Biodiversity Concepts and Measurements

The video tutorial covers biodiversity, focusing on species richness and evenness. It explains how to measure these concepts within a habitat, using examples of a meadow and a wheat field. The tutorial also introduces Simpson's Index of Diversity as a method for measuring species evenness. The video concludes with exam tips, emphasizing the use of scientific terminology.

What is the focus of the OCR specification point C in the context of biodiversity?

• Species extinction

• Species migration

• Species richness and evenness

• Species adaptation

How is species richness defined?

• The number of individual organisms in a habitat

• The number of different species within a given area

• The number of ecosystems in a region

• The genetic diversity within a species

What does species evenness refer to?

• The total biomass of a habitat

• The genetic variation within a species

• The proportion of the community made up by each species

• The number of species in a habitat

In the context of species evenness, what does a high evenness indicate?

• There is a high number of species

• All species have similar abundance

• A few species dominate the habitat

• The habitat is dominated by a single species

Which habitat has higher species evenness: a meadow or a wheat field?

• Neither has evenness

• Wheat field

• Meadow

• Both have the same evenness

Why does the wheat field have low species evenness?

• It has equal numbers of all species

• It has fewer species than the meadow

• It is dominated by wheat, with few individuals of other species

• It has more species than the meadow

What is used to measure species evenness?

• Richness Index

• Shannon Index

• Biodiversity Index

• Simpson's Index of Diversity

What does Simpson's Index of Diversity take into account?

• The habitat size

• The number of individuals of each species

• The number of species only

• The genetic diversity of species

What should students avoid using in their exams according to the video?

• Diagrams

• Complex sentences

• The words 'it', 'they', 'amount', or 'size'

• Scientific terminology

What is the next lesson objective mentioned in the video?

• Habitat conservation

• Specification point D

• Genetic diversity

• Species adaptation