biodiversity

Question 1

what is species richness?

Answer 1

a measure of the number of different species in a community

Question 2

what is the index of diversity?

d= N(N-1) / ^^n(n-1) explain this

Answer 2

describes the relationship between the number of different species and number of individuals in a community

N=total number of organisms in a species
n= total number of organisms of each species in each species(nxn-1)+(nxn-1)+(nxn-1)

Question 3

Farming techniques that decrease species diversity

Answer 3

monocultures- growing 1 species

Ploughing

Crop spraying with pesticides and insecticides

filling in ponds and draining wetlands

overgrazing

destruction of hedgerows

Question 4

Methods of conservation

Answer 4

uncultivated strips of land alongside hedges provide a food source and habitats

delayed harvesting of crops allow seed dispersal

meadow conservation conflicts with grass planting