4.3: Explain How Quadrants can be Used to Sample the Distribution of Organisms in their Habitats

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

MEASURING DISTRIBUTION OF ORGANISMS:

DISTRIBUTION OF ORGANISMS IN HABITAT

Diagram showing How Quadrants are Utilised in the Field

METHOD: Place Quadrant Randomly within Sampling Area Count the Populations of Different Species within the Quadrant Repeat this Numerous Times within Sampling Area using the Same Size Quadrant Show Results on Map of Sampled Area, Showing in Which Areas Populations of Different Species are Dense or Not

INCREASING RELIABILITY OF RESULTS: Randomly Placed Use Same Size Quadrant Each Time Reliability of Results will Increase as More Samples are Taken