INVESTIGADORES
PERILLO Gerardo Miguel E.
artículos
Título:
The role of Sarcocornia perennis on sediment biogeochemistry in a South American wetland
Autor/es:
NEGRIN, V.L.; SPETTER, C.V.; GUINDER, V.A.; PERILLO, G.M.E.; MARCOVECCHIO, J O
Revista:
MARINE BIOLOGY RESEARCH
Editorial:
TAYLOR & FRANCIS AS
Referencias:
Lugar: Londres; Año: 2013 vol. 9 p. 703 - 715
ISSN:
1745-1000
Resumen:
The roles of Sarcocornia perennis and tidal flooding on sediment biogeochemistry were evaluated within a wetland in the
Bahı´a Blanca estuary. pH and Eh were measured in sediments while particulate organic carbon (POC) and dissolved
inorganic nutrient concentrations were determined in porewater, at three sites with different conditions according to
vegetation and flooding. Grain size was also analysed. pH varied in a narrow range (78.2) and was lower in the vegetated
site. Eh values (50250 mV) imply that sediment conditions were moderately reduced, in agreement with the relatively high
percentage of sand; it was influenced by both factors. POC concentration was high (26.2491.62 mg/l), especially at the
vegetated site. The concentrations of ammonium and nitrate were similar (21.3091.83 and 18.7793.06 mmol/l,
respectively) and not affected by flooding; only nitrate was affected by vegetation. Phosphate was rather constant
(13.4391.19 mmol/l) and affected mainly by flooding. Silicate was high (566.45976.06 mmol/l) and not affected by either
factor. These results suggest that the sediment biogeochemistry of this environment is significantly influenced by flooding
and, especially, by S. perennis, as vegetation affected a higher number of parameters.