Exam 16: Competition

Researchers studying the effects of hay-scented fern on the recruitment of red maple and sugar maple expected to find that the fern employed interference competition on the tree seedlings by casting shade. What did researchers actually discover when they employed fences to exclude rodents?

When an individual drives down a resource to a point where another individual cannot persist, it is called

The mathematical models for competition between species are based on the _____ equation.

To use the Lotka-Volterra model for competition, which of the following information is NOT needed?

Describe the concept of Leibig's law of the minimum and how it relates to the reality of species requirements of multiple resources for population growth.

The resource requirements of two plant species, A and B, have been carefully studied. Researchers have determined the levels of a particular resource that will support equilibrium levels of each species. Species A needs more of this resource to maintain equilibrium than does species B. When these two species are set in competition (under conditions in which this resource is limiting), what is likely to happen to the populations of species A and B?

Intraspecific competition occurs

According to the competitive exclusion principle, two species limited by the same resource will _____.

In Lotka-Volterra competition models, the variable K represents the

In the logistic growth equation $\frac { d N } { d t } = r N \left( 1 - \frac { N } { K } \right)$ , the variable r represents the

Which of the following make(s) coexistence of species 1 and 2 more likely?

Scientists believe that some species of eucalyptus in Australia promote frequent fires by means of flammable oils in their leaf litter. These fires kill completing plants. What type of competition does this example describe?

Which is NOT a possible outcome of the Lotka-Volterra competition model between two species labelled x and y?

If a plant is primarily limited by nitrogen and secondarily by phosphorus, according to Leibig's law of the minimum, under which circumstances would adding phosphorus increase the plant's growth rate?

Connell's research on competition between the rock barnacle and Poli's stellate barnacle in upper and lower intertidal zones is an example of

Which of the following is NOT a renewable resource for a species of predatory bird?

Researchers have determined that common reed damages roots of other species by secreting gallic acid. This is an example of _____ competition.

In Connell's experiment with upper and lower intertidal barnacles, the rock barnacle excluded the Poli's stellate barnacle from deeper water because

Tansley's experiments with bedstraw (Galium) showed that when two closely related species of bedstraw are grown together,

Which of the following is NOT a renewable resource?