Biodiversity

Question 1

What is the definition of Biodiversity?

Answer 1

The variety of different organism found in a particular area

Question 2

What is species richness and evenness?

Answer 2

Richness - The no’ of dif species
Evenness - The relative abundance of each speices

Question 3

What are the 4 techniques to acquire a representative estimate of biodiversity? (sampling)

Answer 3

Quadrat - key+ count % cover
Pitfall trap -flat surface w cover
Pooter - straw no directly in mouth
Sweeping nets - lil kids

Question 4

How is random sampling performed and what are its pros and cons?

Answer 4

RNG - coord gen
Pro: Removes biAs
Con: Sample may not be representative - this can be avoided via repetition

Question 5

What are the 3 types of non random sampling?

Answer 5

Opportunistic - choose where u want
Stratified - No’ of samples in each area are representative to their size
Systematic - Line + belt transect (measure change across areas in habititats)

Question 6

To calculate biodiversity u use Simpsons index:
D = 1 - Σ (n/N)^2
What does n and N mean?

Answer 6

n= No’ of individual species
N=No’ of individuals of all species (all the n’s added together)

Question 7

What is the formula for working out genetic biodiversity?

Answer 7

Total number of Loci

Question 8

What are the 3 benefits of maintaining biodiversity?

Answer 8

Ecological-Better genetic diversity protects species
Aesthetics-Yatah + Inspo
Economics-Ecotourism+Drug devs

Question 9

What are the 3 factors affecting Biodiversity?

Answer 9

Human growth-We strip mats
Agriculture-grow 1 thing
Climate change-cant adapt=die

Question 10

What does In situ mean + E.G?

Answer 10

Conservation within natural habitats. E.g Wild life conservation Decreases the number of humans and hunting and marine conservation zone = less overfishing

Question 11

What does ex situ mean + E.G?

Answer 11

Conservation outside natural habitats E.g Zoos/Captive breeding programs, Botanic gardens and Seed banks

Question 12

What are the 3 conservation agreements? Respect the 1v1,Blu div, Jon pardi flight attendant

Answer 12

• Convention on international trade of endangered species
• Rio convention on biological diversity - Enforces starts of conservation and biodiversity
• Countryside stewardship scheme - Give money to protect the country side