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Environmental Biology

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Presentation on theme: "Environmental Biology"— Presentation transcript:

1 Environmental Biology
Unit 2 Advanced Higher Biology

2 Environmental Biology
Energy fixation & flow in ecosystems Circulation of Nutrients Biotic Interactions in Ecosystems Symbiotic Relationships The Costs, Benefits & Consequences of Interactions between Species Survival Strategies: Variations in Life History & Homeostasis Succession (Changes in Complexity) in Ecosystems Effects of Intensive Food Production Increase in Energy Needs Pollution

3 Energy Fixation Achieved by photosynthesis Autotrophic nutrition
Photoautotrophic Chemoautotrophic Change one form of energy into the chemical energy of organic molecules. Heterotrophic nutrition Rely on the consumption of ready made organic molecules

4 Variety of Ecosystems Tundra Forests Grasslands Aquatic Ecosystem
Arctic Alpine Forests Coniferous Temperate Tropical rainforests Grasslands Tropical (savanna) Temperate Aquatic Ecosystem Photic zone Aphotic zone Benthic zone

5 Activity To research one of the four different ecosystems
Design an A4 page summarising your ecosystem (poster style) or one PowerPoint slide. This can be typed or hand written It should be eye catching and large enough to read from a distance. You will present your ecosystem to the rest of the class.

6 Biomes of the world

7 Rainfall and Temperature around the world

8 Productivity Primary productivity NPP = GPP - R
The energy available to the next level in a food chain or food web is the gross primary productivity (GPP) minus the energy used by the plant during respiration (R) and is called the net primary productivity (NPP) NPP = GPP - R

9 Measuring Productivity
Biomass Factors affecting primary productivity Precipitation Temperature Light intensity Supply CO2

10 Pupil Activity Read CH 1 Environmental Biology of Scholar,
Answer the exam questions Answer the essay question on page 18. Give an account of energy fixation and energy flow in an ecosystem (15 marks)

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