Biodiversity Measurement Concepts

This video tutorial by David explains how to use the Simpson's Index of Diversity to measure biodiversity in habitats. It covers the concepts of species richness and evenness, and how they contribute to biodiversity. The video provides a step-by-step guide to calculating the Simpson's Index and interpreting its values, highlighting the importance of both richness and evenness in determining the diversity of a habitat. The tutorial concludes with a discussion on the implications of high and low species diversity for ecosystem stability.

What are the two main factors considered when measuring biodiversity?

• Species richness and species evenness

• Species variety and species habitat

• Species abundance and species distribution

• Species count and species density

How is species richness defined?

• The number of individuals in a species

• The number of species present in a place

• The genetic variation within a species

• The distribution of species in a habitat

What does species evenness measure?

• The total number of species in a habitat

• The relative abundance of different species

• The genetic diversity within a species

• The number of habitats in an ecosystem

Why is it difficult to judge diversity by just looking at numbers?

• Because numbers do not account for species richness

• Because numbers do not account for species evenness

• Because numbers do not provide a numerical value

• Because numbers do not reflect species interactions

What does Simpson's Index of Diversity quantify?

• The ecological niche of a species

• The genetic diversity of a species

• The biodiversity of a habitat

• The population size of a species

In the formula for Simpson's Index, what does the capital 'N' represent?

• The number of species

• The total population size

• The number of habitats

• The number of ecological niches

What does a Simpson's Index value closer to 1 indicate?

• Low diversity

• No diversity

• Moderate diversity

• Infinite diversity

What does high species diversity suggest about a habitat?

• It has fewer ecological niches

• It is a hostile environment

• It is a more stable ecosystem

• It has simple food webs

What is a characteristic of a habitat with low species diversity?

• Few well-adapted organisms

• Many ecological niches

• Stable ecosystem

• Complex food webs

How does a low species diversity affect an ecosystem?

• It makes the ecosystem more resilient to changes

• It increases the number of ecological niches

• It makes the ecosystem more vulnerable to changes

• It leads to more complex food webs