@article{fdi:010095839,
  title = {{I}ncluding different mesozooplankton feeding strategies in a biogeochemical ocean model impacts global ocean biomass and carbon cycle},
  author = {{D}i {M}atteo, {L}. and {B}enedetti, {F}. and {A}yata, {S}. {D}. and {A}umont, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{M}esozooplankton present a wide range of functionally diverse heterotrophic organisms ranging from 200 mu m to 2 cm that are essential to marine ecosystems and biogeochemical cycles. {I}n most ocean biogeochemical models, mesozooplankton are represented as a single compartment along with microzooplankton (<0.2 mm), thereby overlooking their large functional diversity. {Y}et, observational and modelling studies relying on functional trait-based approaches showed how important the functional traits diversity of marine zooplankton is in driving ecosystem dynamics and biogeochemical cycles. {H}ere, we use such a functional trait-based approach by modelling the effect of various mesozooplankton feeding strategies on the ocean carbon cycle, using the global ocean biogeochemical model {PISCES}. {T}hree new mesozooplankton functional types ({PFT}s) and their associated trade-offs were integrated into {PISCES}: cruisers (active swimmers feeding on suspension particles), ambushers (passive suspension feeder, relying on a sit-and-wait strategy) and flux-feeders (passively feeding on particles). {A}n additional foraging effort was implemented for cruisers to account for the optimization of their active behaviour. {O}ur new configuration shows that these functional groups have distinct latitudinal and vertical distributions: the two suspension feeding groups (cruisers and ambushers) share the epipelagic zone, with ambushers being the dominant group globally (0.11 {G}t {C} yr(-1), 54.8 % of total mesozooplankton in the top 150 m) and cruise feeders (0.03 {G}t {C} yr(-1)) prevailing in the productive regions near the poles. {M}eanwhile, flux-feeders (0.06 {G}t {C} yr(-1)) dominate in the mesopelagic zone of coastal regions. {T}he change of parameters, thus trade-offs, in our sensitivity experiments also shows how we can modulate and even reverse the latitudinal pattern of suspension feeders. {F}inally, we demonstrate how the deep-dwelling flux-feeders directly affect carbon export at depth more strongly by consuming the particles that would otherwise be transported to deeper layers (the carbon export increases by 40.8 % when flux-feeders are removed). {T}his study emphasizes the necessity for a better integration of the trophic strategies of this planktonic compartment within global biogeochemical models.},
  keywords = {},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {22},
  numero = {22},
  pages = {7233--7268},
  ISSN = {1726-4170},
  year = {2025},
  DOI = {10.5194/bg-22-7233-2025},
  URL = {https://www.documentation.ird.fr/hor/fdi:010095839},
}