4.2: Explain How Quadrats can be Used to Estimate the Population Size of an Organism in Two Different Areas

QUADRANTS: Square Made of Wires that is Divided into Smaller Areas in which Organisms underneath are Identified and Counted

MEASURING POPULATION OF ORGANISM:

ESTIMATING POPULATION SIZE OF ORGANISM

Diagram showing How Quadrants are Utilised in the Field

METHOD: Place Quadrant Randomly within Sampling Area Count the Number of Members of an Organism (Same Species) within the Quadrant Repeat this Numerous Times within Sampling Area using the Same Size Quadrant Repeat the Process in another Area to Compare Results

CALCULATION: The Equation to Calculate the Estimate of the Population Size of an Organism: Population Size = ( Total Area / Sampled Area ) x Number of Organisms Found