By Brandon Keim April 12, 2010 | 3:00 pm | Categories: Agriculture, Anthropology
A vast series of earth mounds on the eastern coast of South America may be living landscape fossils of a forgotten civilization’s agriculture.
People raised the mounds between 1,000 and 700 years ago in order to create cropland in terrain that is flooded for half the year, and parched for the other half. New insect ecosystems formed on the mounds, further enriching the soils and keeping them fertile for centuries, long after their human stewards had vanished. This lost agricultural system could be a model for modern farmers, according to a new study.
“Today these lands are used for cattle ranching or hunting. People think agriculture must not be possible in these areas,” said ecologist Doyle McKey of the University of Montpellier in France, co-author of a study published April 12 in the Proceedings of the National Academy of Sciences. “The common conception is that these areas are wastelands.”
McKey and a team of archaeologists, paleobiologists and soil scientists describe the earthworks, which run for 360 miles from the Berbice River to Cayenne, the modern-day capital of Guyana.
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http://www.wired.com/wiredscience/2010/04/lost-amazon-farms/