Oil Spills, Eutrophication, and Shark Finning Exit Ticket

Question 1

We talked a lot about the Deepwater Horizon oil spill, and watched to documentary. What happened, and why was this oil spill so damaging?

Answer 1

The Deepwater Horizon oil spill happened in 2010 where an oil rig owned by the company BP exploded in the Gulf of Mexico. The explosion leaked for 87 days, and killed humans and was very damaging for the marine ecosystem.

Question 2

Why are sharks important to an ecosystem?

Answer 2

Some are the apex predators and some are the clean up crew of the ocean. This helps balance food webs and keep vital ocean habitats healthy.

Question 3

We watched a video about harmful algae blooms in Southern California. What was the main nutrient source for the HAB?

Answer 3

Excess phosphorus and Nitrogen

Question 4

In marine systems, which nutrient is typically the limiting factor?

Answer 4

Phosphorus

Question 5

How do harmful algal blooms (HABs) primarily affect marine ecosystems?

Answer 5

Produces dangerous toxins harmful to humans, marine life, and ecosystems.

Question 6

How many sharks are estimated to be killed each year?

Answer 6

Over 100 million