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2006•Helmholtz-Zentrum für Polar-und Meeresforschung (Alfred-Wegener-Institut)Open access

Response of microzooplankton to iron-induced phytoplankton blooms in the Southern Ocean

Joachim Henjes, Philipp Assmy, Christine Klaas, Victor Smetacek, Marina Montresor

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Abstract

Conclusions• The changes in the dynamics and structure within the microzooplankton during the experiments suggest that their grazing constrained pico-and nanoplankton populations, but mainly species capable of feeding on large diatoms were selectively predated by the metazoan community.→ Tight coupling between prey and predators regulated population dynamics and facilitated population growth of diatoms (trophic cascade) which dominated the iron-induced phytoplankton bloom.

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Conclusions• The changes in the dynamics and structure within the microzooplankton during the experiments suggest that their grazing constrained pico-and nanoplankton populations, but mainly species capable of feeding on large diatoms were selectively predated by the metazoan community.→ Tight coupling between prey and predators regulated population dynamics and facilitated population growth of diatoms (trophic cascade) which dominated the iron-induced phytoplankton bloom.

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Available abstract

Conclusions• The changes in the dynamics and structure within the microzooplankton during the experiments suggest that their grazing constrained pico-and nanoplankton populations, but mainly species capable of feeding on large diatoms were selectively predated by the metazoan community.→ Tight coupling between prey and predators regulated population dynamics and facilitated population growth of diatoms (trophic cascade) which dominated the iron-induced phytoplankton bloom.

Key concepts: Phytoplankton, Pelagic zone, Oceanography, Trophic level, Biomass (ecology), Population, Environmental science, Spring bloom

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Response of microzooplankton to iron-induced phytoplankton blooms in the Southern Ocean — Research Paper | ScholarLens