Stones challenge dating of Easter Island collapse | Science News

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Stones challenge dating of Easter Island collapse

Despite taking some hits, Polynesian farmers outlasted European contact

4:38pm, January 5, 2015
rock garden

ROCK ON  Easter Islanders cultivated fields such as this with volcanic rocks that leached nutrients into the soil. New evidence indicates that this practice continued after Europeans reached the island in 1722.

Easter Island’s farming society reorganized rather than collapsing before Europeans arrived in 1722, a new study suggests.

Residents of Easter Island, also known as Rapa Nui, sharply reduced farming at two previously thriving settlements decades before European explorers showed up, say archaeologist Christopher Stevenson of Virginia Commonwealth University in Richmond and his colleagues. One outpost near the coast received little rainfall and probably faced food shortages due to periodic droughts, instigating a farming decline that began around 1660, the scientists propose January 5 in the Proceedings of the National Academy of Sciences. After plentiful rain enabled farming to expand at an inland site starting around 1200, poor-quality soil triggered cultivation cutbacks starting around 1705 or 1710, they say.

Farming boomed in another part of the island, which had regular rainfall and relatively good soil, from the late 1600s to at least 1850, Stevenson

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