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Article Dans Une Revue The International Society of Microbiologial Ecology Journal Année : 2019

First report of vampyrellid predator–prey dynamics in a marine system

Résumé

We report for the first time the in situ dynamics of a vampyrellid in a marine system. A high sampling frequency (twice-weekly) was applied in a tropical eutrophic lagoon (Rio de Janeiro, Brazil) for 5 years (2012-2016). The vampyrellid Hyalodiscus sp. specifically fed on the diatom Chaetoceros minimus during a short time window (~3 months), although the prey was intermittently detected as the dominant phytoplanktonic species over a longer period (~1 year). A classic Lotka-Volterra predator-prey dynamic was observed between the two partners, with a significant modification of the short-term oscillations of the prey. Specific abiotic preferences (i.e., relatively low temperature, intermediate salinity, and stratified conditions) associated with prey availability seemed to define this narrow temporal window of occurrence. Our results suggest that vampyrellids can be ecologically relevant in marine pelagic systems, with their impact on planktonic dynamics strongly depending on complex interactions between both biotic and abiotic factors.
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Dates et versions

hal-02130563 , version 1 (23-05-2019)

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Catharina Alves-De-Souza, Tatiane S Benevides, Mariângela Menezes, Christian Jeanthon, Laure Guillou. First report of vampyrellid predator–prey dynamics in a marine system. The International Society of Microbiologial Ecology Journal, 2019, 13 (4), pp.1110-1113. ⟨10.1038/s41396-018-0329-0⟩. ⟨hal-02130563⟩
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