Biodiversity

Question 1

Define Bidodiversity

Answer 1

The variety of living organisms in an area

Question 2

Define habitat

Answer 2

The place where an organism lives

Question 3

Define community

Answer 3

All the populations of different species within a habitat

Question 4

Define species diversity

Answer 4

The number of species and number of individuals within each species in a specified area

Question 5

What is ecosystem diversity?

Answer 5

A measure of the range of habitats on a range of scales from a small ecosystem to the whole world

Question 6

What are two scales of biodiversity?

Answer 6

Local biodiversity and global biodiversity

Question 7

What is species richness?

Answer 7

Number of different species in a community, simple measure of biodiversity measured by random samples and counting the number of species

Question 8

How is biodiversity measured? What is the calculation?

Answer 8

By using the index of diversity:
D= N(N-1)       
     ━━━
     Σn(n-1)
N=Total number of all species
n= Total number of one species
Σ= Sum of

Question 9

What agricultural practices reduce biodiversity?

Answer 9

➣Woodland clearance= reduces habitats, food and species, resulting in death/migration
➣Hedgerow removal= reduces as above
➣Pesticides= reduces food sources by killing pests
➣Herbicides= reduces weed as a food source & plant diversity
➣Monoculture= one type of plant reduces biodiversity directly, supports fewer organisms

Question 10

What are conservation schemes?

Answer 10

Schemes to protect biodiversity. Examples include legal protection to endangered species and protected areas that restrict further development