Tuesday, September 21, 2010

Massive Fish Kill in Gulf Caused by "Dead Zone," Oil?


Summary
Thousands of fish died belly-up in a marsh in Louisiana. No one really knows what the main reason why the fish died and they don’t know if it was just everything conspirering against the fish because fish decompose so fast that it's hard to get a fresh enough sample. Kevin Kleinow, a LSU fish toxicologist, said"Very surprised if someone was able to definitely determine the cause of death" for these fish”. Some theories of the fish death is that the agricultural runoff that goes into the Mississippi River contains nutrients that help the growth of an algae bloom that is oxygen-hungry. As the algae oxygen level goes down, the fish will choke. Anouther reason of the death of the fish can be the oil spill in the Gulf of Mexico. This is causing a serge of oil-eating bacteria that take up oxygen. This expands the low oxygen dead zones. The last fish died at the time of the year when dead zones expands.
Opinion / Reflection
I was surprised about the death of all of the fish and that they will wash up on shore. One this will have a huge affect on an already messed-up ecosystem. Also this will make it harder to fish in areas where the fish are dying by the thousands.

Questions
1. How many fish died?

2. What is one way that could have had been the main reason the fish died?

3. why is it hard to get a fresh sample of a fish?


http://news.nationalgeographic.com/news/2010/09/100916-fish-kill-louisiana-gulf-oil-spill-dead-zone-science-environment/

4 comments:

  1. this could possibly be a controversial topic, I mean, is there a way to actually find out? Because id this isn't because of the oil spill, then BP will just be blamed for one more thing that they did. But then again, if it was their fault, it should be on their shoulders. I'm not sure what I would do if I were in their position.

    1) Thousands
    2) Because of the bacteria that eats the oil is taking up more oxygen
    3) Because the decomposition of the fish is so fast

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  2. This did not take me as surprised, because I figured, sooner or later, many fish would suffer because of the oil "consuming" the oxygen, no longer allowing them to get air. I believe that this is another issue caused because of BP.
    ANSWERS:
    1. Thousands of fish.
    2. The bacteria in the oil consumes the oxgem, making the fish suffocate.
    3. Because fish decompose very quicly, so it is hard for scientists to obtain a fresh sample.

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  3. Like Briana this is a very hard topic to say what the cause was. I think this could have happend from the oil spill because the golf is touching up on Lousianna. It also could have been this algea that are consuming the oxgen which could be possible to. I thikn its pretty amazing that they haven't found out what happened. If they can find how a person died wouldn't they be able to find out how these fish died?

    1. Thousands of Fish.
    2. Algea that has been getting nutrients from the Mississippi River, and is sucking up the oxegen in the water.
    3. Because the fish have decomposed so fast.

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  4. Aww! Its so sad that all of these fish are dying. I agree with Brianna, maybe it was the oil that killed all of the fish. i don't think that people realize, since all of these fish are dying, seafood prices will get higher. they need to find out what killed all of these fish fast, that way more fish won't die.

    Answers-
    1. Thousands of fish
    2.The bacteria in the oil has been taking in the oxygen making it hard for the fish to breathe
    3. The fish ar decomposing extremely fast

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