APES Unit 3

Front

What are r-strategists?

Back

Organisms that typically live in unstable, unpredictable environments, reproduce rapidly (exponentially), do not take care of their young, and are subject to predation.

Front

What is biotic potential?

Back

The maximum capacity of an organism to reproduce under optimal environmental conditions.

Front

What does a Stage 4 Population Pyramid look like?

Back

Characterized by low birth and death rates, leading to a stable population with an aging demographic.

Front

What is Type II survivorship?

Back

A pattern of survival where there is a relatively constant decline in survivorship throughout most of the life span.

Front

What is the death rate in Stage 1 of demographic transition?

Back

High death rate due to disease, famine, and lack of medical care.

Front

What are k-strategists?

Back

Organisms that typically live in stable environments, invest significant time and resources in raising their young, and have lower reproductive rates.

Front

What is carrying capacity?

Back

The maximum population size that an environment can sustain indefinitely without degrading the environment.

Front

What is the difference between density-dependent and density-independent factors?

Back

Density-dependent factors are influenced by population density (e.g., competition, predation), while density-independent factors affect populations regardless of density (e.g., natural disasters).

Front

What is the demographic transition model?

Back

A model that describes the transition of a country from high birth and death rates to low birth and death rates as it develops economically.

Front

What is ecological succession?

Back

The process by which ecosystems change and develop over time, often following a disturbance.