2.7 - Biodiversity

Question 1

What is the capture-recapture technique?

Answer 1

• capturing a no of individuals and marking them
• releasing them back into the wild
• take another sample and estimate the population by equation

Question 2

What’s the equation to calculate the total population no?

Answer 2

N= mc \ r
M= number of marked on 1st visit
C= number of captured on 2nd visit
R= number of animals captured and marked on 2nd visit

Question 3

What is biodiversity?

Answer 3

The number of different species in a particular area

Question 4

What is an alien species?

Answer 4

An animal or plant that has been introduced into a country it does not originate from

Question 5

What are the problems with mark-release-recapture?

Answer 5

• won’t work for waterborne animals
• can’t wait for too long as population might change for birth and death
• have to mark without hurting organism

Question 6

Why is biodiversity important?

Answer 6

• food
• industrial materials
• new medicines

Question 7

What are the methods of protecting biodiversity?

Answer 7

• SSSI
• CITES
• Zoos
• National parks

Question 8

What are transects and what can they show?

Answer 8

• a series of quadrat samples taken in a line
• shows the frequency of a species
• distribution of species