Biodiversity 4B Flashcards
Define biodiversity
Variety of living organisms in a population
Define habitat
the place where an organism lives
Define community
all the populations of different species in a habitat
Define local diversity
considering a variety of different organisms in a small local habitat
Define global diversity
considering the variety of species on earth
Define species richness
the number of different species in a community
index of diversity equation
d = N(N-1)/{n(n-1)
N - total number of organisms of all species
n - total number of organisms of one species
{ -“sum of”
How does woodland clearance reduce biodiversity
increases the area of farmland and destroys habitat causing species to die or migrate
How does hedgerow removal reduce biodiversity
increases the area of farmland and destroys habitat causing species to die or migrate
How do pesticides reduce biodiversity
They directly kill the organisms
How do herbicides reduce biodiversity
they reduce the number of organisms that feed on the weeds
How does monoculture reduce biodiversity
farmers have fields with only one type of plant, this directly reduces biodiversity and will support fewer organisms
Examples of conservation schemes
Giving legal protection to endangered species
Creating protected areas - reducing developments including agricultural developments
The Environment Stewardship Scheme - which encourages farmers to conserve biodiversity
