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espanolSe realizo una investigacion de campo de las comunidades de playas arenosas en 10 sitios al norte y sur del Estado de Quintana Roo, Mexico, en 2011. Para cada playa se realizaron 3 transectos perpendiculares a la costa con un numero variable de niveles dependiendo de la longitud de la playa. Las pendientes de las playas fueron tambien variables; sin embargo, como patron recurrente, la parte sur de cada playa fue mas extensa que la parte norte. La fauna mejor representada fue la de los moluscos (18 especies), aunque tambien se registraron otros grupos como: crustaceos (4), anelidos (4), sipunculidos (1), nemertinos (1), foraminiferos (4) e insectos (1). Los analisis numericos dividieron el litoral de la costa en sitios de la Rivera Maya que tuvieron mayor riqueza y diversidad de la fauna y en sitios de ubicados en la Gran Costa Maya que fueron los menos diversos. El ensamblaje que formaron los sitios a partir de los grupos principales muestran afinidades entre sitios cercanos, pero tambien permitio detectar diferencias entre zonas en una misma region. Utilizando un analisis divisivo del contenido de informacion de segundo orden, para los diferentes grupos, se obtuvo las especies responsables de la mayor caida de informacion; en los moluscos, fue Terebra tuberculosa, mientras que para los anelidos fue Scoloplos latum y para los foraminiferos Bigenerina angulata. Se propone un estudio a mayor plazo para este ecosistema. EnglishField research of macrofaunal communities of sandy beaches at 10 sites of the central and southern coast of Quintana Roo State, was performed in 2011. For each beach 3 transects were conducted perpendicular to the coast with a variable number of levels depending on the length of the beach. The slopes of the beaches were also variable; however, as a recurring pattern, the southern part of each beach was wider than the northern part. The best represented fauna were mollusks (18 species), but also other groups were recorded such as crustaceans (4), annelids (4), sipunculids (1), nemerteans (1), foraminifera (4) and insects (1). The numerical analysis divided the coast of the state in areas of the Maya Rivera, that were more diverse and richness in fauna, while the sites located in the Gran Costa Maya were the least diverse. The assemblage sites representing the major groups show affinities between nearby sites, but are able to detect differences between areas in the same region. Using a content analysis divisive second-order information, for different groups, the species responsible for most decrease of information was obtained; in mollusks, was Terebra tuberculosa, whereas annelids was Scoloplos latum and for foraminifera Bigenerina angulata. A long-term study is proposed for this ecosystem.

Las playas arenosas de Quintana Roo, México: La diversidad de su fauna intermareal