IADO   05364
INSTITUTO ARGENTINO DE OCEANOGRAFIA
Unidad Ejecutora - UE
artículos
Título:
Shallow-lakes from the Central Plains of Argentina: An overview and worldwide comparative analysis of their basic limnological features.
Autor/es:
DIOSALVI, N.; BOHN, V.Y.; PICCOLO, M.C.; PERILLO, G.M.E.; BAIGUN, C.; ZAGARESE, H.E.
Revista:
HYDROBIOLOGIA
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2014
ISSN:
0018-8158
Resumen:
The Central Plains of Argentina is a
heterogeneous environment, but the lakes there share
some fundamental features: they are all shallow and
polymictic as being well exposed to wind. First, we
provide a synthesis of the climate, geology, and
hydrological network. We also discussed shallow
lakes origin and their limnological and biological
salient features. Second, we focus on Pampean
shallow lakes from a global perspective, comparing
the limnological variables: total phosphorus concen-
tration (TP), total nitrogen concentration (TN),
chlorophyll a (Chl a) concentrations, and Secchi disk
reading (SD) from a compiled database. No significant
differences in the Chl a vs. TP relationship were found
between Pampean and other shallow lakes. Otherwise,
the chlorophyll yield per unit of phosphorus of
Pampean lakes is similar to the world shallow lakes
average. Moreover, the relationship SD vs. Chl
a differed significantly between Pampean and the
remaining world lakes, about 50?60%. When con-
fronted against other lakes worldwide, Pampean
shallow lakes depart from most of them as having
higher TP, TN, and Chl a concentrations and much
lower SD transparency, and therefore they stand as
extremes of the trophic-state continuum. Despite their
highly turbid state, these lakes provide valuable
ecosystem services that are highly appreciated and
mobilize important economic resources.