Population Growth (Chapter 2-1)

These flashcards cover key terminology regarding population dynamics, including growth rates, migration, and growth models as discussed by Mr. Calderon.

Population

A group of organisms that all belong to the same species and live in a given area.

Growth rate = 0

A state in which the population size is unchanged.

Growth rate > 0

A state in which the population size is growing.

Growth rate < 0

A state in which the population size is decreasing.

Immigration

The process of individuals moving into a population or arriving from elsewhere, causing the population to increase in size.

Emigration

The process of individuals moving out of or away from a population, causing the population to decrease in size.

Exponential Growth

A rapid increase in population that occurs when organisms are provided with ideal conditions for growth and reproduction and unlimited resources.

J-shaped curve

A graph representation of exponential growth characterized by constant growth rate and no limits on growth.

$$\text{G = rN}$$

The formula associated with the bacterial population growth model shown in the exponential growth chart.

Logistic Growth

A growth pattern that occurs when a population's growth slows and then stops, following a period of exponential growth.

Phase 1 (Logistic Growth)

The initial phase where a population begins to grow exponentially.

Phase 2 (Logistic Growth)

The phase in which the growth rate of the population slows down.

Phase 3 (Logistic Growth)

The phase in which growth levels out because the death rate equals the birthrate, resulting in a steady state.

Carrying Capacity

The maximum number of individuals of a particular species that a particular environment can support.

S-shaped curve

A graph representation of logistic growth characterized by a falling growth rate and limits on growth.