biodiversity Flashcards
the nearer an area is to the equator…
the greater the biodiversity
what are the 3 levels biodiversity can be measured on?
- habitat
- species
- genetic
habitat biodiversity
no. diff habitats in an area
generally, the more habitat diversity in an area, the greater the
species diversity
what are the two different components of species biodiversity?
- species evenness
- species richness
species evenness
a comparison of the no. individuals of each species living in a community
community
all the populations of living organisms in a particular habitat
species richness
the no. species living in a particular area
genetic biodiversity
variety of genes that make up a species
the more alleles = more variety of phenotypes = better adaptation for changing environment = resistance to disease
abundance of an organism
the no. individuals of a species present in an area
sampling is used to ….
- estimate the no. organisms in an area
- measure a particular characteristic of an organism
in a random sample…
each individual in the population has an equal likelihood of selection
what are the names of the three techniques for non-random sampling
opportunistic
stratified
systematic