title: Significance of plankton community structure and nutrient availability for the control of dinoflagellate blooms by parasites: a modeling approach.
abstract: Dinoflagellate blooms are frequently observed under temporary eutrophication of coastal waters after heavy rains. Growth of these opportunistic microalgae is believed to be promoted by sudden input of nutrients and the absence or inefficiency of their natural enemies, such as grazers and parasites. Here, numerical simulations indicate that increasing nutrient availability not only promotes the formation of dinoflagellate blooms but can also stimulate their control by protozoan parasites. Moreover, high abundance of phytoplankton other than dinoflagellate hosts might have a significant dilution effect on the control of dinoflagellate blooms by parasites, either by resource competition with dinoflagellates (thus limiting the number of hosts available for infection) or by affecting numerical-functional responses of grazers that consume free-living parasite stages. These outcomes indicate that although both dinoflagellates and their protozoan parasites are directly affected by nutrient availability, the efficacy of the parasitic control of dinoflagellate blooms under temporary eutrophication depends strongly on the structure of the plankton community as a whole.
authors.affiliation: Laboratório de Ficologia, Departamento de Botânica, Museu Nacional/Universidade Federal do Rio de Janeiro, Quinta da Boa Vista S/N, São Cristóvão, Rio de Janeiro, RJ, Brasil.
authors.forename: Catharina
authors.initials: C
authors.lastname: Alves-de-Souza
authors.affiliation: UMR 9190 MARBEC Center of Marine Biodiversity, Exploitation & Conservation, CNRS, UM, IRD, IFREMER, Université Montpellier, Place E. Bataillon, CC 093, Montpellier, France.
authors.forename: David
authors.initials: D
authors.lastname: Pecqueur
authors.affiliation: UMR 9190 MARBEC Center of Marine Biodiversity, Exploitation & Conservation, CNRS, UM, IRD, IFREMER, Université Montpellier, Place E. Bataillon, CC 093, Montpellier, France; UMS 3282 OSU OREME-MEDIMEER, IRD, UM, CNRS, SMEL, 2 rue des Chantiers, Sète, France; UMR 9190 MARBEC Center of Marine Biodiversity, Exploitation & Conservation, CNRS, UM, IRD, IFREMER, SMEL, Sète, France.
authors.forename: Emilie
authors.initials: E
authors.lastname: Le Floc'h
authors.affiliation: UMS 3282 OSU OREME-MEDIMEER, IRD, UM, CNRS, SMEL, 2 rue des Chantiers, Sète, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Mas
authors.affiliation: UMR 9190 MARBEC Center of Marine Biodiversity, Exploitation & Conservation, CNRS, UM, IRD, IFREMER, Université Montpellier, Place E. Bataillon, CC 093, Montpellier, France.
authors.forename: Cécile
authors.initials: C
authors.lastname: Roques
authors.affiliation: UMR 9190 MARBEC Center of Marine Biodiversity, Exploitation & Conservation, CNRS, UM, IRD, IFREMER, Université Montpellier, Place E. Bataillon, CC 093, Montpellier, France.
authors.forename: Behzad
authors.initials: B
authors.lastname: Mostajir
authors.affiliation: UMR 9190 MARBEC Center of Marine Biodiversity, Exploitation & Conservation, CNRS, UM, IRD, IFREMER, Université Montpellier, Place E. Bataillon, CC 093, Montpellier, France.
authors.forename: Franscesca
authors.initials: F
authors.lastname: Vidussi
authors.affiliation: Ifremer, DYNECO PELAGOS, Plouzané, France.
authors.forename: Lourdes
authors.initials: L
authors.lastname: Velo-Suárez
authors.affiliation: Ifremer, DYNECO PELAGOS, Plouzané, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Sourisseau
authors.affiliation: UMR 9190 MARBEC Center of Marine Biodiversity, Exploitation & Conservation, CNRS, UM, IRD, IFREMER, SMEL, Sète, France.
authors.forename: Eric
authors.initials: E
authors.lastname: Fouilland
authors.affiliation: CNRS, UMR 7144 & Université Pierre et Marie Curie, Station Biologique de Roscoff, Place Georges Teissier, Roscoff, France.
authors.forename: Laure
authors.initials: L
authors.lastname: Guillou
mesh_terms: D000818:Animals; D003198:Computer Simulation; D004141:Dinoflagellida / Q000469:parasitology* / Q000502:physiology*; D005068:Eutrophication; D005502:Food; D008954:Models, Biological; D009716:Numerical Analysis, Computer-Assisted; D010271:Parasites / Q000502:physiology*; D010933:Plankton / Q000502:physiology*