5B - Energy Transfer In Ecosystems

Ecosystem

What are producers in the ecosystem and how do they work?

Biomass

Measuring Biomass - Dry Mass

Measuring Biomass - Calorimeter

Food chain

Gross Primary Production

Respitory loss

Net Primary Production

Primary Productivity

Net primary production equation

Net production of consumers - where do consumers store their chemical energy and how much energy is transferred to the next trophic level?

Net production of consumers equation

Alternative terms for net production

Efficient energy transfer

Food webs and food chains

Decomposer’s role in food webs

Farming practices to increase efficiency of energy transfer - Simplifying food webs

Farming practices to increase efficiency of energy transfer - Reducing respiratory losses of energy

Natural ecosystem

Microorganisms’ role in the nutrient cycle

Extracellular digestion

Saprobiotic nutrition

Mycorrhizae

Nitrogen cycle

4 Stages of the Nitrogen cycle

Nitrogen fixation, ammonification, nitrification and denitrification

Stage 1 - Nitrogen fixation

Stage 2 - Ammonification

Stage 3 - Nitrification

Denitrification

Phosphorus cycle

Phosphorus cycle Stages

What impact do harvested crop/livestock have on the nutrient cycle?

How do we solve this?

Artficial fertilisers vs natural fetilisers

Leaching

Chemical/Natural fetilisers effect on leaching

How eutrophication occurs