@article{fdi:010091270,
  title = {{P}otential bottom-up and top-down control of large microzooplankton in response to contrasting productive scenarios in the tropical southwestern {A}tlantic},
  author = {{T}osetto, {E}. {G}. and {N}eumann-{L}eitao, {S}. and {F}arias, {G}. {B}. and {M}elo, {P}amd and {N}eto, {F}. {D}. {P}. and {C}arr{\'e}, {C}laire and {B}ertrand, {A}rnaud},
  editor = {},
  language = {{ENG}},
  abstract = {{L}arge microzooplankton, comprising organisms generally between 64 and 200 mu m, plays a significant trophic role in marine ecosystems as primary or secondary consumers. {I}n oligotrophic systems such as the {T}ropical {S}outhwestern {A}tlantic, where primary production is dominated by {C}yanobacteria, they provide a pivotal link between the basis of food webs and higher trophic levels. {I}n this region, seasonal variations in circulation and continental runoff and wind mixing induce heightened phytoplankton biomass during autumn when compared to a less productive scenario observed in spring, leading to increased abundances of higher trophic levels. {I}n order to establish the connection between primary producers and these higher trophic levels, we investigated the dynamics of large microzooplankton abundance in response to variations in phytoplankton biomass across different systems in the {T}ropical {S}outhwestern {A}tlantic. {O}ur findings highlight the complex interactions between bottom-up and top-down control mechanisms that shape large microzooplankton assemblages in these ecosystems. {T}he increase in primary production was accompanied by an observable increase in the abundances of large microzooplankton organisms over the continental shelf, thereby supporting the hypothesis of bottom-up control. {I}n contrast, offshore, in the {S}outh {E}quatorial {C}urrent {S}ystem, a lower abundance of large microzooplankton was observed in the more productive scenario. {T}he intricate relationships between large microzooplankton and higher trophic levels, particularly planktonic cnidarians, appear to be a key driver of these contrasting patterns. {T}he presence of voracious gelatinous predators in the offshore systems, suggests a scenario in which top-down predation may counteract the expected bottom-up response of large microzooplankton to increased phytoplankton biomass. {T}his indicates the importance of considering the entire trophic web when analysing the responses of large microzooplankton to changes in primary production.},
  keywords = {{C}opepoda ; {F}oraminifera ; {M}arine plankton ; {W}estern boundary current ; system ; {O}ligotrophic ; {ATLANTIQUE} ; {ZONE} {TROPICAL}},
  booktitle = {},
  journal = {{J}ournal of {M}arine {S}ystems},
  volume = {246},
  numero = {},
  pages = {104010 [16 p.]},
  ISSN = {0924-7963},
  year = {2024},
  DOI = {10.1016/j.jmarsys.2024.104010},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091270},
}