Sunday, July 10, 2011

Pacific sea life moving east via NW Passage

Pacific species migrating through warmer Northwest Passage

National Post: Set loose by an ice-free Northwest Passage, an invasion force of Pacific sea creatures are moving east to Atlantic waters... Last summer, European scientists were baffled when a grey whale appeared off Israel...

Killer whales have been capitalizing on the melting Arctic... Wary of the ferocious newcomers, bowhead whales, narwhal and beluga have all been spotted staying near shore and swimming in unnaturally tight formations. The Humboldt squid, a creature once seen only off the South American coast, has gradually worked its way north into ice-filled waters off Alaska...

The invasion is already bad news for Newfoundland's ravaged Atlantic cod. While the decimated cod stock may no longer be threatened by fishing nets, they are 'facing a potentially mutating ecosystem.. Arctic char are already facing tough competition for food by schools of east-moving capelin, a small forage fish...

An Arctic shipping traffic ramps up, the migration of sea life will only increase as crustaceans and plankton hitch rides east on Europe-bound freighters. Following the construction of the Suez Canal... the Mediterranean Sea became overcome with invasive species swimming over from the Red Sea... Species used to move freely between the Atlantic and Pacific, but they were isolated by the introduction of polar ice. Pacific and Atlantic counterparts are now poised for their first meeting in several million years.
Image source here.