Sampling Methods

Flashcards about Sampling Methods

Observation

The act of watching species in their natural habitat and recording common species of plants and animals.

Quadrat Method

A method used in flat areas where a quadrat is placed randomly in the study area and the number of slow moving and stationary organisms are counted.

Line Transect

A method used for slopes and areas where one habitat changes to another, involving a piece of string placed in a straight line with marks at regular intervals to count slow moving or stationary organisms that touch the string.

Belt Transect

A method involving placing a piece of string of a certain length and then randomly throwing a quadrat along the length of the string to count the organisms in the quadrat.

Capture-Recapture

Involves catching a set number of organisms, tagging and releasing them, and then catching more organisms to record the number that was recaptured.

Calculating Population Size

Total population = (number captured 1st x number captured 2nd) ÷ number of tagged organisms that are recaptured

Calculating Species Frequency

(number of throws where the species is seen ÷ number of throws) X 100%

Calculating Species Density

Total number of organisms of a species ÷ number of quadrat throws (if the quadrat is 1m^2)