INVESTIGADORES
PERILLO Vanesa Liliana
artículos
Título:
Epibenthic microbial mats behavior as phosphorus sinks or sources in relation to biological and physicochemical conditions
Autor/es:
PERILLO VANESA L.; LA COLLA, NOELIA S.; PAN, JERÓNIMO; SERRA, ANALÍA V.; BOTEÉ S.; CUADRADO DIANA G.
Revista:
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Editorial:
ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD
Referencias:
Año: 2022 vol. 314
ISSN:
0301-4797
Resumen:
Microbial mats are complex microecosystems that have shown promise as possible green filters to remediatepolluted seawater. This usage would possibly require changing the natural conditions under which these mi-crobial mats prosper in order to maximize their contact with the water. Thus, it is necessary to evaluate theadaptation of the mats to different environmental conditions, while monitoring their short-term efficiency atnutrient removal. To that aim, epibenthic microbial mats collected from a tidal flat in the Bahía Blanca Estuary,were incubated under different flooding conditions (periodically exposed to the air or continuously flooded),with and without the addition of a high phosphorus concentration (5 mg PO43L1), and with and without thepresence of penicillin. This last condition was added to understand the influence of penicillin-sensitive microbeson cyanobacteria and diatom communities and their importance for P remediation. The presence of high Pconcentrations as well as the continual flooding of the mats resulted in the decrease of the dominant cyano-bacterium, Coleofasciculus (Microcoleus) chthonoplastes, giving rise to the dominance of other genera such asArthrospira sp. Or Oscillatoria sp., depending on the presence or absence of the antibiotic, respectively. Water Premoval was highly efficient (60?87%) when the mats were treated with the high-P water. However, microbialmat behavior changed from P sink to source when mats where incubated in seawater with no P addition, gesting that mats can both function as P sinks and sources, depending on the condition of the water they come incontact with.