Biodiversity Flashcards

1
Q

Explain why destroying heathland to grow wheat would decrease animal biodiversity.

A

Reduction in the number of plant species
:Less VARIETY of food sources
Greater competition for resources
Fewer habitats

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What information is needed to calculate index of diversity for a community?

A

Total number of species present

Total number of each species

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is species richness?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is biodiversity?

A

The variety of living organisms in an area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which is a better indicator of biodiversity - index of diversity or species richness?

A

Index of diversity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Give 3 ways in which human activity can reduce biodiversity

A
Removing trees
Remove hedgerows
Use pesticides
Use herbicides
Monoculture
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a species?

A

A group of similar organisms that can reproduce and produce fertile offspring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How is the index of diversity calculated?

A
d = N (N-1)
     --------------
     Sum of (n)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Name the metal frame used when sampling an ecosystem

A

Quadrate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How can a random sample be achieved?

A

Place tape measures perpendicular to each other (to make the axes of a graph)
Use a random number generator to produce coordinates
Use the coordinates to place the quadrat down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is sampling?

A

Selecting a group of individuals to measure that will represent the whole target population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly