4.2.1 Biodiversity

Question 1

What is biodiveristy

Answer 1

The range of habitats, the number of different species and their relative abundance and the genetic diversity within a species within and area

Question 2

What is sampling used for

Answer 2

To estimate the number of organisms in a given area (abundance)
And to measure a particular characteristic

Question 3

What are some non-random sampling

Answer 3

• opportunistic - uses organisms that are conveniently available
• stratified - populations divided into strata and then randomly sampled from
• systematic - carried out using a line or belt transect. Samples taken systematically

Question 4

What are the 5 sampling techniques for animals

Answer 4

• pooter - to suck up small invertebrates
• sweep net - to catch flying insects or insects that live on leaves
• pitfall trap - catch small crawling invertebrates
  Tree beating - catch invertebrates living in trees or bushes
• kick sampling - study organisms living in a river

Question 5

What are the two sampling techniques for plants

Answer 5

• line transect - organisms found at the regular sample points are recorded
• belt transect - quadrats are placed at regular sample points and the abundance of the organisms within each is recorded