2026-04-14T02:12:04Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/115492024-06-18T14:32:00Zcom_2072_452955com_2072_2054col_2072_452959

Shifts in microbial community structure and function in light- and dark-grown biofilms driven by warming Romaní i Cornet, Anna M. Borrego i Moré, Carles Díaz Villanueva, Verónica Freixa Casals, Anna Gich Batlle, Frederic Ylla i Monfort, Irene Biofilms Ecologia microbiana Microbial ecology Biofilms are dynamic players in biogeochemical cycling in running waters and are subjected to environmental stressors like those provoked by climate change. We investigated whether a 2 degrees C increase in flowing water would affect prokaryotic community composition and heterotrophic metabolic activities of biofilms grown under light or dark conditions. Neither light nor temperature treatments were relevant for selecting a specific bacterial community at initial phases (7-day-old biofilms), but both variables affected the composition and function of mature biofilms (28-day-old). In dark-grown biofilms, changes in the prokaryotic community composition due to warming were mainly related to rotifer grazing, but no significant changes were observed in functional fingerprints. In light-grown biofilms, warming also affected protozoan densities, but its effect on prokaryotic density and composition was less evident. In contrast, heterotrophic metabolic activities in light-grown biofilms under warming showed a decrease in the functional diversity towards a specialized use of several carbohydrates. Results suggest that prokaryotes are functionally redundant in dark biofilms but functionally plastic in light biofilms. The more complex and self-serving light-grown biofilm determines a more buffered response to temperature than dark-grown biofilms. Despite the moderate increase in temperature of only 2 degrees C, warming conditions drive significant changes in freshwater biofilms, which responded by finely tuning a complex network of interactions among microbial populations within the biofilm matri This study was funded by the Spanish Ministry of Economy and Competitiveness, project FLUMED-HOTSPOTS (CGL2011-30151-C02-01). V. Diaz Villanueva participated in this project supported by FONCYT (Argentina) (PICT-2007-01747) and CONICET (PIP 114-201101-00304) 2024-06-18T14:32:00Z 2024-06-18T14:32:00Z 2024-06-18T14:32:00Z info:eu-repo/date/embargoEnd/2026-01-01 info:eu-repo/date/embargoEnd/2026-01-01 2014 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/10256/11549 info:eu-repo/semantics/altIdentifier/doi/10.1111/1462-2920.12428 info:eu-repo/semantics/altIdentifier/issn/1462-2912 info:eu-repo/semantics/altIdentifier/eissn/1462-2920 info:eu-repo/grantAgreement/MICINN//CGL2011-30151-C02-01/ES/HOT-SPOTS BIOGEOQUIMICOS Y MICROBIANOS EN RIOS MEDITERRANEOS. ESTRUCTURA Y FUNCION DEL BIOFILM MICROBIANO Y SU IMPLICACION EN LA GESTION DE LA CALIDAD DE LAS AGUAS FLUVIALES/ Tots els drets reservats info:eu-repo/semantics/embargoedAccess Wiley © Environmental Microbiology, 2014, vol. 16, núm. 8, p. 2550-2567 Articles publicats (D-CCAA)