Biodiversity Flashcards
(9 cards)
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 )
