biodiversity within a community

Question 1

Define biodiversity

Answer 1

The variety of living organisms in an area

Question 2

Define habitat

Answer 2

The place where an organism lives

Question 3

Define community

Answer 3

All the populations of different species in a habitat

Question 4

Describe biodiversity in areas with lots of different species

Answer 4

Areas with lots of different species are high in biodiversity

Question 5

Define local biodiversity

Answer 5

The variety of different species living in a small habitat that’s local to you

Question 6

Define global biodiversity

Answer 6

Variety of species on Earth

Question 7

Where is biodiversity greatest on the Earth?

Answer 7

Near the equator

Question 8

Define species richness

Answer 8

A measure of the number of different species in a community

Question 9

How do you calculate species richness?

Answer 9

Taking random samples of a community and counting the number of different species

Question 10

What is species richness a measure of

Answer 10

Biodiversity

Question 11

What does the index of diversity calculate?

Answer 11

Measures biodiversity

Question 12

What does N stand for in the index of diversity formula

Answer 12

Total number of organisms of all species

Question 13

What does n stand for in the index of diversity formula

Answer 13

Total number of organisms of one species

Question 14

The higher the index of diversity the…

Answer 14

more diverse the are is

Question 15

List all the ways that agricultural practices reduce biodiversity

Answer 15

1. Woodland clearance
2. Hedgerow removal
3. Pesticides
4. Herbicides
5. Monoculture

Question 16

What is woodland clearance?

Answer 16

Increases area of farmland by cutting down trees

Question 17

Explain how woodland clearance decreases biodiversity

Answer 17

• It reduces the number of trees and the number of different tree species
• It destroys habitats so some species lose their shelter and food source
• Species will die or be forced to migrate to another area

Question 18

What is hedgerow removal?

Answer 18

Increases the area of farmland by turnings lots of small fields into fewer large fields

Question 19

Explain how hedgerow removal decreases biodiversity

Answer 19

• It reduces the number of trees and the number of different tree species
• It destroys habitats so some species lose their shelter and food source
• Species will die or be forced to migrate to another area

Question 20

What are pesticides

Answer 20

Chemicals that kill organisms that feed on crops

Question 21

Explain how pesticides decrease biodiversity

Answer 21

• This kills the pests, so it directly reduces biodiversity

- Any species that feed on the pests will lose a food source so their number can decrease too

Question 22

What are herbicides

Answer 22

Chemicals that kill unwanted plants

Question 23

Explain how herbicides decrease biodiversity

Answer 23

Kill unwanted plants and weeds reducing plant diversity and could reduce the number of organisms that feed on the weeds

Question 24

What is monoculture

Answer 24

When farmers have fields containing only one type of plant

Question 25

Explain how monoculture decreases biodiversity

Answer 25

A single type of plant reduces biodiversity directly and will support fewer organisms as a habitat or food source

Question 26

Describe the examples of how conservation schemes try to protect biodiversity

Answer 26

1. Giving legal protection to endangered species
2. Creating protected areas like sites of special scientific interest that restrict agricultural development
3. The environmental stewardship scheme which encourages farmers to conserve biodiversity by replanting hedgerows etc