Simpson Index

Simpson's Index of Diversity

• quantitative measure that combines species richness and evenness in an ecological community.

• its a way to find standard deviation

• help us to fine average no of species.

• It encompasses the relationships between plants, animals, microorganisms, and their surrounding environment.

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NGSS.HS-LS2-2

Whilst planning a beaver reintroduction program, Mira and Emily were discussing how to measure the diversity of species in a local forest. What does Simpson's Index measure?

• Species richness and evenness

• Population growth rate

• Genetic variation

• Habitat size

Answer explanation

Simpson's Index measures biodiversity by assessing both species richness (the number of different species) and evenness (how evenly individuals are distributed among those species), making it the correct choice.

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NGSS.HS-LS2-2

Rosie and Daniel are studying the biodiversity of two different forests for The Woodland Trust. In one forest, they calculate a higher value of Simpson's Index. What does this indicate about the forest's biodiversity?

• Less diversity

• More diversity

• No change in diversity

• Decrease in population

Answer explanation

A higher value of Simpson's Index indicates more diversity within a community. It reflects a greater variety of species and a more balanced distribution of individuals among those species.

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NGSS.HS-LS2-2

What is the primary use of the Simpsons Index?

• To measure population density

• To calculate diversity in an area

• To monitor population growth

• To assess environmental impact

Answer explanation

The Simpsons Index is primarily used to calculate diversity in an area by considering both the number of species and their relative abundance, making it a key tool in ecology.

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NGSS.HS-LS2-2

What does the Simpson's Index measure in an ecological community?

• Species richness and evenness

• Population density

• Genetic diversity

• Habitat fragmentation

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NGSS.HS-LS2-2

In a study comparing two ecosystems, a higher Simpson's Index value was found in Ecosystem A compared to Ecosystem B. What does this imply about Ecosystem A?

• It has greater species diversity

• It has fewer species

• It has a larger population size

• It has more genetic variation

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NGSS.HS-LS2-2

Which of the following best describes the Simpson's Index of Diversity?

• A measure of species richness and evenness

• A calculation of genetic variation

• An assessment of habitat size

• A method to determine population growth

How is the Simpson's Index used in ecological studies?

• To quantify biodiversity

• To measure population density

• To assess genetic variation

• To calculate habitat size

Tags

NGSS.HS-LS2-2

What is the significance of a low Simpson's Index value in an ecosystem?

• Low species diversity

• High species diversity

• Stable population size

• High genetic variation

Tags

NGSS.HS-LS2-2

Which formula represents the Simpson's Index?