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Cyanobacteria distribution across the Western Mediterranean divergence: a proof of pigment adaptation in different light conditions
Algarra, P.; Vaqué, D. (1989). Cyanobacteria distribution across the Western Mediterranean divergence: a proof of pigment adaptation in different light conditions, in: Ros, J.D. (Ed.) Topics in Marine Biology: Proceedings of the 22nd European Marine Biology Symposium, Barcelona, Spain, August 1987. Scientia Marina (Barcelona), 53(2-3): pp. 197-202
In: Ros, J.D. (Ed.) (1989). Topics in marine biology: Proceedings of the 22nd European Marine Biology Symposium, Barcelona, Spain, August 1987. European Marine Biology Symposia, 22. Scientia Marina (Barcelona), 53(2-3). 145-754 pp., meer
In: European Marine Biology Symposia., meer
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Documenttype: Congresbijdrage
Trefwoord
    Marien/Kust
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  • Algarra, P.
  • Vaqué, D.
Abstract
    The vertical distribution of C-phycoerythrin (CPR) and the photosynthetic prokariotic picoplankters Synechococcus spp. across the western Mediterranean divergence was studied twice during the year 1986 (June and November). The maximum concentration of CPR in the water column occurred at the same depth as the DCM (deep chlorophyll maximum). However, the maximum concentration of Synechococcus spp. were located at different depths. No correlation was detected between their vertical distribution, the nutricline and the light gradient, contrary to the nanoplanktonic fraction of the phytoplankton. The contribution of cyanobacteria picoplankters to deep pigment maxima consists in a physiological process of pigment adaptation. The increase in CPR per cell with depth and with decreasing irradiance in the late summer samples suggests the existence of ontogenetic pigment adaptation to light intensity with the available environmental nutrients.
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