IB ESS HL 2.2.14 Limits on Trophic Levels Topic Practice

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IB Environmental Systems and Societies

Topic 1: Foundation

Topic 2: Ecology

2.1 Individuals, populations, communities, and ecosystems

2.2 Energy and biomass in ecosystems

2.2.1—Ecosystem sustenance

2.2.2—First law of thermodynamics

2.2.3—Energy and matter transformation

2.2.4—Photosynthesis

2.2.5—Producers

2.2.6—Cellular respiration

2.2.7—Heat generation

2.2.8—Second law and energy loss

2.2.9—Consumer energy sources

2.2.10—Producers and food chains

2.2.11—Food chains and trophic levels

2.2.12—Food-chain energy losses

2.2.13—Gross and net productivity

2.2.14—Limits on trophic levels

2.2.15—Food webs

2.2.16—Biomass measurement

2.2.17—Ecological pyramids

2.2.18—Non-biodegradable pollutants

2.2.19—Microplastics

2.2.20—Human activity impacts

2.2.21 (HL)—Autotrophs vs. heterotrophs

2.2.22 (HL)—Photoautotrophs and chemoautotrophs

2.2.23 (HL)—Primary productivity

2.2.24 (HL)—Secondary productivity

2.2.25 (HL)—NPP and food chains

2.2.26 (HL)—Maximum sustainable yield

2.2.27 (HL)—Lower trophic level yields

2.2.28 (HL)—Ecological efficiency

2.2.29 (HL)—Entropy in ecosystems

2.3 Biogeochemical cycles

2.4 Climate and biomes

2.5 Zonation, succession and change

Topic 3: Biodiversity and conservation

Topic 6: Atmosphere and climate change

Topic 7: Natural resources

Topic 8: Human populations and urban systems

IB/ESS/HL//Question Bank/Topic 2: Ecology/2.2 Energy and biomass in ecosystems/2.2.14—Limits on trophic levels

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