Marine Biology Lecture #12

Which of the following is the name of the kelp that is very common and highly productive?

• macrocystis

• microcystis

• sargassum

What percentage of carbon enters the food chain directly through consumption?

• 10%

• 90%

• 60%

• 30%

Kelp is primarily found in _ waters.

• warmer, temperate

• colder, temperate

• warmer, tropic

• cooler, tropic

Which of the following kelp beds are raised a few meters above the sea floor?

• stipitate

• prostrate

Which of the following kelp beds lie closely along the sea floor?

• stipitate

• prostrate

Which of the following is the difference between a kelp bed and a kelp forest?

• Kelp forest forms a surface canopy

• Kelp bed forms a surface canopy

Which of the following structures is the gas bladder of a kelp that helps keep it buoyant?

• pneumatocyst

• pneumatocyte

• stipe

• thallus

WHich of the following is true about the limitations to kelp distribution?

• limited to hard substrates

• limited to aphotic zone

• limited to temperate waters

Answer explanation

Kelps are limited to the photic zone, hard substrates, and temperate waters.

Which of the following is an example of a top-down process that will influence kelp forests?

• change in pH

• change in temperature

• change in light

• change in the amount of predators present in the area

Which of the following best describes the holdfast structure?

• they adhere the algae to the benthic zone

• they root the algae to the benthic zone