@article{fdi:010079444,
  title = {{C}onnectivity between seamounts and coastal ecosystems in the {S}outhwestern {I}ndian {O}cean},
  author = {{C}rochelet, {E}stelle and {B}arrier, {N}icolas and {A}ndrello, {M}. and {M}arsac, {F}rancis and {S}padone, {A}. and {L}ett, {C}hristophe},
  editor = {},
  language = {{ENG}},
  abstract = {{U}nderstanding larval connectivity patterns is critical for marine spatial planning, particularly for designing marine protected areas and managing fisheries. {P}atterns of larval dispersal and connectivity can be inferred from numerical transport models at large spatial and temporal scales. {W}e assess model-based connectivity patterns between seamounts of the {S}outhwestern {I}ndian {O}cean ({SWIO}) and the coastal ecosystems of {M}auritius, {L}a {R}eunion, {M}adagascar, {M}ozambique and {S}outh {A}frica, with emphasis on three shallow seamounts ({L}a {P}erouse [{LP}], {MAD}-{R}idge [{MR}] and {W}alters {S}hoal [{WS}]). {U}sing drifter trajectory and a {L}agrangian model of ichthyo-plankton dispersal, we show that larvae can undertake very long dispersion, with larval distances increasing with pelagic larval duration ({PLD}). {T}here are three groups of greater connectivity: the region between the eastern coast of {M}adagascar, {M}auritius and {L}a {R}eunion islands; the seamounts of the {S}outh {W}est {I}ndian {R}idge; and the pair formed by {WS} and a nearby un-named seamount. {C}onnectivity between these three groups is evident only for the longest {PLD} examined (360 d). {C}onnectivity from seamounts to coastal ecosystems is weak, with a maximum of 2% of larvae originating from seamounts reaching coastal ecosystems. {L}ocal retention at the three focal seamounts ({LP}, {MR} and {WS}) peaks at about 11% for the shortest {PLD} considered (15 d) at the most retentive seamount ({WS}) and decreases sharply with increasing {PLD}. {I}nformation on {PLD} and age of larvae collected at {MR} and {LP} are used to assess their putative origin. {T}hese larvae are likely self-recruits but it is also plausible that they immigrate from nearby coastal sites, i.e. the southern coast of {M}adagascar for {MR} and the islands of {L}a {R}eunion and {M}auritius for {LP}.},
  keywords = {{S}eamounts ; {C}onnectivity ; {L}arval duration ; {L}arval drift ; {L}agrangian modelling ; {B}iophysical model ; {S}urface drifters ; {S}outhwestern indian ocean ; {I}chthyop ; {OCEAN} {INDIEN} ; {MADAGASCAR} ; {REUNION} ; {MAURICE} ; {MOZAMBIQUE} ; {AFRIQUE} {DU} {SUD} ; {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. 104774 [18 ]},
  ISSN = {0967-0645},
  year = {2020},
  DOI = {10.1016/j.dsr2.2020.104774},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079444},
}