Discusses the different terms of abundance, species richness, and diversity and how to calculate Shannon diversity index. Note: there is a miscalculation in the table at 1:34. The Ln(Pi) for the top row should be -0.36 and Pi x Ln(Pi) should be -0.25. The correct total for the last column of the table is -0.94. The diversity value for community A (shown beginning at 2:44) is 0.94.
