Population Ecology Quiz
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Questions and Answers

Which pattern of population dispersion describes individuals clustered together?

  • Uniform
  • Random
  • Clumped (correct)
  • Scattered

Emigration refers to individuals moving into a population.

False (B)

What is the equation to calculate the growth rate of a population?

r = (b + i) - (d + e)

In Type III survivorship curves, there are __________ death rates and __________ survivorship rates in early life.

<p>high; low</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Habitat = The physical environment a species lives in Ecological Niche = The role a species plays in its ecosystem Competitive Exclusion = Two species cannot occupy the same niche for long Exponential Model = Population growth without limiting factors</p> Signup and view all the answers

What shape does the logistic growth model create?

<p>An S-shaped curve (C)</p> Signup and view all the answers

Exponential growth models show that populations are limited by resources.

<p>False (B)</p> Signup and view all the answers

What is carrying capacity?

<p>The maximum number of organisms of a certain species that an environment can support consistently.</p> Signup and view all the answers

Density-independent limiting factors include unusual weather, human activities, and __________.

<p>natural disasters</p> Signup and view all the answers

Match the following factors with their descriptions:

<p>Density-independent factors = Affect population growth regardless of density Density-dependent factors = Affect growth based on population density Exponential growth = Growth with unlimited resources Logistic growth = Growth that levels off at carrying capacity</p> Signup and view all the answers

Flashcards

Population Size

The number of individuals in a population.

Population Density

The average number of individuals per unit area or volume.

Population Dispersion

The pattern of distribution of individuals within a population.

Competitive Exclusion

The principle that two different species cannot occupy the same niche in the same place for long.

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Ecological Niche

The role a species plays in its ecosystem including all interactions with biotic and abiotic factors.

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Exponential Growth Model

A model that predicts unlimited population growth and results in a J-shaped curve.

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Logistic Growth Model

A model that predicts a period of slow growth followed by a rapid phase before stabilizing at a carrying capacity, resulting in an S-shaped curve.

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Carrying Capacity

The maximum population size that an environment can consistently support given available resources.

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Density-Independent Limiting Factors

Factors that affect a population's growth regardless of its density, such as natural disasters or climate change.

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Density-Dependent Limiting Factors

Factors that affect a population's growth based on its density, such as competition for resources or disease.

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