Community Ecology Review

The ecological role an organism performs in their specific environment is considered the organism's...

• Habitat

• Population

• Biome

• Niche

a relationship between two different species in which both species compete for limited resources

• Symbiosis

• interspecific competition

• species richness

• species-area effect

A relationship in which two different organisms live in close association with each other

• interspecific competition

• Mutualism

• Symbiosis

• Commensalism

the division of resources that enables similar species to coexist in a community

• character displacement

• climax community

• resource partitioning

• pioneer species

The ecological niches of three bird species are shown in the diagram. What is the advantage of each bird species having a different niche?

• As more birds feed higher in the tree, available energy increases.
• More abiotic resources are available for each bird.
• Predators are less likely to feed on birds in a variety of locations.
• There is less competition for food.

When put together, one organism outcompetes the other for resources.  This is an example of:

• competitive exclusion principle
• speciation
• biological niche
• evolution

When predation occurs, it is common to see trends in the population size over time. The graph is an example. What is shown in the graph?

• a population cycle

• competition for resources

• mutualism

• commensalism

commensalism is when

• both organisms are positively impacted

• one organism is positively impacted and the other is harmed

• one organism is positively impacted and the other is unaffected

• both organisms are negatively impacted

mutualism is when

• both organisms are positively impacted

• one organism is positively impacted and the other is harmed

• one organism is positively impacted and the other is unaffected

• both organisms are negatively impacted

The process by which two species change as a response to changes in each other.

• tolerance

• predation

• coevolution

• niche