Environmental Biology

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Presentation transcript:

Environmental Biology Unit 2 Advanced Higher Biology

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

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

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

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.

Biomes of the world

Rainfall and Temperature around the world

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

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

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)