010
- Alginate Production by Pseudomonas putida Creates a Hydrated Microenvironment and Contributes to Biofilm Architecture and Stress Tolerance under Water-Limiting ConditionsJournal of Bacteriology, 2007
- MICROBIAL STRESS-RESPONSE PHYSIOLOGY AND ITS IMPLICATIONS FOR ECOSYSTEM FUNCTIONEcology, 2007
- The polyphasic chlorophyll a fluorescence rise measured under high intensity of exciting lightFunctional Plant Biology, 2006
- Biofilms fouling ancient limestone Mayan monuments in Uxmal, Mexico: a cultivation-independent analysisBiofilms, 2004
- Microtopographic Cues for Settlement of Zoospores of the Green Fouling Alga EnteromorphaBiofouling, 2002