Give one direct effect and one indirect effect of dredging the entrance to a bay
Direct-tearing up the ecosystem of the floor of the ocean in the entrance, Indirect - cloudy water killing primary producers and clogging filter feeders
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15
What causes coral bleaching?
most is caused by a temperature increase of 2 degrees F
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What are fouling organisms?
unwanted organisms that attach themselves to solid surfaces. causing negative effects
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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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thief
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shark
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gift
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thief
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What is the technical term for excessive algal growth as a result of nutrient input?
Eutrophication
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baam
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fairy
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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 is bioaccumulation
The accumulation of non biodegradable fat soluble substances in one organism
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What do some unethical divers use cyanide and bleach for?
To stun and capture tropical fish, to sell to pet stores.
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shark
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Why should pregnant women and small children avoid sea food such as sharks, swordfish and king mackerel?
these fish are at the top of the trophic pyramid, they would have the highest concentration of mercury;.
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15
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 is sanitizing sewage with chlorine bad?
The chlorine is toxic to many kinds of marine life.