@article{fdi:010064876,
  title = {{I}nteractions between microplastics and phytoplankton aggregates : impact on their respective fates},
  author = {{L}ong, {M}. and {M}oriceau, {B}. and {G}allinari, {M}. and {L}ambert, {C}. and {H}uvet, {A}. and {R}affray, {J}ean and {S}oudant, {P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{P}lastic debris are resistant to degradation, and therefore tend to accumulate in marine environment. {N}evertheless recent estimations of plastic concentrations at the surface of the ocean were lower than expected leading the communities to seek new sinks. {A}mong the different processes suggested we chose to focus on the transport of microplastics from the surface to deeper layers of the ocean via phytoplankton aggregates that constitute most of the sinking flux. {I}nteractions between microplastics and aggregates were studied by building a new device: the flow-through roller tank that mimics the behaviour of laboratory made aggregates sinking through a dense layer of microplastics. {T}hree types of aggregates formed from two different algae species (the diatom {C}haetoceros neogracile, the cryptophyte {R}hodomonas salina and a mix) were used as model. {W}ith their frustule made of biogenic silica which is denser than the organic matter, diatom aggregates sunk faster than {R}. sauna aggregates. {D}iatom aggregates were on average bigger and stickier while aggregates from {R}. sauna were smaller and more fragile. {W}ith higher concentrations measured in {R}. saline aggregates, all model-aggregates incorporated and concentrated microplastics, substantially increasing the microplastic sinking rates from tenths to hundreds of metres per day. {O}ur results clearly show that marine aggregates can be an efficient sink for microplastics by influencing their vertical distribution in the water column. {F}urthermore, despite the high plastic concentrations tested, our study opens new questions regarding the impact of plastics on sedimentation fluxes in oceans. {A}s an effect of microplastic incorporation, the sinking rates of diatom aggregates strongly decreased meanwhile the sinking rates of cryptophyte aggregates increased.},
  keywords = {{M}icroplastic sink ; {V}ertical export ; {D}iatom and cryptophyte aggregates ; {S}ettling rate ; {P}ermeability},
  booktitle = {},
  journal = {{M}arine {C}hemistry},
  volume = {175},
  numero = {{SI}},
  pages = {39--46},
  ISSN = {0304-4203},
  year = {2015},
  DOI = {10.1016/j.marchem.2015.04.003},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064876},
}