INVESTIGADORES
IZAGUIRRE Irina
artículos
Título:
Epilithic algae in a glacial stream at Hope Bay, Antarctica
Autor/es:
IZAGUIRRE, I., Y H. PIZARRO
Revista:
POLAR BIOLOGY
Editorial:
SPRINGER
Referencias:
Año: 1998 vol. 19 p. 24 - 31
ISSN:
0722-4060
Resumen:
The epilithic algal community of a glacial
stream of Hope Bay (Antarctica) was studied during the
summer period of 1995. Major hydrological changes,
which aected the main physical and chemical features,
were observed in the stream according to the meltwater
pulses. The enrichment of the stream by seabird inputs
was evident from the high nutrient concentrations and
their increase downstream. The presence of a snowbank
in the middle reach produced a major discontinuity,
in¯uencing the main variables analyzed. The stream
showed a similar algal composition to other water
courses of Hope Bay, with Prasiola crispa, Hydrurus
foetidus, Phaeogloea mucosa and Phormidium fragile as
the dominant species. Chlorophyll a concentrations
taken from natural substrata (stones) ranged from un-
detectable to 48.4 mg m)2, with the maximum concen-
trations associated with algal mats dominated by Pra-
siola crispa.Prasiola crispa, Hydrurus
foetidus, Phaeogloea mucosa and Phormidium fragile as
the dominant species. Chlorophyll a concentrations
taken from natural substrata (stones) ranged from un-
detectable to 48.4 mg m)2, with the maximum concen-
trations associated with algal mats dominated by Pra-
siola crispa., Phaeogloea mucosa and Phormidium fragile as
the dominant species. Chlorophyll a concentrations
taken from natural substrata (stones) ranged from un-
detectable to 48.4 mg m)2, with the maximum concen-
trations associated with algal mats dominated by Pra-
siola crispa.a concentrations
taken from natural substrata (stones) ranged from un-
detectable to 48.4 mg m)2, with the maximum concen-
trations associated with algal mats dominated by Pra-
siola crispa.)2, with the maximum concen-
trations associated with algal mats dominated by Pra-
siola crispa.Pra-
siola crispa..