Based on Studies by Jane Lubchenco, What Influence Does the Population

question 10

Multiple Choice

Based on studies by Jane Lubchenco, what influence does the population density of the herbivorous intertidal snail, Littorina littorea, have on the number of algal species?

• A) As snail density increases from low to medium, the number of algal species increases.
• B) As snail density increases from medium to high, the number of algal species increases.
• C) As snail density increases from low to medium, the number of algal species decreases.
• D) As snail density increases from medium to high, the number of algal species decreases.
• E) Both as snail density increases from low to medium, the number of algal species increases and as snail density increases from medium to high, the number of algal species decreases.

---

Definitions:

Oceanic Trench

Deep, narrow depressions in the ocean floor, formed by the subduction of one tectonic plate beneath another.

Seismic-Reflection Profiling

A geophysical method for exploring Earth's subsurface by reflecting seismic waves off underground layers and interpreting the echoes received.

Sound Waves

Vibrations that travel through the air or another medium, perceivable as sounds when they reach a human or animal ear.

Continental Shelf

A submerged extension of a continent, ranging from the shoreline to a drop-off point known as the shelf break.