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One day in the Forest
People Everywhere
Using Each other
Vocabulary
100

All of the maple trees in a particular forest make up a...

What is population

100

This is the number of offspring produced in a population in a given period of time.

What is birth rate

100
This is a relationship between two species in which both species benefits:
What is mutualism
100

The movement of a species into a population

What is immigration

200

This is the largest population that an environment can support at any given time.

What is carrying capacity

200

After reaching carrying capacity, what does population size do over time? (Think of a graph.)

What is fluctuates around an average

200

In this relationship, one organism benefits and the other is neither helped nor harmed...

What is commensalism

200

A population that has a huge effect on the health and diversity of the entire ecosystem

What is keystone species

300

A term that describes the variation and variety of organisms that live within an ecosystem

Biodiversity

300

If emigration increases in a region, the population will ...

What is decrease

300

A remora fish feeding off the scraps from a shark's prey is an example of what symbiotic relationship?

What is commensalism

300

Living things like food sources and disease that impact the carrying capacity of a population

What is biotic factor

400

A winter storm could be an example of a(n) _____________ limiting factor.

What is abiotic

400
When birth rate = death rate in a region, the size of the population will _______ over time
What is "stay relatively constant"
400

A relationship between two species in which one species benefits and the other is gradually harmed.

What is parasitism

400

Molecules in earth's atmosphere like CO2 that trap and re-radiate heat, causing the earth to warm

What is greenhouse gases

500

A population is most likely to deplete the resources of its environment if the population goes beyond ...

What is carrying capacity

500

Term for population growth that increases dramatically when there are unlimited resources

What is exponential

500

This is a relationship between two species in which both species attempt to use the same limited resources; both are negatively affected by the relationship

What is competition

500

An area of land along a body of water where native plants grow; this area helps purify runoff, prevents soil erosion, and supports biodiversity

What is riparian zone