Category: ESS 2.2 Energy and Biomass
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![ESS 2.2.5 [AHL] Ecological Yields & Efficiency](https://mypytrclass.com/wp-content/uploads/2025/02/image-5.png?w=1024)
ESS 2.2.5 [AHL] Ecological Yields & Efficiency
Learning Objectives Part 1: Maximum Sustainable Yield (MSY) Annual sustainable yield Question: Explain why sustainable yields are higher for lower trophic levels Answer: Sustainable Yield and Trophic Level Efficiency in Food Production Sustainable yield (SY) is a measure of the rate at which natural capital, or natural income, increases and can be utilized without depleting…
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![ESS 2.2.4 [AHL] Nutritional Roles of Organisms](https://mypytrclass.com/wp-content/uploads/2025/02/image-4.png?w=1024)
ESS 2.2.4 [AHL] Nutritional Roles of Organisms
Learning Objectives Part 1: Autotrophs VS Heterotrophs All living organisms can be classified as autotrophs or heterotrophs. Autotrophs Heterotrophs Part 2: Ecological Productivity Productivity in ecosystems Notes
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ESS 2.2.3 Bioaccumulation and Biomagnification
Learning Objectives Part 1: Bioaccumulation and Biomagnification Part 2: [Case study] DDT Introduction of DDT Banning History of DDT Part 3: Microplastics
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ESS 2.2.2 Food Chains and Pyramids
Learning Objectives Part 1: Food Chains and Food Web A trophic level is a stage of position of a organism in a food chain. From the above example, the organisms can be placed into these trophic levels: Trophic level 1 = grass Trophic level 2 = grasshopper Trophic level 3 = toad Trophic level 4…
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ESS 2.2.1 Energy in the Ecosystems
Learning Objectives Part 1: Roles of Organisms – Terminologies Activity 1: Download the following file. Cut the boxed and try to match the roles of organisms with its terminology. Alternative activity 1: Define the following roles of organisms with examples Part 2: Law of Thermodynamics Photosynthesis and Respiration Photosynthesis & Cellular Respiration in Ecosystems Equation…
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