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Abstract:

Temporal and spatial variations of the epilithic phycoflora were studied in one of the largest streams at Hope Bay (Antarctic Peninsula) during the summer of 1992/93. A complete floristic inventory was made, and the relative frequencies of each algal taxon were estimated. Periphytic cumulative chlorophyll a was measured by means of artificial substrata. The stream was a typical maritime Antarctic lotic ecosystem, with evident signs of enrichment by sea-birds. Variability in discharge strongly affected the water chemistry, with the high water level periods characterized by the lowest conductivities and dissolved reactive phosphorus concentrations. Epilithic algal communities predominantly consisted of algal mats or filamentous and foliose forms of Prasiola crispa. Other dominant species were Leptolyngbya fragilis, Hydrurus foetidus, Chrysococcus cl. rufescens and Phaeogloea mucosa. Whereas P. crispa appeared more frequently near to the origin of the stream in Boeckella Lake, Chrysophyceae were better developed towards the mouth.

Registro:

Documento: Artículo
Título:Epilithic algae from a freshwater stream at Hope Bay, Antarctica
Autor:Pizarro, H.; Izaguirre, I.; Tell, G.
Filiación:Fac. Ciencias Exactas y Naturales, Universidad Buenos Aires, Depto. Ciencias Biológicas, 1428 Buenos Aires, Argentina
Palabras clave:Antarctica; chlorophyll a; epilithic algae; maritime stream; epilithic algae; maritime stream; Antarctica, Antarctica Peninsula, Hope Bay; Chrysococcus rufescens; Hydrurus foetidus; Leptolyngbya fragilis; Phaeogloea mucosa; Prasiola crispa
Año:1996
Volumen:8
Número:2
Página de inicio:161
Página de fin:167
Título revista:Antarctic Science
Título revista abreviado:ANTARCT. SCI.
ISSN:09541020
CODEN:ANTSE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v8_n2_p161_Pizarro

Referencias:

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  • Broady, P.A., The distribution of Prasiola calophylla (Carmich.) Menegh. (Chlorophyta) in Antarctic freshwater and terrestrial habitats (1989) Antarctic Science, 1, pp. 109-118
  • Corte, A., Algas de agua dulce en lagos semicongelados de Bahía Esperanza, Península Antártica (1962) Contribución del Instituto Antártico Argentino, 69, pp. 1-38
  • Digby, P.G.N., Kempton, R.A., (1994) Multivariate Analysis of Ecological Communities, 206p. , London: Chapman & Hall
  • Hawes, I., Filamentous green algae in freshwater streams on Signy Island, Antarctica (1989) Hydrobiologia, 172, pp. 1-18
  • Hawes, I., Brazier, P., Freshwater stream ecosystems of James Ross Island, Antarctica (1991) Antarctic Science, 3, pp. 265-271
  • Hirano, M., Freshwater algae from Yukidori Zawa near Syowa Station, Antarctica (1979) National Institute of Polar Resarch Memoirs, W, 35, pp. 1-34
  • Howard-Williams, C., Vincent, W.F., Microbial communities in southern Victoria Land streams. I. Photosynthesis (1987) Hydrobiologia, 172, pp. 27-38
  • Howard-Williams, C., Vincent, C.L., Broady, P.A., Vincent, W.F., Antarctic stream ecosystems: Variability in environmental properties and algal community structure (1986) Internationale Revue der Gesamten Hydrobiologie, 71, pp. 511-544
  • Izaguirre, I., Mataloni, G., Vinocur, A., Tell, G., Temporal and spatial variations of phytoplankton from Boeckella Lake (Hope Bay, Antarctic Peninsula) (1993) Antarctic Science, 5, pp. 137-141
  • Mackereth, J.F.H., Hiron, J., Talling, J.F., Water analysis: Some revised methods for limnologists (1978) Freshwater Biology Association, Scientific Publication, 36, pp. 1-117
  • Reynolds, C.S., Functional morphology and the adaptive strategies of freshwater phytoplankton (1991) Growth and Reproductive Stragegies of Freshwater Phytoplankton, pp. 388-433. , SANDGREN C.D., ed. Cambridge: Cambridge University Press
  • Determination of photosynthetic pigments in sea water. Report of SCOR-UNESCO Working Group 17 (1966) Monographs on Oceanographic Methodology, 1. , Paris: UNESCO
  • Tatur, A., Ornithogenic soils of the maritime Antarctic (1989) Polish Polar Research, 10, pp. 481-532
  • Tell, G., Vinocur, A., Izaguirre, I., Cyanophyta of lakes and ponds of Hope Bay, Antarctic Peninsula (1995) Polar Biology, 15, pp. 513-1509
  • Vinocur, A., Izaguirre, I., Freshwater algae (excluding Cyanophyceae) from nine lakes and pools of Hope Bay, Antarctic Peninsula (1994) Antarctic Science, 6, pp. 483-489
  • Vinocur, A., Pizarro, H., Periphyton flora of some lotic and lentic environments of Hope Bay (Antarctic Peninsula) (1995) Polar Biology, 15, pp. 401-414

Citas:

---------- APA ----------
Pizarro, H., Izaguirre, I. & Tell, G. (1996) . Epilithic algae from a freshwater stream at Hope Bay, Antarctica. Antarctic Science, 8(2), 161-167.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v8_n2_p161_Pizarro [ ]
---------- CHICAGO ----------
Pizarro, H., Izaguirre, I., Tell, G. "Epilithic algae from a freshwater stream at Hope Bay, Antarctica" . Antarctic Science 8, no. 2 (1996) : 161-167.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v8_n2_p161_Pizarro [ ]
---------- MLA ----------
Pizarro, H., Izaguirre, I., Tell, G. "Epilithic algae from a freshwater stream at Hope Bay, Antarctica" . Antarctic Science, vol. 8, no. 2, 1996, pp. 161-167.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v8_n2_p161_Pizarro [ ]
---------- VANCOUVER ----------
Pizarro, H., Izaguirre, I., Tell, G. Epilithic algae from a freshwater stream at Hope Bay, Antarctica. ANTARCT. SCI. 1996;8(2):161-167.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09541020_v8_n2_p161_Pizarro [ ]