Exam 14: Predation and Herbivory

On Macquarie Island invasive rabbits were causing declines in palatable vegetation, and feral cats were preying on native birds. What was the primary result when a flea carrying a virus that killed the rabbits decreased rabbits' numbers on the island?

In Lotka-Volterra predator-prey models, prey populations decrease when

In Lotka-Volterra models of predator-prey interactions, c represents the

What is true about the Lotka-Volterra model for predator and prey?

In Lotka-Volterra models of predator-prey interactions, the growth rate of the predator population is represented by

Experiments with fences that exclude deer and other plant herbivores from grazing showed greater plant biomass in fenced areas than in unfenced control areas. The few plant species that remain in unfenced areas are those that

Reduced growth and development due to reduced feeding and foraging activity is a cost of

What is the driving force in the 10-year cycle of lynx and hare abundance?

Which would be considered a mesopredator?

Which is a warning coloration?

In Lotka-Volterra predator-prey models, the equilibrium isocline for prey is represented as

In rocky shore communities in which sea urchins lived among populations of brown algae and other species of algae, sea urchins were experimentally removed. What happened in response to sea urchin removal?

In experiments with the backswimmer (Notonecta glauca), a predatory insect, and two types of prey species, isopods (Asellus aquaticus) and mayflies (Coeon dipterum), predator preference seemed to be affected by the percentage of mayflies. What explains the results presented in the figure? What type of functional response is being demonstrated?

Many organisms that employ chemical defenses also display

Milkweeds use _____ as a chemical defense against herbivory.

The figure shows results of a study in which scientists observed the responses of tadpoles to a caged predator and an empty control cage in tubs of water. The caged predator emitted a chemical that alerted the tadpoles to its presence but was not able to kill tadpoles. Based on the figure, how did tadpoles respond to the experiment, and what type of defense did they exhibit?

Discuss the costs associated with defending against predation.

Wolves hunt in packs that chase down their prey. This is an example of

In Lotka-Volterra predator-prey models, predator populations decrease when

Predators that live in the Canadian tundra and feed on larger herbivores tend to have _____ population cycles, and predators that feed on smaller herbivores tend to have _____ population cycles.