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Oceanographic mechanisms that possibly explain dominance of neritic-tropical zooplankton species assemblages around the Islas Marías Archipelago, Mexico
AUTHORS: Gómez-Gutiérrez, J., Funes-Rodríguez, R., Arroyo-Ramírez, K., Sánchez-Ortíz, C.A., Beltrán-Castro, J.R., Hernández-Trujillo, S., Palomares-García, R., Aburto-Oropeza, O. and Ezcurra, E.
DATE: November 2014
The similarity of multiple neritic and tropical species in the zooplankton assemblage from the archipelago and Cape Corriented suggests strong coastal-insular plankton connectivity.
For this study, samples of nearshore zooplankton species of Islas Marías Archipelago, Mexico, were analyzed. Crustaceans dominated the zooplankton assemblage numerically by 92.3% [Copepoda (79.2%), Decapoda larvae (4.7%), Cladocera (3.7%), Mysidacea (2.7%), and Euphausiacea (2.0%)]. The other 15 taxonomic groups (7.7% combined) were each less than 1.5% of the relative abundance. Species richness included 259 taxa (121 identified to species, 117 to genus, and 21 not identified). The similarity of multiple neritic and tropical species in the zooplankton assemblage from the archipelago and Cape Corrientes suggested strong coastal-insular plankton connectivity. Eddies generated by coastal upwelling and northward regional oceanic circulation were most likely responsible for establishing this connectivity.