Changes in invertebrate taxa at two pre-Columbian sites in southwestern Jamaica, AD 800–1500

Excavations at two pre-Columbian sites at Paradise Park, Parish of Westmoreland, Jamaica, revealed significant changes in mollusk use through time. The sites are located on a low dune ridge in a tropical forest between a mangrove swamp and sawgrass morass on Bluefields Bay. One site (Wes-15a) dates to the 9th century AD and contains only Ostionan (redware) pottery. It is located 240 m to the east of a Meillacan (White Marl/Montego Bay style) site dated to the 15th century AD (Wes-15b). The molluscan fauna in the Ostionan site is dominated by species that prefer freely circulating, high salinity seagrass habitats (i.e., Strombidae, Cardiidae, and Veneridae). In marked contrast, Lucinidae and Melongenidae dominate the Meillacan deposits, taxa that favor habitats of low circulation, lower salinity, and muddier substrates that are often associated with mangroves in Jamaica. Cultural and environmental factors that may have contributed to the observed shift in resource use are discussed.