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Warming oceans cause largest movement of marine species in two million years http://apocadocs.com/s.pl?1309230679
Warming ocean waters are causing the largest movement of marine species seen on Earth in more than two million years, according to scientists.
In the Arctic, melting sea ice during recent summers has allowed a passage to open up from the Pacific ocean into the North Atlantic, allowing plankton, fish and even whales to into the Atlantic Ocean from the Pacific.
The discovery has sparked fears delicate marine food webs could be unbalanced and lead to some species becoming extinct as competition for food between the native species and the invaders stretches resources....
The highly venomous Portuguese Man-of-War, which is normally found in subtropical waters, is also regularly been found in the northern Atlantic waters....
"In 1999 we discovered a species in the north west Atlantic that we hadn't seen before, but we know from surveys in the north Pacific that it is very abundant there.
"This species died out in the Atlantic around 800,000 years ago due to glaciation that changed the conditions it needed to survive.
"The implications are huge. The last time there was an incursion of species from the Pacific into the Atlantic was around two to three million years ago....
"Large numbers of species were introduced from the Pacific and made large numbers of local Atlantic species extinct.
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[Read more stories about:
jellyfish, holyshit, ecosystem interrelationships, climate impacts, ocean warming]
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'Doc Jim says:
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I like to think of it as species homogenization.
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