Diversidad de invertebrados bentónicos del Río de la Plata

CÉSAR, I.; C. OCON; A. C. PAGGI; A. RODRIGUES CAPÍTULO; F. SPACCESI; M. TANGORRA; M. TASSARA

Biologia Acuática

PublicArt (Publicación del ILPLA)

Lugar: La Plata, Argentina; Año: 2000 vol. 19 p. 27 - 63

0326-1638

The Río de la Plata River presents long the south coastal fringe different invertebrate assemblages related with substrate type, size sediments grains and organic matter content into the bed sediments. Other important factors influencing the distribution of benthos community in this river are the salinity and suspended solids of the water and the proximity to the riverside which increases the diversity of the habitats. The purpose of this study is to describe the taxonomic composition and ecological characteristics of the meso and macrobentos associated with the river bed from Delta del Paraná to Magdalena, in Buenos Aires province. The listed taxa are the result of the revised literature and original data obtained from periodical samplings since 1993 till1998. The principal components of the zoobenthos in the studied area were the allochtonous molluscs Corbicula fluminea on sandy and muddy bottoms and Limnoperna fortunei on hard substrates of the riverside. The nematods and olgochaetes dominated sediments with high allochtonous organic matter content imported from urban effluents. Palaemonetes argentinum, Macrobrachium borelli, Claudicuma platensis, Sinelobus stanfordi, Basphaeroma rhombofrontale and Trychodactylus panoplus were the more common crustaceans in non polluted areas.