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Titolo:
Epilithic biomass in an outflow stream at Potter Peninsula, King George Island, Antarctica
Autore:
Pizarro, H; Vinocur, A;
Indirizzi:
Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, RA-1428Buenos Aires, DF, Argentina Univ Buenos Aires Buenos Aires DF Argentina RA-1428 Aires, DF, Argentina
Titolo Testata:
POLAR BIOLOGY
fascicolo: 12, volume: 23, anno: 2000,
pagine: 851 - 857
SICI:
0722-4060(200012)23:12<851:EBIAOS>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRESH-WATER STREAM; SIGNY ISLAND; HOPE-BAY; ECOSYSTEMS; ALGAE; DYNAMICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Pizarro, H Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Ciencias Biol, EHA, RA-1428 Buenos Aires, DF, Argentina Univ Buenos Aires EHA Buenos Aires DF Argentina RA-1428 gentina
Citazione:
H. Pizarro e A. Vinocur, "Epilithic biomass in an outflow stream at Potter Peninsula, King George Island, Antarctica", POLAR BIOL, 23(12), 2000, pp. 851-857

Abstract

The epilithic biomass of an outflow stream at Potter Peninsula (King George Island, Antarctica) was studied from November 1996 to February 1997 by means of chlorophyll a concentration, dry weight and ash-free dry weight. TheAutotrophic Index and the Lakatos classification were also used in order to characterize the epilithic community. Several physical and chemical parameters were analyzed. Snow and ice melt greatly increased water flow throughTres Hermanos Lake and in the stream. Chlorophyll a concentrations fluctuated between undetectable and 3.5 mug cm(-2) with a marked increase, which averaged 3 orders of magnitude, towards the end of the study period. Dry weight ranged between 299.9 and 13,118.7 mug cm(-2) and ash-free dry weight between 70.8 and 996.9 mug cm(-2). According to the Autotrophic Index and theLakatos classification, the epilithon of the stream had a low mass with low organic component and large amount of inorganic sediment. The organic matter comprised a low proportion of chlorophyll a and a major proportion of probably detritus or bacteria, rather than fauna.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 03:26:39