10.2 Diversity within a community

Question 1

Definition of biodiversity
What are its 3 components

Answer 1

Number and variety of living organisms in a particular area

Made up of…
- Species diversity
- Genetic diversity
- Ecosystem diversity

Question 2

What is species diversity

Answer 2

Refers to number of different species and number of individuals of each species within a community

Question 3

What is genetic diversity

Answer 3

variety of genes possessed by the individuals that make up a population of a species

Question 4

What is ecosystem diversity

Answer 4

Range of different habitats, eg from a small local habitat to the whole earth

Question 5

What is species richness

Answer 5

The number of different species in a particular area at a given time.

It doesn’t take into account the number of individuals in each species however

Question 6

What is the equation for measuring species diversity

The higher the value of d, the more diverse the species is

Answer 6

d = N(N-1) / ∑n(n-1)

So N is total number of organisms of all species
And n is total number of organisms of each species

∑ is the sum of members of individual species

Question 7

what is the difference between species richness and the diversity index

Answer 7

The diversity index takes into account the numbers of individuals in each species, whilst species richness only takes into account the number of different species in the area

Question 8

What is a community

Answer 8

All the different species that live in an area and interact with eachother