Human Impact on Ocean Ecosystems

The largest source of pollution in the ocean comes from

• acid rain

• oil spills

• runoff

• wind

What is one way humans are trying to positively impact the ocean?

• Fishing

• Creating artificial reefs

• Harvesting oil and natural gas

• Transporting goods in ocean vessels

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If the acidity in the oceans keep increasing every year, which poses a greater threat to the ocean life?

• coral reefs - the acid eats away at the calcium carbonate that makes up the reef.

• algae - the acid makes it easier for the algae to grow.

• sea turtles - the acid strengthens their shells.

• kelp - the acid strengthens their ability to keep their roots attached.

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Is the following an example of a positive or negative impact on the earth's ocean systems?

• Positive Human Impact on Ocean Systems

• Negative Human Impacts on Ocean Systems

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Is the following an example of a positive or negative impact on the earth's ocean systems? Commercial fishing nets often times scrape the seafloor scooping up everything in its path. Dredge fishing destroys habitat and kills bycatch (fish, sharks, and other marine life caught unintentionally).

• Positive Human Impact on Ocean Systems

• Negative Human Impacts on Ocean Systems

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Is the following an example of a positive or negative impact on the earth's ocean systems? Fertilizers from farms runoff into rivers and create dead zones at the mouth of rivers in our world's oceans.

• Positive Human Impact on Ocean Systems

• Negative Human Impacts on Ocean Systems

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Is the following an example of a positive or negative impact on the earth's ocean systems? Fishing regulations create fishing seasons (time of year people are allowed to fish) to allow fish the opportunity to reproduce and increase species population.

• Positive Human Impact on Ocean Systems

• Negative Human Impacts on Ocean Systems

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What is the primary cause of ocean acidification?

• A) Increased levels of carbon dioxide in the atmosphere

• B) Oil spills

• C) Plastic pollution

• D) Overfishing

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Which of the following is a method used to mitigate the effects of ocean acidification?

• A) Reducing carbon emissions

• B) Increasing fishing quotas

• C) Expanding offshore drilling

• D) Building more dams

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What is the impact of plastic pollution on marine life?

• A) It provides shelter for small fish

• B) It is a source of food for marine animals

• C) It can lead to ingestion and entanglement, harming marine life

• D) It helps in coral reef formation

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