Pelagic Sargassum has been arriving in extraordinary large volumes at the Mexican Caribbean beaches since 2014 where it negatively affects the ecosystem, tourism, fishery and human health. Recent work demonstrated that the Sargassum originates from a newly established source region in the tropic Atlantic wherefrom it gets exported to the Caribbean Sea under the influence of ocean currents and wind. 

Berriel, D., Mariño, I.J., Ojeda, E., Enríquez, C., Mendoza, E.T., Gracia, D. 2017. Condiciones oceanográficas de arribo y dispersión masiva de Sargassum Spp. en la laguna arrecifal de Puerto Morelos, Quintana Roo. Reunión Anual de la Unión Geofísica Mexicana 2017.

L. Montoya, J. Rutten, J. Arriaga, E. Escalante, C. Appendini . Sargassum events at Puerto Morelos. Reunión Anual de la Unión Geofísica Mexicana 2020.
https://www.raugm.org.mx/resumenes/sessions/abstract.php?abstractID=412&source=session