Human Impacts on Coral Reefs

How are CO₂ emissions hurting coral reefs?

• raising ocean temperatures

• ocean acidification

• lowering dissolved oxygen content in water

• all of the above

What is coral bleaching?

• corals expelling all of their zooxanthellae

• predators eating corals down to their skeleton

• corals becoming paler due to sickness

• none of the above

Ocean acidification makes it harder for corals to make and repair their skeletons

• True

• False

Why does coral bleaching happen?

• corals are growing old and dying

• high stress levels

• it is too hard to maintain both themselves and their zooxanthellae

• the zooxanthellae are rebelling

What is most likely to happen when to corals after they bleach?

• they die of starvation

• they immediately take in new zooxanthellae

• they wait for a while then take in new zooxanthellae

• they become self-sufficient

Are recreational divers good or bad for corals?

• Good, they help maintain corals

• Bad, they poison corals

• Good, they scare away predators that eat the corals

• Bad, they unintentionally damage corals by thoughing them with their gear

What ingredient in sunscreen is the most damaging to corals?

• zinc oxide

• titanium dioxide

• oxybenzone

• avobenzone

What terminology is used to describe human impacts on nature?

• naturogenic

• anthropogenic

• parasitic

• hegemonic

What is the most common cause of coral death

• boat damage

• scuba divers

• global warming

• plastic

What are some of the indirect impacts of climate change on coral reefs?

• disease

• invasives

• algae blooms

• all of the above