INVESTIGADORES
COCHERO Joaquin
artículos
Título:
Biofilm early stage development in two nutrient-rich streams with different urban impacts
Autor/es:
COCHERO, JOAQUÍN; NICOLOSI GELIS MARÍA M.; SATHICQ, MARÍA BELÉN; GÓMEZ, NORA
Revista:
RIVER RESEARCH AND APPLICATIONS
Editorial:
JOHN WILEY & SONS LTD
Referencias:
Año: 2018
ISSN:
1535-1459
Resumen:
The aim of this study was to describe the colonization of the biofilm during its early stages under different water qualities, specifically in urban streams influenced by agriculture and urbanization. We hypothesized that the initial biofilm development, measured as biomass growth and as changes in the structure of the assemblage of algae and bacteria, would be faster in a stream with a lower water quality. Sterile glass substrates were placed in two urban streams; samples were collected during their first week of colonization to measure total biomass, bacterial biomass, chlorophyll-a, activity of the electron transfer system (ETS) and the community composition. Results show that biofilm development in both streams began within a few hours and differed under different water qualities; in the stream with a better water quality the colonization dynamics consisted of two increments of bacterial biomass linked with an increase of algal biomass. In the urban stream with a lower water quality, biofilm development was slower and consisted of a simultaneous increase of bacteria and algae, consistent with a lower ETS activity. Therefore, thedynamics of the colonization process rather than the characteristics of the fully developed biofilm could have potential applications in water monitoring of urban streams.