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    Can algae respire?
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    I'm doing a question on explaining how a change in environmental factors could account for the sudden rise & fall of population of algae between May & September as shown by the graph.
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    (Original post by suzanna_xx)
    Can algae respire?
    All living things respire.

    http://www.nature.com/nature/journal...2151038a0.html
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    The fact that algae respire is the main cause of eutrophication. But all living things respire so yes.
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    Algae is a unicellular/multicellular organism, so it's living. Thus it respires. Correct?
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    It's alive so it respires.
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    (Original post by Andy1080)
    The fact that algae respire is the main cause of eutrophication. But all living things respire so yes.
    I thought it was the algal bloom, which blocks the sunlight to plants on the water-bed, which ceases photosynthesis in them, causing them to die and be decomposed by bacteria which respire aerobically, that is the main cause of eutrophication.
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    I hope you're not studying biology :p:
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    (Original post by scott8anthony)
    I thought it was the algal bloom, which blocks the sunlight to plants on the water-bed, which ceases photosynthesis in them, causing them to die and be decomposed by bacteria which respire aerobically, that is the main cause of eutrophication.
    Yeah, I think you're right. Long time since I've done any biology :/
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    (Original post by suzanna_xx)
    Can algae respire?
    http://www.environmentalleverage.com...0Solutions.htm
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    (Original post by scott8anthony)
    I thought it was the algal bloom, which blocks the sunlight to plants on the water-bed, which ceases photosynthesis in them, causing them to die and be decomposed by bacteria which respire aerobically, that is the main cause of eutrophication.
    Addition:
    Because of increased pollution & overuse of fertilisers, algae & bacteria thrive which causes the death of organisms beneath them: e.g. fishes etc.
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    I though for Eutrophication the fertiliser causes rapid growth in the water plants. This results in more oxygen being required for respiration and therefore the water become stale and animal life begins to find it difficult to breathe.
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    (Original post by DeeDub)
    I though for Eutrophication the fertiliser causes rapid growth in the water plants. This results in more oxygen being required for respiration and therefore the water become stale and animal life begins to find it difficult to breathe.
    Mmmmm... I kinda think this too.
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    (Original post by suzanna_xx)
    Mmmmm... I kinda think this too.
    Eutrophication is caused by excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.

    BUT you can get eutrophication without fertilisers being involved.
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    (Original post by suzanna_xx)
    That's not correct.

    Because of increased pollution & overuse of fertilisers, algae & bacteria thrive which causes the death of organisms beneath them: e.g. fishes etc.
    How was what he said incorrect?

    The algae does block sunlight, which prevents respiration of algae/other plants below and causes them to die. Bacteria then breaks down the dead matter, taking oxygen from the river. The fish do not have sufficient oxygen and die.

    You've missed out crucial stages in your explanation, which are:
    a) Lack of sunlight killing the plants below
    b) Bacteria using oxygen which the fish require to survive.
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    (Original post by addylad)
    How was what he said incorrect?

    The algae does block sunlight, which prevents respiration of algae/other plants below and causes them to die. Bacteria then breaks down the dead matter, taking oxygen from the river. The fish do not have sufficient oxygen and die.

    You've missed out crucial stages in your explanation, which are:
    a) Lack of sunlight killing the plants below
    b) Bacteria using oxygen which the fish require to survive.
    :top:
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    (Original post by addylad)
    How was what he said incorrect?

    The algae does block sunlight, which prevents respiration of algae/other plants below and causes them to die. Bacteria then breaks down the dead matter, taking oxygen from the river. The fish do not have sufficient oxygen and die.

    You've missed out crucial stages in your explanation, which are:
    a) Lack of sunlight killing the plants below
    b) Bacteria using oxygen which the fish require to survive.

    I agree with you. The OP was wrong to say your explanation was incorrect.

    I would add however, that eutrification can occur even when fertilisers are absent.
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    (Original post by steve2005)
    I agree with you. The OP was wrong to say your explanation was incorrect.

    I would add however, that eutrification can occur even when fertilisers are absent.
    :yep:
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    Yeah I would think so since all living things respire and algae is a living thing
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    yes.
 
 
 
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