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Community Ecology Theories and Models

Description: Community Ecology Theories and Models Quiz
Number of Questions: 15
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Tags: ecology community ecology theories models
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Which theory proposes that the distribution and abundance of species within a community are determined by their interactions with each other and with the environment?

  1. Neutral theory

  2. Niche theory

  3. Island biogeography theory

  4. Metapopulation theory


Correct Option: B
Explanation:

The niche theory states that each species occupies a unique niche in the environment, defined by its specific requirements and interactions with other species.

According to the neutral theory, what is the primary driver of species abundance and distribution within a community?

  1. Competition

  2. Predation

  3. Random dispersal

  4. Environmental heterogeneity


Correct Option: C
Explanation:

The neutral theory proposes that species abundance and distribution are largely determined by random dispersal and colonization events, rather than by competitive interactions or environmental factors.

The species-area relationship describes the relationship between what two variables?

  1. Species richness and island size

  2. Species richness and latitude

  3. Species richness and elevation

  4. Species richness and temperature


Correct Option: A
Explanation:

The species-area relationship is a fundamental pattern in ecology that describes the positive correlation between the number of species found in a community and the area of that community.

Which theory predicts that the number of species that can coexist in a community is limited by the number of available resources?

  1. Competitive exclusion principle

  2. Resource partitioning theory

  3. Predation theory

  4. Mutualism theory


Correct Option: A
Explanation:

The competitive exclusion principle states that two species cannot coexist in a community if they compete for the same resources and have identical ecological niches.

What is the term for the process by which species evolve to reduce competition between them?

  1. Character displacement

  2. Resource partitioning

  3. Mutualism

  4. Predation


Correct Option: A
Explanation:

Character displacement is the process by which two species that compete for the same resources evolve different traits to reduce competition.

Which theory proposes that the distribution and abundance of species within a community are determined by their interactions with each other and with the environment?

  1. Neutral theory

  2. Niche theory

  3. Island biogeography theory

  4. Metapopulation theory


Correct Option: B
Explanation:

The niche theory states that each species occupies a unique niche in the environment, defined by its specific requirements and interactions with other species.

According to the neutral theory, what is the primary driver of species abundance and distribution within a community?

  1. Competition

  2. Predation

  3. Random dispersal

  4. Environmental heterogeneity


Correct Option: C
Explanation:

The neutral theory proposes that species abundance and distribution are largely determined by random dispersal and colonization events, rather than by competitive interactions or environmental factors.

The species-area relationship describes the relationship between what two variables?

  1. Species richness and island size

  2. Species richness and latitude

  3. Species richness and elevation

  4. Species richness and temperature


Correct Option: A
Explanation:

The species-area relationship is a fundamental pattern in ecology that describes the positive correlation between the number of species found in a community and the area of that community.

Which theory predicts that the number of species that can coexist in a community is limited by the number of available resources?

  1. Competitive exclusion principle

  2. Resource partitioning theory

  3. Predation theory

  4. Mutualism theory


Correct Option: A
Explanation:

The competitive exclusion principle states that two species cannot coexist in a community if they compete for the same resources and have identical ecological niches.

What is the term for the process by which species evolve to reduce competition between them?

  1. Character displacement

  2. Resource partitioning

  3. Mutualism

  4. Predation


Correct Option: A
Explanation:

Character displacement is the process by which two species that compete for the same resources evolve different traits to reduce competition.

Which theory proposes that the distribution and abundance of species within a community are determined by their interactions with each other and with the environment?

  1. Neutral theory

  2. Niche theory

  3. Island biogeography theory

  4. Metapopulation theory


Correct Option: B
Explanation:

The niche theory states that each species occupies a unique niche in the environment, defined by its specific requirements and interactions with other species.

According to the neutral theory, what is the primary driver of species abundance and distribution within a community?

  1. Competition

  2. Predation

  3. Random dispersal

  4. Environmental heterogeneity


Correct Option: C
Explanation:

The neutral theory proposes that species abundance and distribution are largely determined by random dispersal and colonization events, rather than by competitive interactions or environmental factors.

The species-area relationship describes the relationship between what two variables?

  1. Species richness and island size

  2. Species richness and latitude

  3. Species richness and elevation

  4. Species richness and temperature


Correct Option: A
Explanation:

The species-area relationship is a fundamental pattern in ecology that describes the positive correlation between the number of species found in a community and the area of that community.

Which theory predicts that the number of species that can coexist in a community is limited by the number of available resources?

  1. Competitive exclusion principle

  2. Resource partitioning theory

  3. Predation theory

  4. Mutualism theory


Correct Option: A
Explanation:

The competitive exclusion principle states that two species cannot coexist in a community if they compete for the same resources and have identical ecological niches.

What is the term for the process by which species evolve to reduce competition between them?

  1. Character displacement

  2. Resource partitioning

  3. Mutualism

  4. Predation


Correct Option: A
Explanation:

Character displacement is the process by which two species that compete for the same resources evolve different traits to reduce competition.

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