Draw a pyramid of numbers for this food chain Starter I have 1 lion, 3 antelopes and a 20 large plants to get from the quarantine area to different sections of the safari park – how could I transport them around the park safely? I can only have room for one species in my trailer at a time. I can’t leave the antelopes alone with the lion or the plants or something will get eaten!

Solution take the antelopes first then come back with an empty trailer then take the plants and bring the antelopes back then take the lion (leave the antelopes there) then come back with and empty trailer then take the antelopes All arrive safely!

1 lion 3 antelopes 20 large plants

Pyramid of Biomass Lesson Objectives: To know where biomass comes from To know what a pyramid of biomass shows To know where energy is lost

Pyramid of numbers do not always look like pyramids Oak tree aphid ladybird ladybird parasites What would be a better way of showing the flow of energy? s s s

Oak tree aphid ladybird ladybird parasites Pyramid of Biomass Oak tree aphid ladybird ladybird parasites These show the total dry mass of the organisms at each trophic level. They are always pyramid shape. Parasites Ladybird Aphids Oak Tree

biomass are the mass of material in living organisms Ultimately all biomass is built up using energy from the sun. Biomass is often measured as the dry mass of blogical material in gram’s. The biomass made by plants is passed on through food chains or food webs. it goes into the animals that eet the plants. The amownt of biomass at each stage of a food chain is less than it was at the privious stage.

Biomass is the mass of material in living organisms Biomass is the mass of material in living organisms. Ultimately all biomass is built up using energy from the Sun. Biomass is often measured as the dry mass of biological material in grams. The biomass made by plants is passed on through food chains or food webs. It goes into the animals that eat the plants. The amount of biomass at each stage of a food chain is less than it was at the previous stage.

How to construct a pyramid of biomass Construct a pyramid of biomass for the following food chain. Use the graph paper below where 1 small square will represent 100kg: Grass  Rabbit  Fox 50,000 1,200 500 0.1kg 3kg 5kg 3,600kg 5000kg 2,500kg

How to construct a pyramid of biomass Construct a pyramid of biomass for the following food chain. Use the graph paper below where 1 small square will represent 100kg: Grass  Rabbit  Fox 100 5000kg 3,600kg 100 2,500kg 100 50 squares 36 squares 25 squares Foxes Rabbits Grass

Findings from our pyramid of biomass Q1. What is happening to the biomass as we go up the food chain? Q2. What is happening to the energy as we go up the food chain?

Energy is reduced at each trophic level WHY? Respiration Heat loss Growth Moving Excretion Not all material consumed Not all material digested Parasites Ladybird Aphids Oak Tree

Only 10% of energy is passed on to the next trophic level 1% Oak tree aphid ladybird ladybird parasites 10% 0.1% 90% *energy lost (reflection off leaf) 90% *energy lost 90% *energy lost

Use graph paper to draw your pyramids of biomass to scale Tasks Complete the worksheet Answer question 2 and 3 on Page 95 Create your own pyramid of biomass (ask for the worksheet) Extension Draw out the pyramid of biomass to scale and then answer question 1 on Page 104

Plenary The amounts of ______ and _______ contained in living things always gets less at each stage of a food _______ from ________ onwards. Biomass is lost as ________ products and used to release energy in _______. This is used for _______ and to control body __________. Only a small amount is used for _________. biomass temperature energy chain growth movement producers respiration waste

Plenary The amounts of biomass and energy contained in living things always gets less at each stage of a food chain, from producers onwards. Biomass is lost as waste products and used to release energy in respiration. This is used for movement and to control body temperature. Only a small amount is used for growth.