Biodiversity

Question 1

Biodiversity

Answer 1

The variety of living organisms in an area

Question 2

Population

Answer 2

Number of individuals of a particular species in a given area

Question 3

Community

Answer 3

Biotic (living) components in an ecosystem.
This will include multiple populations of different species eg all the different bacteria, animals and plants and fungi

Question 4

Habitat

Answer 4

The place where an organism lives

Question 5

Ecosystem

Answer 5

The community (all the different populations) and the abiotic non living environment eg the habitat (water cycle, co2, temperature)

Question 6

Ecosystem

Answer 6

The community (all the different populations) and the abiotic non living environment eg the habitat (water cycle, co2, temperature)

Question 7

Local biodiversity

Answer 7

Variety of living organisms in a small local habitat such as a forest

Question 8

Global biodiversity

Answer 8

Variety of species (living organisms) on earth

Question 9

Where is global biodiversity greatest ?

Answer 9

At the equator and decreases outwards

Question 10

Species richness

Answer 10

A simple measurement of the number of different species in a community: a headcount of the different species in this community

Question 11

Species evenness

Answer 11

The relative abundance of the different species in a community so the population sizes of each different species:
Eg relative to daisies, there are a lot more dandelions in this field. So not that even.

Question 12

Index of diversity

Answer 12

An equation used to measure biodiversity to take the richness of the different number of species and the evenness of these species into account

Question 13

Index of diversity calculation

Answer 13

Total number of organisms of all species x (Total number of organisms of all species-1)
Divided by
For every species added together , the number of organisms of that species x (the number of organisms of that species-1)

Question 14

2 measures to calculate index of diversity

Answer 14

Number of species in a community
Number of individuals of each species

Question 15

Higher value of diversity index

Answer 15

More diverse a community is

Question 16

Why is index of diversity more useful than species richness?

Answer 16

index of diversity takes into account population size of each species
So more accurately reflects how diverse habitat is: if there are much more of some species than others

Question 17

how to standardise samples taken for motile organisms

Answer 17

Samples taken at same time of day
Same size net/mesh used (insects)