INVESTIGADORES
PEREZ gonzalo luis
artículos
Título:
Summer population development and diurnal vertical distribution of dinoflagellates in an ultraoligotrophic Andean lake (Patagonia, Argentina).
Autor/es:
QUEIMALIÑOS, C. P., PÉREZ, G. L. & B. E. MODENUTTI.
Revista:
ALGOLOGICAL STUDIES
Referencias:
Año: 2002 vol. 107 p. 117 - 129
ISSN:
0342-1120
Resumen:
Diurnal vertical distribution of dinoflagellates in relation to environmental
parameters was analysed in Lake Moreno Oeste (North Patagonia, Argentina) during a
spring-summer period, when the lake was thermally stratified. Seven unarmored and armored
dinoflagellates species were registered, including four species of Gymnodinium,Gymnodinium,
which are reported for Argentina and South America for the first time. Four species belong
to the net phytoplankton fraction, two others are nanoplanktic, while the last one is considered
as a planktic protist since it is colourless. The two dominant species of the larger
fraction, G. puradoxum and G. uberrimum, were recorded all along the water column, but
they clearly preferred deep levels between 28 and 40 m depth which receive 1 % of surface
PAR irradiance. In this way, these species are included in the deep chlorophyll maxima
observed in this lake. On the contrary, the smallest species showed different vertical distribution
patterns. Peridinium sp. developed its maximum abundances in the epilimnetic
levels, while G. vuriuns was randomly distributed along the water column.G. puradoxum and G. uberrimum, were recorded all along the water column, but
they clearly preferred deep levels between 28 and 40 m depth which receive 1 % of surface
PAR irradiance. In this way, these species are included in the deep chlorophyll maxima
observed in this lake. On the contrary, the smallest species showed different vertical distribution
patterns. Peridinium sp. developed its maximum abundances in the epilimnetic
levels, while G. vuriuns was randomly distributed along the water column.40 m depth which receive 1 % of surface
PAR irradiance. In this way, these species are included in the deep chlorophyll maxima
observed in this lake. On the contrary, the smallest species showed different vertical distribution
patterns. Peridinium sp. developed its maximum abundances in the epilimnetic
levels, while G. vuriuns was randomly distributed along the water column.On the contrary, the smallest species showed different vertical distribution
patterns. Peridinium sp. developed its maximum abundances in the epilimnetic
levels, while G. vuriuns was randomly distributed along the water column.Peridinium sp. developed its maximum abundances in the epilimnetic
levels, while G. vuriuns was randomly distributed along the water column.G. vuriuns was randomly distributed along the water column.