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Titolo:
EFFECTS OF LIGHT-INTENSITY, WATER VELOCITY, AND SPECIES COMPOSITION ON CARBON AND NITROGEN STABLE-ISOTOPE RATIOS IN PERIPHYTON
Autore:
MACLEOD NA; BARTON DR;
Indirizzi:
UNIV WATERLOO,DEPT BIOL WATERLOO ON N2L 3G1 CANADA
Titolo Testata:
Canadian journal of fisheries and aquatic sciences
fascicolo: 8, volume: 55, anno: 1998,
pagine: 1919 - 1925
SICI:
0706-652X(1998)55:8<1919:EOLWVA>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
FOOD WEBS; ABUNDANCE MEASUREMENTS; ORGANIC-MATTER; VARIABILITY; DELTA-C-13; FRACTIONATION; MACROPHYTES; ENVIRONMENT; SEAGRASSES; ALGAE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
N.A. Macleod e D.R. Barton, "EFFECTS OF LIGHT-INTENSITY, WATER VELOCITY, AND SPECIES COMPOSITION ON CARBON AND NITROGEN STABLE-ISOTOPE RATIOS IN PERIPHYTON", Canadian journal of fisheries and aquatic sciences, 55(8), 1998, pp. 1919-1925

Abstract

Periphyton was allowed to grow on glass plates suspended in the watercolumn of a small stream under two conditions of light and water velocity, over two seasons, to assess the influence of the thickness of benthic boundary layers on stable isotope fractionation. Isotopic signatures for both carbon and nitrogen in samples of periphyton varied withlight intensity and season, but not with current velocity. In summer,periphyton grown under low-light conditions had depleted delta(13)C and delta(15)N values relative to periphyton grown under high light. Inautumn, isotopic signatures were generally more depleted than in summer, but did not vary systematically with light intensity or water velocity. These results suggest that isotopic fractionation in periphyton was more strongly influenced by the intensity of metabolic activity than by variations in the thickness of the benthic boundary layer.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/21 alle ore 05:57:35