Exam 13: Interspecific Competition

Preemptive competition occurs primarily among mobile organisms, such as small mammals.

In the experiments carried out by biologist David Tilman, two diatom species were able to coexist as long as silica was continually added to the water.

Competition has been regarded as a major force behind species divergence and specialization.

According to the Lotka-Volterra equations, there are two possible outcomes of interspecific competition.

Competition for one resource often influences the ability of an organism to access other resources.

Which of the following is a nonresource (or nonconsumable resource)that can influence the outcome of competition among plant species?

Because of competition, it is rare that a species is allowed to utilize its entire fundamental niche.

The competitive exclusion principle assumes that environmental conditions remain constant.

Which of the following is an assumption of the competitive exclusion principle?

A study which moves potential competitors in or out of sample plots is known as ________ experiments.

Which of the following statements is incorrect?

Because all plants require the same few resources (light, water, essential nutrients), resource partitioning is rarely observed for plants.

The limnologist G. E. Hutchinson proposed the idea of the niche as a multidimensional response called a(n)________.

In general, demonstrating the occurrence of competition under natural field conditions is problematic for all of the following reasons, EXCEPT that

Give an example showing how nonresource factors influence the outcome of competition.

In the Heller & Gates study on chipmunks in the Sierra Nevadas, when the least chipmunk was removed from its sagebrush habitat, the yellow-pine chipmunk did not experience competitive release. This is because the yellow-pine chipmunk had a ________ fundamental niche that ________ the sagebrush habitat.

The biologist Tilman used ________ to study competition between species.

The Lotka-Volterra competition models do not take into account variation between different environments.

The outcome of competitive interactions is determined solely by resource availability.

Encounter competition results from the behavioural exclusion of some individuals by others from a specific space that is defended.