Ecological pyramids 0.0 / 5 ? BiologyEcology, ecosystems and environmental biologyA2/A-levelAQA Created by: meganbradfield1Created on: 09-06-16 14:12 How are pyramids of number presented? Numbers of organisms at lower trophic levels are greater than the numbers at higher levels 1 of 6 Negatives of pyramids of number? No account is taken of size, can be impossible to accurate large numbers on same scale as other species 2 of 6 What is biomass? Total mass of plants and/or animals in a place 3 of 6 Negative of pyramids of biomass Only organisms present at a certain time are shown, seasonal differences not apparent 4 of 6 Why are pyramids of energy more reliable? 2 organisms of same dry mass may store different amounts of energy 5 of 6 What is energy flow measured in? kJm-2/year-1 6 of 6
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