IIMYC   23581
INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Unidad Ejecutora - UE
artículos
Título:
Variations in macrobenthic community structure in relation to changing environmental conditions in sandy beaches of Argentina
Autor/es:
CARCEDO C.; FIORI S.; PICCOLO C.; LOPEZ ABBATE C.; BREMEC C.
Revista:
ESTUARINE, COASTAL AND SHELF SCIENCE Buscar por Nombre
Editorial:
Elsevier
Referencias:
Lugar: Kiel; Año: 2015
Resumen:
This study describes for the first time the intertidal macrobenthic community of exposed sandy beacheslocated near the Bahía Blanca Estuary (38S) and reports the physical characterization of this coastalfringe. The main objective of the study was to link environmental variables to biotic information,analyzing the results in the context of the Swash Exclusion Hypothesis (SEH) and possible estuarine influence.Four beaches were sampled seasonally at different distances from the mouth of the Bahía BlancaEstuary. To characterize the morphodynamic state of the beaches, the Dean parameter (U) was calculated.Multivariate analyses were used to assess benthic community structures and their relationshipswith physical variables. The two beaches located closest to the Bahía Blanca Estuary were classified asintermediate and those located further from the estuary as dissipative. Richness, diversity and biomass ofintertidal macrobenthic communities varied with the SEH, increasing towards the dissipative beaches.However, total density was higher on intermediate beaches, possibly because of nutrient-rich silt-claysediment input from the estuary, enabling them to maintain a higher density of organisms than dissipativebeaches. The estuary acts as a moderator of habitat hardness, which together with the morphodynamicstate of the beaches is an important factor in the structuring of the macrobenthic communityalong this coastal fringe.