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| Norse communities thrived for more than 400 years in the Arctic, hunting walruses for their tusks, a valuable medieval commodity (AFP Photo/COREY ACCARDO) |
Paris (AFP) - Greenland's medieval Norse society vanished from the Earth in the 15th Century after they hunted walrus populations to near extinction, researchers said Monday in a possible explanation for the mysterious disappearance.
Norse
communities thrived for more than 400 years in the Arctic, hunting walruses for
their tusks, a valuable medieval commodity.
But a
mixture of overexploitation and economic pressure from a flood of elephant
ivory into European markets in the 13th Century contributed to their downfall,
according to a new study.
A team of
researchers from the universities of Cambridge, Oslo and Trondheim examined
pre-1400s walrus tusk artefacts from across Europe and found that almost all of
them came from walruses hunted in seas only accessible to Greenland Norse
communities.
They also
found that later items were hunted from smaller animals -- likely females and
infants -- signalling that stocks were rapidly dwindling.
"Norse
Greenlanders needed to trade with Europe for iron and timber, and mainly had
walrus products to export in exchange," said James Barrett, from the
University of Cambridge's Department of Archaeology.
"Norse
hunters were forced to venture deeper into the Arctic Circle for increasingly
meagre ivory harvests."
As the
walrus populations declined, so did the Norse communities.
Authors of
the study, published in the Quarternary Science Reviews journal, said there
were likely other factors that contributed to the eventual disappearance of
Norse Greenlanders.
These
include climate change as the northern hemisphere underwent a "Little Ice
Age", and unsustainable farming techniques.
"If
both the population and price of walrus started to tumble, it must have badly
undermined the resilience of the settlements," said Bastiaan Star of the
University of Oslo.
"Our
study suggests the writing was on the wall."
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