Exam 55: Community Ecology

The actual niche the organism is able to occupy in the presence of competitors is called its

Resource partitioning can often be seen in similar species that occupy the same geographic area.These species avoid competition by living in different portions of the habitat or by utilizing different food or other resources and are called ________ species.

Which of the following statements accurately reflects the differences between Batesian mimicry and Müllerian mimicry?

When there are high levels of disturbance in a community,the number of K-selected species should increase along with the overall diversity of the community.

In India,golden jackals that have been expelled from their pack have been known to attach themselves to a particular tiger,trailing it at a safe distance in order to feed on the big cat's kills.What type of relationship exists between the jackal and the tiger?

Two organisms trying to utilize the same resource is called

Which of the following would be an expected long-term change during primary succession on glacial moraines? Check all that apply.

Which of the following statements about predation are true? Check all that apply.

Competition between species is called ________ competition.

Two species of warblers colonize the same island habitat.Both species nest in similar locations and eat the same type of prey.Eventually,competition will probably cause one species to

Which statement is an accurate interpretation of the outcome in an ecosystem when a major predator is removed?

Garlic mustard is an invasive plant species in North American temperate forests.Garlic mustard secretes an allelochemical that interferes with relationships between native tree roots and their mycorrhizal fungi.This would be an example of

Which of the following factors could be important in determining a species' fundamental niche? Check all that apply.

Communities with a high level of bacterial diversity are found in many habitats including soil and aquatic environments.Recent studies indicate this diversity is crucial to the functioning of these communities.The same studies have also found that phage abundance plays a critical role in the maintenance of the bacterial diversity within these communities.Are phages a density-dependent or a density-independent regulating factor?

In which habitat would you expect to encounter community assemblages that are most similar?

During the mid 1930s,G.F.Gause studied competition among three species of Paramecium.Through his experiments he formulated a principle of

Cattle egrets follow African ungulates such as African buffalo around and catch insects that the buffalo flush out.Oxpeckers perch on the backs of buffalo and feed on ectoparasites that infest the buffalo.Which one of the following shows the ecological interaction that the buffalo has with each bird?

Aposematic,or warning coloration,serves to protect an animal or plant by signaling to potential ________ to stay away.

Which of the following statements about the intermediate disturbance hypothesis are true? Check all that apply.