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Thread: Invasive role in mass extinctions

  1. #1 Invasive role in mass extinctions 
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    "An influx of invasive species can stop the dominant natural process of new species formation and trigger mass extinction events, according to research results published Dec. 29 in the journal PLoS ONE.

    The study of the collapse of Earth's marine life 378 to 375 million years ago suggests that the planet's current ecosystems, which are struggling with biodiversity loss, could meet a similar fate."
    http://www.redorbit.com/news/science...ons/index.html

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    It's a study of past mass extinction events that concludes invasive species may have played a large role. The mechanisms aren't very obvious to me. The implication is the impact of todays wide variety of invasive species is added to the stress of habitat loss.


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  3. #2 Re: Invasive role in mass extinctions 
    Forum Ph.D. Dave Wilson's Avatar
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    Quote Originally Posted by Lynx_Fox
    "An influx of invasive species can stop the dominant natural process of new species formation and trigger mass extinction events, according to research results published Dec. 29 in the journal PLoS ONE.

    The study of the collapse of Earth's marine life 378 to 375 million years ago suggests that the planet's current ecosystems, which are struggling with biodiversity loss, could meet a similar fate."
    http://www.redorbit.com/news/science...ons/index.html

    --
    It's a study of past mass extinction events that concludes invasive species may have played a large role. The mechanisms aren't very obvious to me. The implication is the impact of todays wide variety of invasive species is added to the stress of habitat loss.
    I have taken this sentence from the above link. " In addition, the modern extinction rate exceeds the rate of ancient extinction events, including the event that wiped out the dinosaurs 65 million years ago "
    What is meant by modern ?


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    They mean right now.
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    Forum Ph.D. Dave Wilson's Avatar
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    From my previous post " In addition, the modern extinction rate exceeds the rate of ancient extinction events, including the event that wiped out the dinosaurs 65 million years ago " Is this statement meant to be alarmist ? i.e. modern extinction rate versus ancient extinction events.
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    I think it is meant to be objective. In terms of absolute species loss we appear to be in the midst of an event that would rank alongside the five big ones. I don't think it is alarmist when plummeting from a plane without a parachute to say 'Oh shit.'
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    Quote Originally Posted by Ophiolite
    I think it is meant to be objective. In terms of absolute species loss we appear to be in the midst of an event that would rank alongside the five big ones. I don't think it is alarmist when plummeting from a plane without a parachute to say 'Oh shit.'
    I have been doing some reading " Holocene extinction " I am starting to get some of the picture, but there is still a lot of reading to do.
    http://en.wikipedia.org/wiki/Holocene_extinction
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  8. #7 Re: Invasive role in mass extinctions 
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    Quote Originally Posted by Lynx_Fox
    An influx of invasive species can stop the dominant natural process of new species formation and trigger mass extinction events, according to research results published Dec. 29 in the journal PLoS ONE.
    “Invasive species” you mean like human beings? I think we qualify as the most invasive species ever and I think we are responsible the lions share of the extinctions going on in modern times. So what's the point of this link? To show there are other invasive species besides humans.
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  9. #8 Re: Invasive role in mass extinctions 
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    Quote Originally Posted by Lance Wenban
    Quote Originally Posted by Lynx_Fox
    An influx of invasive species can stop the dominant natural process of new species formation and trigger mass extinction events, according to research results published Dec. 29 in the journal PLoS ONE.
    “Invasive species” you mean like human beings? I think we qualify as the most invasive species ever and I think we are responsible the lions share of the extinctions going on in modern times. So what's the point of this link? To show there are other invasive species besides humans.
    That's beyond the scope of the studies in the article, though theres certainly quite a bit of evidence to suggest humans played a large role in disappearing mega-fauna as we made our way into North America and Australia.
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  10. #9 Re: Invasive role in mass extinctions 
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    Quote Originally Posted by Lynx_Fox
    Quote Originally Posted by Lance Wenban
    Quote Originally Posted by Lynx_Fox
    An influx of invasive species can stop the dominant natural process of new species formation and trigger mass extinction events, according to research results published Dec. 29 in the journal PLoS ONE.
    “Invasive species” you mean like human beings? I think we qualify as the most invasive species ever and I think we are responsible the lions share of the extinctions going on in modern times. So what's the point of this link? To show there are other invasive species besides humans.
    That's beyond the scope of the studies in the article, though theres certainly quite a bit of evidence to suggest humans played a large role in disappearing mega-fauna as we made our way into North America and Australia.
    Didn't you specify modern as meaning right now. I don't really think of 10 to 15,000 years ago as modern. It seems the article is blaming humans for introducing invasive species to local environments, without looking at humans as the main invasive species. But either way Earths biodiversity is in trouble, and yes I think we should do whatever we can to mitigate the problem.
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