Population Ecology
Communities
Ecosystems and Biogeochemical Cycles
Conservation Biology
MIXED
100

This type of population growth occurs when resources are unlimited.

What is exponential growth?

100

Relationship where both species benefit, one benefits/one is harmed, one benefits/one unaffected, or one eats another.

What are mutualism, parasitism, commensalism, and predation?

100

This process removes carbon dioxide from the air and stores it in organic matter.

What is photosynthesis?

100

This term describes a species at serious risk of extinction.

What is endangered?

100

This term describes when one species outcompetes and eliminates another.

What is competitive exclusion?

200

The maximum number of individuals an environment can support.

What is the carrying capacity?

200

This species has a major impact on its community and helps maintain structure.

What is a keystone species?

200

The percentage (about 10%) of production
transferred from one trophic level to the next.

What is trophic efficiency?

200

Long-term shifts in temperature and weather patterns


What is climate change?

200

These factors affect population size regardless of density.

What are density-independent factors?

300

This term describes factors that limit population size depending on density.

What are density-dependent factors?

300

This term refers to an organism’s role and position in the environment.

What is a niche?

300

Organisms that break down dead matter and recycle nutrients.

What are decomposers?

300

Three main levels of biodiversity

What are genetic, species, and ecosystem diversity?

300

In food chains, these organisms feed on primary consumers.

What are secondary consumers?

400

A graph that levels off at carrying capacity likely represents this growth type.

What is logistic growth?

400

This occurs when two or more species compete for limited resources.

What is interspecific competition?

400

Excess fertilizer can cause this oxygen-depleting event in aquatic ecosystems.

What is eutrophication?

400

A relatively small area with numerous endemic (found nowhere else) and many endangered and threatened species

What is a biodiversity hotspot?

400

The term for the number of different species in an ecosystem.

What is biodiversity?

500

The way individuals are spaced within their area.

What are dispersion patterns (clumped, uniform, random)?

500

A series of reciprocal evolutionary adaptations in two species

What is coevolution?

500

This process converts nitrogen gas (N₂) into ammonia (NH₃).

What is nitrogen fixation?

500

CO2, water vapor, and other greenhouse gases in the atmosphere are transparent to visible light, but intercept and absorb much of the infrared radiation Earth emits, re-reflecting some of it back toward Earth, retaining some of the solar heat.

What is the greenhouse effect?

500

The major factors driving increases in greenhouse gas concentrations.

What are burning fossil fuels and deforestation?