In this revision video, we'll be covering the whole topic of Biodiversity for the OCR (A) A level Biology specification. The specification reference is 4.2.1. We'll look at how biodiversity can be considered at the genetic, species and habitat level; how to calculate genetic biodiversity and species biodiversity (using Simpson's Index); the practical skills required for this topic, i.e. sampling plants (quadrats, transects), sampling animals and estimating population sizes (i.e. Lincoln's index and the Petersen capture-release-recapture method); the factors affecting biodiversity (deforestation, agriculture and climate change); the aesthetic, economic and ecological reasons for maintaining biodiversity; the in situ and ex situ methods of conservation; international agreements.
This video is designed predominantly for revision purposes.
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