Ecological Succession on SS President Coolidge

The video discusses ecological succession in coral reefs, using the SS President Coolidge shipwreck as a case study. It explains how the shipwreck provides a timeline for observing ecological changes, starting with pioneer species like algae and soft corals. Over time, a complex food chain develops, including crustaceans, small fish, and larger predators. The presence of hard corals indicates the establishment of a climax community, signifying a stable ecosystem.

What event allowed scientists to study ecological succession on the SS President Coolidge?

• The ship sank after hitting a mine.

• It was a popular tourist site.

• The ship was intentionally sunk for research.

• It was a natural coral reef.

What was one of the first changes observed on the SS President Coolidge after it sank?

• The ship was covered in sand.

• The ship was moved by ocean currents.

• Seawater began corroding the metal.

• Fish immediately colonized the ship.

Which organisms are considered pioneer species on the SS President Coolidge?

• Sea turtles

• Hard corals

• Large fish

• Soft corals

What advantage did organisms that could quickly grow on the bare ship have?

• They could avoid predators.

• They could harvest plankton.

• They could move to other reefs.

• They could change the water temperature.

How do larger organisms contribute to the food chain on the SS President Coolidge?

• They produce oxygen for the ecosystem.

• They clean the shipwreck.

• They provide shelter for smaller species.

• They consume smaller creatures.

Which predators are mentioned as part of the ecosystem on the SS President Coolidge?

• Octopus and squid

• Grouper, barracuda, and shark

• Sea turtles and rays

• Dolphins and whales

Why are large predators often outnumbered by their prey in ecosystems?

• They reproduce more slowly.

• They require less food.

• They are less visible to prey.

• They reproduce more quickly.

What signifies the arrival of a climax community on the SS President Coolidge?

• The disappearance of predators

• The presence of hard corals

• The presence of soft corals

• The increase in water temperature

What does the presence of hard corals indicate about the reef ecosystem?

• It is still developing.

• It is unstable.

• It is well established.

• It is declining.

How long do hard corals typically take to grow and establish themselves?

• A few weeks

• Several days

• A few months

• Several years