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IB Environmental Systems and Societies

Topic 1: Foundation

1.1 Perspectives

1.3 Sustainability

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

3.1 Biodiversity and evolution

3.2 Human impact on biodiversity

3.3 Conservation and regeneration

4.1 Water systems

4.2 Water access, use and security

4.3 Aquatic food production systems

4.4 Water pollution

5.2 Agriculture and food

Topic 6: Atmosphere and climate change

6.1 Introduction to the atmosphere

6.2 Climate change—causes and impacts

6.3 Climate change—mitigation and adaptation

6.4 Stratospheric ozone

Topic 7: Natural resources

7.1 Natural resources—uses and management

7.2 Energy sources—uses and management

7.3 Solid waste

Topic 8: Human populations and urban systems

8.1 Human populations

8.2 Urban systems and urban planning

8.3 Urban air pollution

HL.a Environmental law

HL.b Environmental economics

HL.c Environmental ethics

IB ESS HL/Topic 2: Ecology/2.2 Energy and biomass in ecosystems/2.2.21 (HL)—Autotrophs vs. heterotrophs

IB ESS 2.2.21 (HL) Autotrophs vs. heterotrophs

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