ILPLA 05424
INSTITUTO DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Unidad Ejecutora - UE
artículos
Título:
Evaluation of zoobenthic assemblages and recovery following
Autor/es:
OCÓN, C. S.; RODRIGUES CAPÍTULO, A.; PAGGI, A. C.
Revista:
ENVIRONMENTAL POLLUTION
Editorial:
Elsevier
Referencias:
Año: 2007
ISSN:
0269-7491
Resumen:
Abstract
The objective of this work was to analyse zoobenthic assemblages in the coastal sector of the
Río de La Plata, Argentina, after a petroleum spill. Sampling stations were located in
representative sites of various landscapes. Structure, composition, physico-chemical
parameters and seasonal changes were recorded in order to assess taxocenosis evolution
during the period ranging from 1999-2003. Recovery signs were estimated by means of
biotic indices and the presence of sensitive species. Tolerant species were dominant in
heavily polluted sites, related to low diversity and water quality values, according to the
biotic indices used. In certain zones, sediment quality remains impoverished, with a
visible oil film on the surface. However, during the last sampling, some points showed
an increase in biotic indices, pointing to a slight improvement in environmental
conditions.
