Research Output
Response of temperate microplankton communities to N:Si ratio perturbation
  In order to study the effect of the nitrogen:silicon (N:Si) ratio on temperate microplankton food webs, mesocosm experiments were conducted in Trondheim (Norway) using two different ratios (molar ratios of 1:1 and 4:1). With the exception of diatoms, the increase in abundance of all microbial groups [phototrophic nanoflagellates, autotrophic dinoflagellates, bacteria, heterotrophic nanoflagellates (HNAN), heterotrophic microflagellates and ciliates] was significantly greater in the high N:Si treatment. Midway through the experiment, HNAN biovolume exceeded that of bacteria in the high N:Si treatment, indicating strong top-down grazing control. Heterotrophic microflagellate biovolume exceeded ciliate biovolume under both nutrient regimes. However, hetero-trophic plankton failed to respond rapidly to increased diatom biomass. The heterotrophic:auto-trophic biovolume ratio remained

  • Type:


  • Date:

    01 December 2003

  • Publication Status:


  • Publisher

    Oxford University Press (OUP)

  • DOI:


  • ISSN:


  • Library of Congress:

    QH301 Biology

  • Dewey Decimal Classification:

    577.7 Marine ecology

  • Funders:

    European Commission


Roberts, E. C., Davidson, K., & Gilpin, L. (2003). Response of temperate microplankton communities to N:Si ratio perturbation. Journal of plankton research, 25(12), 1485-1495.



Ecology; Aquatic Science; Ecology, Evolution, Behavior and Systematics

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