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Measuring Species Diversity: Indices and Methods

Description: Measuring Species Diversity: Indices and Methods
Number of Questions: 14
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Tags: biodiversity ecology species diversity indices
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Which index measures the species richness and evenness of a community?

  1. Shannon-Wiener Index

  2. Simpson's Index

  3. Margalef's Index

  4. Berger-Parker Index


Correct Option: A
Explanation:

The Shannon-Wiener Index takes into account both the number of species and the relative abundance of each species in a community.

What is the formula for calculating the Simpson's Index?

  1. D = 1 - \sum_{i=1}^{S} p_i^2

  2. D = \sum_{i=1}^{S} p_i^2

  3. D = \frac{1}{\sum_{i=1}^{S} p_i^2}

  4. D = \frac{1}{S \sum_{i=1}^{S} p_i^2}


Correct Option: A
Explanation:

The Simpson's Index is calculated by summing the squared proportions of each species in the community and subtracting the result from 1.

Which index is commonly used to measure species richness?

  1. Shannon-Wiener Index

  2. Simpson's Index

  3. Margalef's Index

  4. Berger-Parker Index


Correct Option: C
Explanation:

Marglef's Index is calculated by dividing the number of species in a community by the natural logarithm of the total number of individuals in the community.

What is the formula for calculating the Berger-Parker Index?

  1. D = \frac{N_{max}}{N}

  2. D = \frac{N}{N_{max}}

  3. D = \frac{1}{N_{max}}

  4. D = \frac{1}{N}


Correct Option: A
Explanation:

The Berger-Parker Index is calculated by dividing the abundance of the most abundant species by the total abundance of all species in the community.

Which of the following is not a measure of species diversity?

  1. Species richness

  2. Species evenness

  3. Species composition

  4. Species abundance


Correct Option: D
Explanation:

Species abundance is not a measure of species diversity, but rather a measure of the relative abundance of each species in a community.

What is the difference between species richness and species evenness?

  1. Species richness is the number of species in a community, while species evenness is the relative abundance of each species.

  2. Species richness is the relative abundance of each species, while species evenness is the number of species in a community.

  3. Species richness is the number of individuals in a community, while species evenness is the relative abundance of each species.

  4. Species richness is the relative abundance of each species, while species evenness is the number of individuals in a community.


Correct Option: A
Explanation:

Species richness is a measure of the number of different species in a community, while species evenness is a measure of how evenly the individuals are distributed among the different species.

Which index is most sensitive to changes in the relative abundance of species?

  1. Shannon-Wiener Index

  2. Simpson's Index

  3. Margalef's Index

  4. Berger-Parker Index


Correct Option: A
Explanation:

The Shannon-Wiener Index is more sensitive to changes in the relative abundance of species because it takes into account the proportion of each species in the community.

Which index is most appropriate for comparing communities with different numbers of individuals?

  1. Shannon-Wiener Index

  2. Simpson's Index

  3. Margalef's Index

  4. Berger-Parker Index


Correct Option: A
Explanation:

The Shannon-Wiener Index is most appropriate for comparing communities with different numbers of individuals because it is not affected by the sample size.

Which index is most useful for identifying the dominant species in a community?

  1. Shannon-Wiener Index

  2. Simpson's Index

  3. Margalef's Index

  4. Berger-Parker Index


Correct Option: D
Explanation:

The Berger-Parker Index is most useful for identifying the dominant species in a community because it is calculated by dividing the abundance of the most abundant species by the total abundance of all species in the community.

Which of the following is not a factor that can affect species diversity?

  1. Habitat loss

  2. Climate change

  3. Pollution

  4. Competition


Correct Option: D
Explanation:

Competition is not a factor that can affect species diversity, but rather a factor that can affect the relative abundance of species within a community.

Which index is most commonly used to measure beta diversity?

  1. Shannon-Wiener Index

  2. Simpson's Index

  3. Margalef's Index

  4. Bray-Curtis Index


Correct Option: D
Explanation:

The Bray-Curtis Index is most commonly used to measure beta diversity, which is the difference in species composition between two communities.

What is the formula for calculating the Jaccard Index?

  1. J = \frac{C}{A + B - C}

  2. J = \frac{C}{A - B - C}

  3. J = \frac{C}{A + B + C}

  4. J = \frac{C}{A - B + C}


Correct Option: A
Explanation:

The Jaccard Index is calculated by dividing the number of species shared between two communities by the total number of species in both communities.

Which index is most appropriate for comparing communities with different numbers of species?

  1. Shannon-Wiener Index

  2. Simpson's Index

  3. Margalef's Index

  4. Chao's Index


Correct Option: D
Explanation:

Chao's Index is most appropriate for comparing communities with different numbers of species because it takes into account the number of species that are not sampled.

Which of the following is not a type of species diversity?

  1. Alpha diversity

  2. Beta diversity

  3. Gamma diversity

  4. Delta diversity


Correct Option: D
Explanation:

Delta diversity is not a type of species diversity, but rather a measure of the turnover rate of species between two communities.

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