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Thread: Cold empties Bolivian rivers of fish

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    Cold empties Bolivian rivers of fish

    With high Andean peaks and a humid tropical forest, Bolivia is a country of ecological extremes. But during the Southern Hemisphere's recent winter, unusually low temperatures in part of the country's tropical region hit freshwater species hard, killing an estimated 6 million fish and thousands of alligators, turtles and river dolphins.

    Scientists who have visited the affected rivers say the event is the biggest ecological disaster Bolivia has known, and, as an example of a sudden climatic change wreaking havoc on wildlife, it is unprecedented in recorded history.

    "There's just a huge number of dead fish," says Michel Jégu, a researcher from the Institute for Developmental Research in Marseilles, France, who is currently working at the Noel Kempff Mercado Natural History Museum in Santa Cruz, Bolivia. "In the rivers near Santa Cruz there's about 1,000 dead fish for every 100 metres of river."
    http://www.nature.com/news/2010/1008.../news.2010.437.

    I believe I mentioned another story like this earlier, from Peru.
    Climate, changes. It takes a particularly uneducated population to buy into the idea that it's their fault climate is changing and further political solutions can fix it.



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    Re: Cold empties Bolivian rivers of fish

    damn, that's really gonna bugger up the ecology there for a long time.
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    Re: Cold empties Bolivian rivers of fish

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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by ric27 View Post
    Page not found
    Cold empties Bolivian rivers of fish : Nature News
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    Re: Cold empties Bolivian rivers of fish

    more interested in if there has been rain to replenish the rivers and glaciers and ice packs.
    PeteEU

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    Re: Cold empties Bolivian rivers of fish

    That damn global warming!
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by MrVicchio View Post
    http://www.nature.com/news/2010/1008.../news.2010.437.

    I believe I mentioned another story like this earlier, from Peru.
    Wow, Vicchio actually posted a Global Warming story.

    There's hope for him, yet...

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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by spud_meister View Post
    damn, that's really gonna bugger up the ecology there for a long time.
    Depends on duration I'd guess. If it's followed by a warm snap the population could recover very quickly. Besides, that area of the globe is an ecological pendulum, it's extreme weather to begin with so people can expect this kind of hit to the wildlife routinely. Still, it's a pretty devastating event.
    Neither side in an argument can find the truth when both make an absolute claim on it.

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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by LaMidRighter View Post
    Depends on duration I'd guess. If it's followed by a warm snap the population could recover very quickly. Besides, that area of the globe is an ecological pendulum, it's extreme weather to begin with so people can expect this kind of hit to the wildlife routinely. Still, it's a pretty devastating event.
    that depends on many factors though, and due to the amount of dead fish, the predators could recover faster and send the ecosystem out of balance, or it could cause algae blooms which could kill the rivers, anything could happen, but according to the article, there could be more to this than just the cold.

    Because the deaths occurred mainly in rivers, Smolders suspects that they are linked to infection. "Some of the fish that I saw had white spots that may indicate disease. The cold probably made them very susceptible to all kinds of infections," he explains.
    Jégu has another hypothesis. He thinks that the burning of farmland around Santa Cruz, a regular part of the farming cycle locally, has occurred at particularly high levels this year. That might have been a contributing factor in the fish deaths, possibly because the smoke added to river pollution.
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    Re: Cold empties Bolivian rivers of fish

    Quote Originally Posted by spud_meister View Post
    that depends on many factors though, and due to the amount of dead fish, the predators could recover faster and send the ecosystem out of balance, or it could cause algae blooms which could kill the rivers, anything could happen, but according to the article, there could be more to this than just the cold.
    If it is a cold snap in a usually not cold area, that water flipping will definitely kill a ton of fish.

    I see it all the time around here with season change and private ponds.
    A cold snap, out of no where, will decimate a private stock pond.
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