FERNANDEZ Eleonora Marisel
Carbohydrate production by microbial mats communities in tidal flat from Bahía Blanca Estuary (Argentina)
FERNÁNDEZ ELEONORA MARISEL; SPETTER CARLA VANESA; MARTÍNEZ ANA MARÍA; CUADRADO DIANA; AVENA MARCELO; MARCOVECCHIO JORGE EDUARDO
Environmental Earth Sciences
Lugar: Verlag Berlin Heidelberg; Año: 2016 vol. 75 p. 1 - 1
The seasonal and spatial distribution of colloidal and capsular extracellular carbohydrates was assessed in three sites in the supratidal flat from Rosales Port (middle zone of Bahı´a Blanca Estuary, Argentina) wheremicrobial mats were developed. Extracellular carbohydrates, Chlorophylla, phaeopigments, organic matter and moisture content were determined in surface (0?5 mm depth) and subsurface (5?10 mm depth) sediment layers.No differences in pH, Eh and temperature were observedamong sites but seasonal differences were found in Eh andtemperature. Organic matter content was statistically different among sites being higher in ST3, which has registered fine sediments. In turn, ST3 differs significantly fromST1 and ST2 in the Chlorophyllaconcentrations in thesubsurface layer and in colloidal and capsular carbohydrates content. In the three study sites, the extracellularcarbohydrates concentration was higher in surface sediment layer than in subsurface layer. In addition, seasonaldifferences were found for all sites between surface andsubsurface sediment layers. Maximum extracellular carbohydrates concentration was registered when theChlorophylla concentration was high. The relationshipamong the physicochemical parameters evaluated, grainsize, Chlorophyll aand extracellular carbohydrates concentration allows defining two different areas in the Rosales Port despite the proximity.