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Theories and Models in Biogeography

Description: This quiz covers the various theories and models used in biogeography to explain the distribution of species and ecosystems across the globe.
Number of Questions: 15
Created by:
Tags: biogeography ecology evolution species distribution
Attempted 0/15 Correct 0 Score 0

Which theory proposes that the distribution of species is primarily determined by their ability to disperse and colonize new areas?

  1. Vicariance theory

  2. Dispersal theory

  3. Neutral theory

  4. Equilibrium theory


Correct Option: B
Explanation:

Dispersal theory emphasizes the role of dispersal and colonization in shaping species distributions, suggesting that species are more likely to be found in areas that are accessible and have suitable habitats.

According to the theory of island biogeography, what is the relationship between the size of an island and the number of species it can support?

  1. Positive correlation

  2. Negative correlation

  3. No correlation

  4. U-shaped relationship


Correct Option: A
Explanation:

The theory of island biogeography predicts a positive correlation between island size and species richness, meaning that larger islands tend to support a greater number of species due to increased habitat availability and reduced extinction risk.

Which model attempts to explain the distribution of species along an environmental gradient, such as a mountain slope?

  1. Species-area relationship

  2. Niche theory

  3. Neutral theory

  4. Habitat suitability model


Correct Option: D
Explanation:

Habitat suitability models aim to predict the distribution of species based on their environmental preferences and the availability of suitable habitats along an environmental gradient.

What is the central idea behind the theory of neutral theory of biodiversity?

  1. Species are distributed randomly across the landscape

  2. Species interactions play a major role in shaping species distributions

  3. Environmental factors determine the distribution of species

  4. Dispersal limitation is the primary driver of species distributions


Correct Option: A
Explanation:

The neutral theory of biodiversity proposes that species distributions are largely determined by stochastic processes, such as random dispersal and colonization, rather than by deterministic factors like environmental conditions or species interactions.

Which theory suggests that the distribution of species is primarily determined by their evolutionary history and the vicariance events that have occurred over time?

  1. Dispersal theory

  2. Vicariance theory

  3. Neutral theory

  4. Equilibrium theory


Correct Option: B
Explanation:

Vicariance theory emphasizes the role of geological and historical events, such as continental drift and the formation of land bridges, in shaping species distributions.

What is the main assumption of the equilibrium theory of island biogeography?

  1. Species immigration and extinction rates are equal

  2. Species immigration and extinction rates are independent of population size

  3. Species immigration and extinction rates are influenced by environmental factors

  4. Species immigration and extinction rates are affected by dispersal limitation


Correct Option: A
Explanation:

The equilibrium theory of island biogeography assumes that the number of species on an island reaches a steady state, where immigration and extinction rates are balanced.

Which model predicts that the distribution of species is determined by their ability to compete for resources and their tolerance to environmental conditions?

  1. Species-area relationship

  2. Niche theory

  3. Neutral theory

  4. Habitat suitability model


Correct Option: B
Explanation:

Niche theory proposes that species distributions are shaped by their ecological niches, which encompass their resource requirements, environmental tolerances, and interactions with other species.

What is the term used to describe the process by which species adapt to different environments and diverge into distinct populations or species?

  1. Speciation

  2. Dispersal

  3. Vicariance

  4. Adaptation


Correct Option: A
Explanation:

Speciation refers to the process by which new species arise from existing ones through evolutionary divergence and reproductive isolation.

Which theory proposes that the distribution of species is primarily determined by the availability of suitable habitats and the dispersal abilities of species?

  1. Vicariance theory

  2. Dispersal theory

  3. Neutral theory

  4. Equilibrium theory


Correct Option:
Explanation:

Habitat suitability theory emphasizes the importance of environmental factors and dispersal limitation in shaping species distributions.

What is the term used to describe the process by which species move from one area to another?

  1. Speciation

  2. Dispersal

  3. Vicariance

  4. Adaptation


Correct Option: B
Explanation:

Dispersal refers to the movement of individuals or populations from one area to another, which can occur through various mechanisms such as migration, flight, or seed dispersal.

Which theory proposes that the distribution of species is primarily determined by the interactions between species, such as competition and predation?

  1. Vicariance theory

  2. Dispersal theory

  3. Neutral theory

  4. Community assembly theory


Correct Option: D
Explanation:

Community assembly theory focuses on the interactions between species and how these interactions shape the composition and structure of ecological communities.

What is the term used to describe the process by which species become isolated from each other, leading to the formation of new species?

  1. Speciation

  2. Dispersal

  3. Vicariance

  4. Adaptation


Correct Option: C
Explanation:

Vicariance refers to the process by which populations of a species become geographically isolated from each other, often due to geological events or changes in the environment.

Which theory proposes that the distribution of species is primarily determined by the availability of resources and the competitive interactions between species?

  1. Vicariance theory

  2. Dispersal theory

  3. Neutral theory

  4. Resource competition theory


Correct Option: D
Explanation:

Resource competition theory emphasizes the role of competition for resources, such as food, water, and space, in shaping species distributions and community structure.

What is the term used to describe the process by which species adapt to their environment and become better suited to survive and reproduce in that environment?

  1. Speciation

  2. Dispersal

  3. Vicariance

  4. Adaptation


Correct Option: D
Explanation:

Adaptation refers to the process by which organisms evolve traits that enhance their survival and reproductive success in a particular environment.

Which theory proposes that the distribution of species is primarily determined by the availability of suitable habitats and the dispersal abilities of species?

  1. Vicariance theory

  2. Dispersal theory

  3. Neutral theory

  4. Habitat suitability theory


Correct Option: D
Explanation:

Habitat suitability theory emphasizes the importance of environmental factors and dispersal limitation in shaping species distributions.

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