Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
NUTRIENT LIMITATION IN RELATION TO PHYTOPLANKTON CAROTENOID CHLOROPHYLL-A RATIOS IN FRESH-WATER MESOCOSMS
Autore:
SCHLUTER L; RIEMANN B; SONDERGAARD M;
Indirizzi:
NATL ENVIRONM RES INST,DEPT MARINE ECOL & MICROBIOL,POB 358 DK-4000 ROSKILDE DENMARK VKI WATER QUAL INST,INT AGCY 14C DETERMINAT DK-2970 HORSHOLM DENMARK
Titolo Testata:
Journal of plankton research
fascicolo: 7, volume: 19, anno: 1997,
pagine: 891 - 906
SICI:
0142-7873(1997)19:7<891:NLIRTP>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTOZOAN OXYRRHIS-MARINA; PHYSIOLOGICAL INDICATORS; PIGMENT COMPOSITION; GROWTH-RATE; DIGESTIVE ACCLIMATION; XANTHOPHYLL-CYCLE; ALGAL PIGMENTS; HETEROCAPSA SP; HPLC ANALYSIS; NITROGEN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
45
Recensione:
Indirizzi per estratti:
Citazione:
L. Schluter et al., "NUTRIENT LIMITATION IN RELATION TO PHYTOPLANKTON CAROTENOID CHLOROPHYLL-A RATIOS IN FRESH-WATER MESOCOSMS", Journal of plankton research, 19(7), 1997, pp. 891-906

Abstract

The 480/665 nm absorption ratio for pigment extracts was evaluated asan indicator of nutrient limitation using freshwater plankton communities and a mesocosm approach. The mesocosm design was used to create various nutrient regimes for the phytoplankton communities, and nutrient limitation was detected by means of growth response assays (C-14 fixation and pigment increase following addition of nutrients) and the 480/665 ratio. Results from four periods in 1993 and one period in 1994 showed that high 480/665 ratios (indicative of nutrient limitation) were only found at chlorophyll a concentrations <20 mu g l(-1), where nutrient limitation was not detected. Periods with potential nutrient limitation exhibited low 480/665 ratios. Consequently, the absolute values of the 480/665 ratio could not be used to predict nutrient limitation. However, when nutrients were added to nutrient-limited phytoplankton communities in growth response assays, the ratio decreased, indicating that the 480/665 ratio can be used as a relative index to detect nutrient limitation in bioassays.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/01/21 alle ore 22:23:18