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Iconic island study on its last legs

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Iconic island study on its last legs


Environmental | 206800 hits | Feb 12 8:17 am | Posted by: DrCaleb
19 Comment

Since 1958, ecologists have watched wolf and moose populations on Isle Royale in Lake Superior wax and wane in response to each other, disease and the weather. But for the longest predator–prey study in the world, the wolf is now at the door. Devastated b

Comments

  1. by avatar DrCaleb
    Wed Feb 12, 2014 4:20 pm
    Now that Lake Superior isn't freezing as often, the wolves don't have a chance to come in from the mainland and maintain the genetic diversity of the pack. If they die off, the moose will destroy the fir trees, and die off themselves.

  2. by Regina  Gold Member
    Wed Feb 12, 2014 4:35 pm
    Over the past 35 or so years I've been there a few dozen times and have never seen a wolf. I've heard them but that was about it. Have seen a few moose though. There has also been many years where there has been an ice bridge between Isle Royal and the Sibley Peninsula. Sometimes it is only there for days or a week depending on the winds which they don't mention in the article. It's not uncommon for the wind, depending on direction and speed to wipe out 6" of ice in hours. There may have been opportunity for more wolves to get there but the timing would have to be right for them, which apparently it hasn't been.

  3. by avatar DrCaleb
    Wed Feb 12, 2014 4:43 pm
    "Regina" said
    There may have been opportunity for more wolves to get there but the timing would have to be right for them, which apparently it hasn't been.


    It's an important place too, because we can study their habits of predator vs. prey in an environment reasonably free of other predators and prey. That'll let us know how best to conserve populations in other places; how many moose tags should be issued or whether to let a wolf population rise.

  4. by Regina  Gold Member
    Wed Feb 12, 2014 8:10 pm
    Very true. Almost wish they would introduce another male or female wolf. Although if at some point in the future there are a few new ones that make it there, it could start all over. Very minimal human impact as well. Not sure they have anyone at all there in the winter.

  5. by avatar BartSimpson  Gold Member
    Wed Feb 12, 2014 8:49 pm
    "DrCaleb" said
    Now that Lake Superior isn't freezing as often, the wolves don't have a chance to come in from the mainland and maintain the genetic diversity of the pack. If they die off, the moose will destroy the fir trees, and die off themselves.


    Funny you should say that at the same time it's in the news that Superior has record levels of ice coverage.

    http://www.foxnews.com/weather/2014/02/ ... n-decades/

  6. by Regina  Gold Member
    Wed Feb 12, 2014 9:45 pm
    About 5 years ago a friend of mine met two Americans on snow machines around the Sibley Peninsula (Sleeping Giant). They were from Houghton Michigan and snowmobile across Lake Superior from the Michigan UP to Isle Royal and then on to Canada. Quite dangerous if you ask me but I guess they made it.
    Lots of freezing is good for lake levels because it won't evaporate at the normal huge pace it does in winter.

  7. by avatar BartSimpson  Gold Member
    Wed Feb 12, 2014 10:30 pm
    "Regina" said
    About 5 years ago a friend of mine met two Americans on snow machines around the Sibley Peninsula (Sleeping Giant). They were from Houghton Michigan and snowmobile across Lake Superior from the Michigan UP to Isle Royal and then on to Canada. Quite dangerous if you ask me but I guess they made it.
    Lots of freezing is good for lake levels because it won't evaporate at the normal huge pace it does in winter.


    In the winter of 1976/1977 the ocean between Cape Cod and Nantucket froze over and my father drove our Ford Econoline over to the island to beat paying for the ferry crossing. He was one of several people who pulled this stunt.

    So to save maybe $15 on the ferry he ended up paying around $800 in fines and getting probation for reckless endangerment. And that was in 1976 dollars!

    Served him right, the cheap SOB. :wink:

  8. by Regina  Gold Member
    Thu Feb 13, 2014 2:50 am
    :lol:

  9. by avatar DrCaleb
    Thu Feb 13, 2014 2:31 pm
    "BartSimpson" said
    Now that Lake Superior isn't freezing as often, the wolves don't have a chance to come in from the mainland and maintain the genetic diversity of the pack. If they die off, the moose will destroy the fir trees, and die off themselves.


    Funny you should say that at the same time it's in the news that Superior has record levels of ice coverage.

    http://www.foxnews.com/weather/2014/02/ ... n-decades/

    Yep, first time since the 1970's. ('once' doesn't make a pattern ;) )

    The wolves need more than once since their great great grandfather's time in order to maintain genetic diversity on the island.

  10. by avatar BartSimpson  Gold Member
    Thu Feb 13, 2014 4:26 pm
    "DrCaleb" said
    Now that Lake Superior isn't freezing as often, the wolves don't have a chance to come in from the mainland and maintain the genetic diversity of the pack. If they die off, the moose will destroy the fir trees, and die off themselves.


    Funny you should say that at the same time it's in the news that Superior has record levels of ice coverage.

    http://www.foxnews.com/weather/2014/02/ ... n-decades/

    Yep, first time since the 1970's. ('once' doesn't make a pattern ;) )



    Once does not make a pattern but once is sufficient to disprove claims of any other pattern.

  11. by avatar andyt
    Thu Feb 13, 2014 4:32 pm
    Snort

  12. by avatar DrCaleb
    Thu Feb 13, 2014 4:53 pm
    "BartSimpson" said

    Once does not make a pattern but once is sufficient to disprove claims of any other pattern.


    Mmmmmm, no. 'One' is an anomaly in the data.



  13. by Regina  Gold Member
    Thu Feb 13, 2014 6:59 pm
    http://www.cbc.ca/news2/interactives/be ... index.html

    This is cool. You can sweep the map back and forth to see how the ice was last year on that day and the difference. Not a big surprise to us who live close to the lake this year to see the lake that frozen over.

  14. by avatar BartSimpson  Gold Member
    Thu Feb 13, 2014 7:15 pm
    "DrCaleb" said

    Once does not make a pattern but once is sufficient to disprove claims of any other pattern.


    Mmmmmm, no. 'One' is an anomaly in the data.

    Reminds me of a pretty accomplished jihadi who was credited with over thirty successful attacks.

    I shot him .

    It was sufficient to disprove his notions of a successful pattern.



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