Exam 28: Community Interactions

What ecological process causes a lake to change into a marsh over a long period of time?

Two families of feral cats move into the same barn. One family preys on the mice; the other preys on the pigeons. This behavior is an example of

Intraspecific competition limits population size.

Fleas feed on the blood of dogs, cats, and people. What is this ecological relationship called?

Succession after a catastrophic disturbance such as a volcanic eruption is referred to as succession.

Parasites kill their hosts, but predators do not kill their prey.

The most common pioneer species are mosses and lichens.

Succession in small ponds and lakes is usually dependent on the input of from outside the ecosystem.

The keystone species in the African savanna is the elephant.

The caterpillar in the illustration displays

A certain species of animal represents just 3% of the biomass in its ecosystem. We might classify this as a keystone species if its removal

Startle coloration is used to attract mates.

In a mutualistic relationship, one species benefits and the other is harmed.

A keystone species is the most numerous species in an ecosystem.

If an insect eats the lettuce seedlings in your yard, it is acting most like a(n)

How might a predator use mimicry to its own advantage?

Why is the African elephant considered a keystone species?

A predator lures its prey nearby by looking like the prey's favorite food. This is referred to as .

The stable community that tends to persist in an area after succession is known as the community.

Woodpeckers and squirrels both nest in tree cavities. This is an example of interspecific competition.