Biodiversity Flashcards
what is the meaning of the term biodiversity
biodiversity can be defined as the variety of different species and the numbers of individuals within those species in a habitat
what are quadrats used for
Quadrats are used to estimate the biodiversity of a habitat
what do you take in order to estimate the population size
samples are taken/used to estimate the population size
what is random sampling
random sampling is when an area is divided into the grid and are given co-ordinates
a random number generator provides a set of random co-ordinates
the quadrats can be placed using the co-ordinated
what is a transect
a transect is a line across a habitat usually placed using a tape measurer
when are transects used
transects are used when there is a change, or gradient in abiotic conditions across the habitat
what are transects used for
transects are used when looking for the change in the abundance or distribution of a species across the environment
what does a line transect do
a line transect records the species that make contact with the tape measure at regular intervals along the transect
what is the formula for population
the formula for population is population = number counted x ( total survey area / area sampled )
