Biodiversity

Question 1

Why is low genetic biodiversity bad?
(ONLY NEED 2)

Answer 1

Less likely species will adapt if there is a change in enviornment
If it is low, interbreeding may occur
It is harder to find a mate
More vunerable to predators

Question 2

Why may there be a decrease in the n. of species

Answer 2

New Predators
Competition for Food

Question 3

What is a pitfall trap

Answer 3

DIG hole and place container in soil
Make top of container level with soil level
Cover to protect from rain
Count invertebraes and sample both areas

Question 4

Why may polymorphisms not be supposrted

Answer 4

Polymorphisms similar
May not have sampled same loci
No statistical tests performed

Question 5

Whta happenes if bidodiversity is low

Answer 5

Small gene pool which leads to low genetic diversity
Proportion of polymorphic loci is small
Loss of alleles - interbreeding occurs

Question 6

What is species rich and eveness

Answer 6

Species RICH -> N. of species present within an ecosystem
Species EVENESS -> Abudnance of species present

Question 7

What is the purpose of:
Constructed Dams
Felled Trees
Built Lodge
to increase habitat diversity

Answer 7

Constructed Dams -> Reduces flow rate downstreams to allow still moving water for aquatic species

Felled Trees -> Opened tree Canopy to allow light to ground level

Built Lodge -> Creates shelter habitiat for insect species

Question 8

How may: Human Pop. Agriculture and Climate change reduce biodiversity

Answer 8

Human Pop:
Destroys habitat (Reduces food resources)
More waste is produced
Need for more agricultural land - (deforestation)

Agriculture:
Pesiticde use - contaminates surrounding soil and wwater sources
Reduced genetic diversity
Use of fertiliser ( INCREASED COMP. FOR SUNLIGHT)

Climate Change
Drier climates
Warmer species not adapted
Migration not possible

Question 9

Why would n. of spcies reduce because of low species diversity

Answer 9

one less species hence reduces species richness and if species was domiannt, this increases species eveness. Former prey may return

Question 10

What is the importance for maintaining biodiversiy for discovery of new antibiotics

Answer 10

Many drugs found in microbes -> Maintaining biodiversity increases chance of developing new drugs
Once species ectinct they are gone forever

Question 11

What are the reasosn for maintainig biodiversity

Answer 11

Ecological
Economic
Aesthetic