This detailed and engaging lesson describes the different ecological techniques used to assess the abundance and distribution of organisms in a habitat. In line with point 10.1 (iv) of the Edexcel A-level biology B specification, the following techniques are included in the PowerPoint and accompanying resources:
- quadrats (of differing areas)
- transects
- ACFOR scale
- percentage cover
The mathematical element of the course is challenged in the early stages of this lesson, when the students have to estimate the populations of different plant species using data obtained with a quadrat. Understanding checks are used throughout the lesson to allow the students to assess their progress against the current topic and they are encouraged to consider the advantages and disadvantages of each technique.
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