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Abstract

This paper describes an Africa-Canada transect which was conducted in May and June 1993. Fv/Fm values were maximal at depth in the eastern Atlantic while low values were measured on the surface in the western Atlantic. The low Fv/Fm area was found to have the highest chl-normalised fluorescence yields. Differences in light absorption by phytoplankton from this area do not account for these increased yields. The higher quantum yield of fluorescence in these samples is probably produced by nutrient limitation (high Fo/chl, low Fv/Fm). The absorption measurements indicate higher absorption in the 400-450 nm region when compared with samples from other regions or from the chl-max. This may indicate the presence of phaetopigments, which would also indicate a nutrient limited population.

Additional information

Authors: OLAIZOLA M, JRC Ispra (IT);SCHLITTENHARDT P, JRC Ispra (IT);GEIDER R, University of Delaware, College of Marine Studies, Lewes (US);GRAZIANO L, University of Delaware, College of Marine Studies, Lewes (US)
Bibliographic Reference: Paper presented: Ocean Sciences Meeting, San Diego (US), February 21-25, 1994
Availability: Available from (1) as Paper EN 38203 ORA
Record Number: 199410481 / Last updated on: 1994-11-28
Category: PUBLICATION
Original language: en
Available languages: en