@article{fdi:010079448, title = {{C}omparison of mesozooplankton communities at three shallow seamounts in the {S}outh {W}est {I}ndian {O}cean}, author = {{N}oyon, {M}. and {R}asoloarijao, {Z}. and {H}uggett, {J}. and {T}ernon, {J}ean-{F}ran{\c{c}}ois and {R}oberts, {M}.}, editor = {}, language = {{ENG}}, abstract = {{S}eamounts are recognised as hotspots of biodiversity, attracting large numbers of top predators, but the underlying mechanisms are still unclear. {W}e studied mesozooplankton abundance and size distribution at three shallow seamounts (60 m, 240 m and 18 m deep) in the {S}outh {W}est {I}ndian {O}cean, along a latitudinal gradient (19 degrees {S}, 27 degrees {S} and 33 degrees {S}). {S}amples were analysed using a {Z}oo{S}can, allowing the use of a size-based approach. {D}ifferences were observed between seamount areas, but overall zooplankton communities did not seem to be affected by the changes in topography. {O}nly in the lee of {L}a {P}erouse seamount was the zooplankton community slightly more concentrated than upstream, suggesting that zooplankton were flushed downstream of the seamount. {T}he southernmost and shallowest seamount, {W}alters {S}hoal, had low abundance and its size spectrum differed greatly from the two other seamounts further north. {T}hese differences were attributed to seasonality and mesozooplankton population dynamics, whereas the other two seamounts exhibited a more "typical" oligotrophic pelagic ecosystem, at equilibrium and dominated by small organisms. {A}t the time of sampling, the unnamed seamount south of {M}adagascar was influenced by a mesoscale dipole that impacted the zooplankton distribution, potentially masking any seamount effect. {T}he normalised biomass size spectrum approach contributed to a better understanding of the ecosystem dynamics (i.e. equilibrium vs. non-steady state) but revealed little variability within a stable oligotrophic environment.}, keywords = {{N}ormalised biovolume size spectrum ({NBSS}) ; {M}esoscale eddies ; {T}opography ; {O}ligotrophic environment ; {P}elagic ecology ; {OCEAN} {INDIEN} ; {MADAGASCAR} {PLATEAU} ; {WALTERS} {BANC} ; {LA} {PEROUSE} {MONT}}, booktitle = {{B}io-physical coupling around three shallow seamounts in the {S}outh {W}estern {I}ndian {O}cean, with regional comparisons based on modelling, remote sensing and observational studies}, journal = {{D}eep-{S}ea {R}esearch {P}art {II} : {T}opical {S}tudies in {O}ceanography}, volume = {176}, numero = {{N}o sp{\'e}cial}, pages = {art. 104759 [17 ]}, ISSN = {0967-0645}, year = {2020}, DOI = {10.1016/j.dsr2.2020.104759}, URL = {https://www.documentation.ird.fr/hor/fdi:010079448}, }