biodiversity in a community

Question 1

define biodiveristy

Answer 1

variety of living organisms in an area

Question 2

define habitat

Answer 2

place where an organism lives

Question 3

define community

Answer 3

all the populations of different species in a habitat

Question 4

local biodiversity what is it?

Answer 4

variety of different species living in a small habitat local to you

Question 5

global biodiversity what is it?

Answer 5

the variety of species on earth

Question 6

what is species richness?

Answer 6

measure of the number of different species in a community

Question 7

how can species richness be measured?

Answer 7

taking random sample of a community and counting the number of different species

Question 8

index of diversity what is it

Answer 8

using an equation takes both the number of species in a community and the population of both species

Question 9

index of diversity formula

Answer 9

d = N(n-1) / Sum n (n-1)

N - total number of organisms of all species
n - total number of organisms of one species
sum - sum of (added together)

Question 10

how does agriculture impact biodiversity

Answer 10

• woodland clearance to increase farmland area - directly reduce no of trees and then destroys habitats - hedgerow removal - increase farmland by turning lots of small fields in 1 big field
• pesticides - k ills insects , reduce bio
• herbicides - kills unwanted weeds, reduce food source and bio
• monocultures - less niches/habitats/ food sources