Trophic Levels and Pyramids of Biomass

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In this lesson, we first look at trophic levels and how they arranged. We then learn about pyramids of biomass and their common characteristics. We then look at how energy is lost between trophic levels, how to calculate the efficiency of energy transfers and how to draw pyramids of biomass in an exam context. We finally look at how to work with biomass and how decomposers fit into all of this. As always, in the last 5-10mins of the video I go through some past paper questions and show you how to score top marks if this topic comes up in the exam.