4.6 Biodiversity Flashcards
(8 cards)
1
Q
what is biodiversity
A
the variety of living things
2
Q
what is genetic diversity
A
variety of alleles of different genes within a population
3
Q
what is species diversity
A
number of different species in a community and number of individuals of each species
4
Q
what are indexes of diveristy
A
ways of quantifying species biodiversity
5
Q
how to calculate diversity index
A
Where N = total number of organisms of all species and n = number of individuals in each species
6
Q
how is crop diversity reduced
A
- herbicides
- rapid growth of crops and clearing area for crop growth
- monoculture
- reduced ecosystem diversity
7
Q
how is ecosystem diversity reduced
A
- draining land
- filling ponds
- removing hedgerows
- grazing
8
Q
what do conservation measures include
A
- increasing ecosystem diversity by replanting, digging ponds, producing hay from natural meadows
- increasing opportunities for species diversity by biological control, crop rotation and natural fertilisers
