A site set up to document my studies in IGCSE Biology; with notes on each objective covered that is necessary for the final IGCSE Examinations. Hope you enjoy!
Tuesday, 10 May 2011
4.2 Quadrates
Quadrates = Method of sampling different locations within an ecosystem, to compare respective population sizes.
Sand Dune Ecosystem (for example) --> Community / Habitat, split by fence
--> Grazed (A)
--> Ungrazed (B)
Counting population (Quadrating): Estimate of population size
Using squares (1m x 1m)
Take sample of population using square grid Count number of organisms
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