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View Diary: Overnight News Digest: Climate Change Edition (31 comments)

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  •  Climate is changing Lake Superior (12+ / 0-)

    Duluth News Tribune: Study of warming Lake Superior finds evidence of fish population changes

    Newly published research has found that Lake Superior's warming water is probably already affecting its most abundant big fish.

    [...]

    The research builds on work by Jay Austin and other researchers at the University of Minnesota Duluth's Large Lakes Observatory who found that average Lake Superior surface water temperatures increased 2.5 degrees Celsius between 1979 and 2006, among the most dramatic examples of climate change in North America.

    Since then, the rapid warming phenomenon has been found in other big lakes, including Lake Baikal in Russia. And ongoing research by the UMD crew appears to show it continuing since 2006; in August 2010, the average temperature taken at three Lake Superior buoys was the highest in the 31 years of records.

    "I think our biggest message is that these are changes that already have happened. These are not projections of temperatures years from now," said Tim Cline, an author of the study who is now at the School of Aquatic and Fishery Sciences at the University of Washington."We think Lake Superior deserves attention because these are some of the biggest temperature changes we've seen anywhere. We wanted to see how that may be already affecting the fish."

    •  What did it to the fish in the lakes? (2+ / 0-)
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      maggiejean, Magnifico

      I tried to scan the link and saw it's too complex for me to understand just scanning the article. Is there a loss in  certain species, who prefer cooler water, but a gain in those, who prefer warmer water? Does the loss and the gain balance each other out?

      •  Habitat study (1+ / 0-)
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        mimi

        The study, I think, looked at fish habitat range. Fish that preferred colder waters lost out to fish that preferred warmer waters. Lake Superior water is trending warmer, so cold water fish populations are predicted to be dropping.

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