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apologia marine biology mod 16

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    Effects of humans on the sea
  •   Study   Slideshow
  • Where are scientists finding "garbage islands"
    in the stable centers of gyres
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  • New costal areas a cleared and farmed. the run off has high concentrations of fertilizer. How will this indirectly affect a near by coral reef?
    it could cause an algal bloom which will block sunlight.
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  • What is coral bleaching?
    When the zooxanthellae leave coral
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  • What causes coral bleaching?
    most is caused by a temperature increase of 2 degrees F
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  • Can coral recover from bleaching or is it dead?
    zooxanthellae provide about 90% of a corals nutrition. they can survive and acquire another zooxanthellae
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  • Where can sludge be put, where it doesn't adversely affect the environment?
    In swamps or marshes where there is already bacteria breaking down organic material.
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  • Where does sludge come from?
    treated and filtered sewage
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  • What caused this? What should we do to prevent this in the future?
    the turtle got caught in a plastic ring when young. We can cut plastic rings that hold cans and bottles
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  • Why might marine biologist sink old cars on purpose?
    to create new reefs, a hard substrate for corals to grow on
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  • describe Biomagnification
    a small organism ingests a minute amount of toxin-many of these are eaten by a larger organism,increasing amounts in each trophic level
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  • What is bioaccumulation
    The accumulation of non biodegradable fat soluble substances in one organism
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  • What are fouling organisms?
    unwanted organisms that attach themselves to solid surfaces. causing negative effects
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  • Why is sanitizing sewage with chlorine bad?
    The chlorine is toxic to many kinds of marine life.
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  • What are some of the bad effects of a large oil spill?
    1. sea birds,2. filter feeding whales, 3. suffocating marine plants, 4.damage to airways of air breathing marine animals, 5. internal issues from ingesting.
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  • Is all the oil in the ocean caused by man?
    no seeps allow oil to get into marine waters.
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  • What happened to sea birds (brown pelican) that showed that DDT was detrimental to the environment?
    drastically reduced birth rate due to soft shells, and it interferes with reproductive enzymes.also effects the liver and nervous system
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