Biodiversity

Question 1

Three types of biodiversity

Answer 1

1. Habitat
2. Species
3. Genetic

Question 2

What is species evenness

Answer 2

How abundant each species is

Question 3

Biodiversity meaning

Answer 3

The number and variety of living organisms present in an area taking into account number of species, genetic diversity and range of habitats

Question 4

What is species richness

Answer 4

Number of different species present

Question 5

Why should we conserve different levels of biodiversity

Answer 5

1. Habitat ( more habitats, more species and niches)
2. Species ( extinction of one species could have effects and economic value)
3. Genetic ( more variation means a species is more likely to be able to evolve in climate change)

Question 6

Sampling techniques

Answer 6

Random and non random

Question 7

Random sampling

Answer 7

Advantage: data is not biased and representative of the whole area
Disadvantage: may not cover all areas of habitat and may underestimate biodiversity of rare species

Question 8

Non random sampling

Answer 8

Advantage: easier quicker
Disadvantages: data may be biased, overestimate of one species and inaccurate estimation of biodiversity

Question 9

Non random - stratified

Answer 9

Advantage- all areas are samples so less likely to be under represented
Disadvantage - lead to over representation of some areas

Question 10

Non random sampling systemic

Answer 10

Advantage - useful when habitat shows a clear change
Disadvantage- only species on transect are recorded and underestimates biodiversity