Simpson's Diversity Index

What is the formula to calculate Simpson's diversity index?

• D = 1 - ((n(n-1))/(N(N-1))^2

• SDI = 1 + Σ(n/N)^2

• SDI = 1 - Σn(n-1)/N(N-1)

• D = Σ(n/N)

How is the interpretation of Simpson's diversity index affected by its value?

• The interpretation is not affected by its value

• A higher value indicates lower diversity

• A lower value indicates higher diversity

• A higher value indicates a higher diversity

Compare and contrast Simpson's diversity index with Shannon's diversity index.

• Simpson's diversity index measures the probability that two individuals randomly selected from a sample will belong different species, while Shannon's diversity index takes into account both species richness and evenness in a community.

• Simpson's diversity index is used for measuring biodiversity in aquatic ecosystems, while Shannon's diversity index is used for terrestrial ecosystems.

• Simpson's diversity index is based on the number of species present, while Shannon's diversity index is based on the total biomass of the species.

• Simpson's diversity index measures the size of the population, while Shannon's diversity index measures the genetic variation within a population.

What are the limitations of using Simpson's diversity index to measure biodiversity?

• Simpson's diversity index is the most accurate measure of biodiversity

• Simpson's diversity index considers the evenness of species abundance

• Simpson's diversity index does not consider the evenness of species abundance and may not accurately represent the true diversity of an ecosystem.

• Simpson's diversity index is not affected by the number of species in an ecosystem

Calculate the Simpson's diversity index for a community with the following species: A-10, B-15, C-20, D-25, E-30.

• 0.76

• 0.33

• 1.2

• 2.5

Explain the significance of a high Simpson's diversity index value in a given ecosystem.

• A high Simpson's diversity index value indicates a high level of species diversity in the ecosystem, meaning there is a more even distribution of different species and a more stable ecosystem.

• A high Simpson's diversity index value indicates that the ecosystem is not sustainable and is likely to experience a decline in species population.

• A high Simpson's diversity index value indicates that the ecosystem is unhealthy and at risk of collapse due to an overabundance of certain species.

• A high Simpson's diversity index value indicates a low level of species diversity in the ecosystem, meaning there is a more uneven distribution of different species and a less stable ecosystem.

Discuss the implications of a low Simpson's diversity index value in a particular habitat.

• A low Simpson's diversity index value has no impact on the habitat

• A low Simpson's diversity index value in a habitat indicates low species diversity and a dominance of one or a few species. This can lead to reduced ecosystem stability, increased vulnerability to environmental changes, and potential loss of ecological functions.

• A low Simpson's diversity index value indicates high species diversity and a balanced ecosystem

• A low Simpson's diversity index value leads to increased ecosystem stability and resilience

How does Simpson's diversity index account for both species richness and evenness in a community?

• Simpson's diversity index does not take into account the relative abundance of different species

• Simpson's diversity index gives more weight to the abundance of rare species

• Simpson's diversity index only considers the number of different species in a community

• Simpson's diversity index gives more weight to the abundance of common species, reflecting both the number of different species and their relative abundance.

What are the potential biases that may arise when using Simpson's diversity index to compare different ecosystems?

• The color of the soil in the ecosystems

• The weather conditions in the ecosystems

• The distance of the ecosystems from the equator

• Some potential biases when using Simpson's diversity index to compare ecosystems include unequal sample sizes, differences in species abundance, and the sensitivity of the index to rare species.

Which site has greater relative species abundance

• Site A

• Site B