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Fish Rapidly Shifting Ranges following Rapid Temp Changes

Fish Rapidly Shifting Ranges following Rapid Temp Changes


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 09 November 2018

CLIMATE-CHANGING FISH

Fish Rapidly Shifting Ranges following Rapid Temp Changes

Warming waters caused rapid -- and opposite -- shifts in connected marine communities,
Cell Press, November 8. 2018.

MAIN POINTS

"Two connected marine ecosystems--the Eastern English Channel and Southern North Sea--experienced big and opposite changes in their fish communities over a 30-year period”

“Rapid warming drove smaller ocean fishes to shift abruptly northward from one ecosystem to the other."

Warming Disrupting Fishing Grounds
“...increase in the frequency and severity of climate oscillations and extreme warming events could trigger shifts in the distribution and abundance of species with profound consequences for the way ecosystems around the world function.”

"This warming caused an abrupt change in fish communities as small, rapidly maturing fishes, particularly pelagic fishes, simultaneously decreased in the English Channel and increased in the North Sea,."

Big Switch
"This suggests both that fishes shifted northward between the ecosystems and that the English Channel became an unfavorable environment for certain fishes while the North Sea became a more favorable environment."

Two Year Quick Big Switch
“While the researchers weren't surprised to find changes in species' abundances and distributions in response to human impacts and warming, they were surprised to find an inverse shift in entire fish communities within connected ecosystems. They were also surprised by the exceptional speed of those changes, as the "functional inversion" occurred only one or two years after a major temperature rise.”

Bigger Changes Coming
“The findings suggest that warming events in the future could have major and long-lasting impacts on marine ecosystems and fisheries.”

 

 

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