A Level Biology - Biodiversity

**This Powerpoint specifically uses the Cambridge AS Level Biology Syllabus and covers all criteria for – Unit Biodiversity
**
Students will be able to -

1define the terms ecosystem and niche

2 explain that biodiversity can be assessed at different levels,
including:
• the number and range of different ecosystems and
habitats
• the number of species and their relative abundance
• the genetic variation within each species

3 explain the importance of random sampling in determining the
biodiversity of an area

4 describe and use suitable methods to assess the distribution
and abundance of organisms in an area, limited to frame
quadrats, line transects, belt transects and mark-releaserecapture using the Lincoln index (the formula for the Lincoln
index will be provided, as shown in the Mathematical
requirements)

5 use Spearman’s rank correlation and Pearson’s linear
correlation to analyse the relationships between two variables,
including how biotic and abiotic factors affect the distribution
and abundance of species (the formulae for these correlations
will be provided, as shown in the Mathematical requirements)

6 use Simpson’s index of diversity (D) to calculate the
biodiversity of an area, and state the significance of different
values of D (the formula for Simpson’s index of diversity will be
provided, as shown in the Mathematical requirements)

**Every Powerpoint includes learning objectives, a starter and plenary, suitable activities and review questions with mark scheme. We also provide a FREE pdf version of the file so it can easily be printed for students as a handout or uploaded to the school VLE system
**
Bring your Cambridge AS Level Biology lessons to life with our expertly designed teaching resources. Each unit is tailored to the latest syllabus, offering ready-to-use lesson plans, engaging experiments, and visually clear notes that save hours of prep time. Whether you’re new to the course or refining your approach, The Science Shelf gives you everything you need to boost student understanding and exam success — all in one place.