Exam 54: Community Ecology

According to bottom-up and top-down control models of community organization,which of the following expressions would imply that an increase in the size of a carnivore (C)population would negatively impact on its prey (P)population,but not vice versa?

Of the following zoonotic diseases,which is most likely to be studied by a community ecologist?

According to the equilibrium model of island biogeography,species richness would be greatest on an island that is

Prairie dogs once covered the expanses of the Great Plains.Their grazing made the grass more nutritious for the huge herds of bison,and they were preyed upon by a variety of snakes,raptors,and mammals.In fact,the black-footed ferret (now endangered)specialized in prairie dog predation.Today,increases in housing and agricultural developments have eradicated many prairie dog towns.Which of the following statements about prairie dogs is true?

In a two-week marketing analysis,McDonald's was interested in finding out the popularity of the Big Mac.Using the realized/fundamental niche concept of community ecology,what should the marketing researchers do?

Which of the following is the most accepted hypothesis as to why invasive species take over communities into which they have been introduced?

Imagine five forest communities,each with 100 individuals distributed among four different tree species (W,X,Y,and Z).Which forest community would be most diverse?

The next series of questions presumes that you have at least once visited and have some knowledge of the fast-food restaurant McDonald's.Use your knowledge of McDonald's and your understanding of community ecology to answer the following questions about an ecological community,McDonaldland. -Which two "species" are likely to compete for the same ecological niche?

Resource partitioning would be most likely to occur between

Use the following diagram of five islands formed at around the same time near a particular mainland,as well as MacArthur and Wilson's island biogeography principles,to answer the following questions. -Which island would likely exhibit the most impoverished species diversity?

The principle of competitive exclusion states that

Keystone predators can maintain species diversity in a community if they

Connell conducted this experiment to learn more about

The oak tree pathogen,Phytophthora ramorum,has migrated 650 km in 10 years.West Nile virus spread from New York State to 46 other states in 5 years.The difference in the rate of spread is probably related to

During the course of the formation of a parasite/host relationship,a critical first step in this evolution would be

The plague bacterium Yersinia pestis,is well-known for the high death toll it caused in Europe during the Middle Ages.Upon introduction to North America,this disease

What is the main advantage of controlled burnings of forested areas? Controlled burnings ________.

Evidence shows that some grasses benefit from being grazed.Which of the following terms would best describe this plant-herbivore interaction?

What interactions exist between acacia trees in South America and stinging ants?

Based on the intermediate disturbance hypothesis,a community's species diversity is increased by