During tough times, ancient ‘tourists’ sought solace in Florida oyster feasts

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More than a thousand years ago, people from across the Southeast regularly traveled to a small island on Florida’s Gulf Coast to bond over oysters, likely as a means of coping with climate change and social upheaval.
During tough times, ancient 'tourists' sought solace in Florida oyster feasts
Out-of-towners flocked to ceremonial sites on Florida’s Gulf Coast for hundreds of years to socialize and feast. Crystal River
 was home to one of the most prominent sites, which featured shell mounds, a plaza and a burial ground
with distinct ceramics known as Weeden Island pottery [Credit: Thomas J. Pluckhahn]

Archaeologists’ analysis of present-day Roberts Island, about 50 miles north of Tampa Bay, showed that ancient people continued their centuries-long tradition of meeting to socialize and feast, even after an unknown crisis around A.D. 650 triggered the abandonment of most other such ceremonial sites in the region. 

For the next 400 years, out-of-towners made trips to the island, where shell mounds and a stepped pyramid were maintained by a small group of locals. But unlike the lavish spreads of the past, the menu primarily consisted of oysters, possibly a reflection of lower sea levels and cool, dry conditions.




People’s persistence in gathering at Roberts Island, despite regional hardship, underscores their commitment to community, said study lead author C. Trevor Duke, a researcher in the Florida Museum of Natural History’s Ceramic Technology Lab.
“What I found most compelling was the fact that people were so interested in keeping their ties to that landscape in the midst of all this potential climate change and abandonment,” said Duke, a Ph.D. candidate in the University of Florida department of anthropology. “They still put forth the effort to harvest all these oysters and keep these social relationships active. These gatherings probably occurred when different groups of people were getting together and trying to figure out the future.”
During tough times, ancient 'tourists' sought solace in Florida oyster feasts
People gathered at Crystal River for religious ceremonies and feasts between A.D. 50-650. With shell mounds,
a burial ground and a large plaza, the ceremonial center grew while temperatures and sea levels were high
[Credit: Thomas J. Pluckhahn]

Duke and his collaborators compared animal remains from shell mounds and middens – essentially kitchen trash heaps – at Roberts Island and Crystal River, home to an older, more prominent ceremonial site. Their findings showed Crystal River residents “pulled out all the stops” for ritual feasts, regaling visitors with deer, alligator, sharks and dozens of other dishes, while at Roberts Island, feasts consisted of “oysters and very little else,” Duke said.

The Roberts Island ceremonial site, which was vacated around A.D. 1050, was one of the last outposts in what was once a flourishing network of religious sites across the Eastern U.S. These sites were characterized by burial grounds with distinctly decorated ceramics known as Swift Creek and Weeden Island pottery. 




What differentiated Roberts Island and Crystal River from other sites was that their continuous occupation by a small group of residents who prepared for the influx of hundreds of visitors – not unlike Florida’s tourist towns today.
“These were very cosmopolitan communities,” Duke said. “I’m from Broward County, but I also spent time in the Panhandle, so I’m used to being part of a small residential community that deals with a massive population boom for a month or two months a year. That has been a Florida phenomenon for at least two thousand years.”
During tough times, ancient 'tourists' sought solace in Florida oyster feasts
When climate change and social upheaval hit the Southeast, people still regularly gathered at Roberts Island on Florida’s
Gulf Coast, maintaining their long tradition of communal rituals. But the lavish feasts of the pasts had dwindled to
 a menu of oysters and little else [Credit: Thomas J. Pluckhahn]

Archaeologists estimate small-scale ceremonies began at Crystal River around A.D. 50, growing substantially after a residential community settled the site around A.D. 200. Excavations have uncovered minerals and artifacts from the Midwest, including copper breastplates from the Great Lakes. Similarly, conch shells from the Gulf Coast have been found at Midwestern archaeological sites.

“There was this long-distance reciprocal exchange network going on across much of the Eastern U.S. that Crystal River was very much a part of,” Duke said.




Religious ceremonies at Crystal River included ritual burials and marriage alliances, Duke said, solidifying social ties between different groups of people. But the community was not immune to the environmental and social crises that swept the region, and the site was abandoned around A.D. 650. 
A smaller ceremonial site was soon established less than a mile downstream on Roberts Island, likely by a remnant of the Crystal River population.
During tough times, ancient 'tourists' sought solace in Florida oyster feasts
Roberts Island was one of the last ceremonial sites of a once-flourishing religious network. A small population
settled the island after an unknown crisis triggered most other such sites to be abandoned
[Credit: Thomas J. Pluckhahn]

Duke and his collaborators collected samples from mounds and middens at the two ceremonial sites, identifying the species present and calculating the weight of the meat they would have contained. They found that feasts at hard-strapped Roberts Island featured far fewer species. 

Meat from oysters and other bivalves accounted for 75% of the weight of Robert Island samples and roughly 25% of the weight from Crystal River. Meat from deer and other mammals made up 45% of the weight in Crystal River samples and less then 3% from Roberts Island.




Duke said evidence suggests that Roberts Island residents also had to travel farther to harvest food. As sea levels fell, oyster beds may have shifted seaward, possibly explaining why the Crystal River population relocated to the island, which was small and had few resources.
“Previous research suggests that environmental change completely rearranged the distribution of reefs and the ecosystem,” Duke said. “They had to go far out to harvest these things to keep their ritual program active.”
During tough times, ancient 'tourists' sought solace in Florida oyster feasts
This example of Weeden Island pottery was recovered from the burial mound complex
at Crystal River [Credit: Thomas J. Pluckhahn]

No one knows what caused the widespread abandonment of most of the region’s ceremonial sites in A.D. 650, Duke said. But the production of Weeden Island pottery, likely associated with religious activities, ramped up as bustling sites became ghost towns.

“That’s kind of counterintuitive,” he said. “This religious movement comes on really strong right as this abandonment is happening. It almost seems like people were trying to do something, create some kind of intervention to stop whatever was happening.”
The study is published in Southeastern Archaeology.

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