INVESTIGADORES
GOMEZ Nora
artículos
Título:
The Pampean Diatom Index (IDP) for assessment of rivers and streams in Argentina
Autor/es:
GOMEZ, N.; LICURSI, M.
Revista:
AQUATIC ECOLOGY
Editorial:
Kluwer
Referencias:
Lugar: Holanda; Año: 2001 vol. 35 p. 173 - 181
ISSN:
1386-2588
Resumen:
Abstract
The rivers and
streams of the Pampean plain are subjected to the impact of agriculture,
cattle-raising and industrial activities. The largest urban center of Argentina
is located here. The most important stresses on rivers and streams in the
Pampean plain are organic enrichments (discharge of insufficiently treated
sewage), nutrients, heavy metals, pathogenic agents, pesticides, herbicides and
physical changes produced by dredging and canalisation. The epipelic community
is suitable for biomonitoring purposes because it allows for comparing similar
substrates along the rivers and streams. A total of 164 samples of epipelic
diatoms were collected during 1995-1999 from Pampean rivers and streams. The
analysis of these samples resulted in the development of a specific biotic
index: the Pampean Diatom Index (IDP). The results were correlated with the
main chemical water characteristics and with other biotic indices. This study
suggests that the IDP is integrating organic pollution and eutrophication and can
be applied for monitoring the biological quality of rivers and streams in the
Pampean plain.