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Chapter 2.2 Trophic Level: Who eats who in the food chain Steps along which materials & energy pass Shown as food chains, webs & pyramids.

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Presentation on theme: "Chapter 2.2 Trophic Level: Who eats who in the food chain Steps along which materials & energy pass Shown as food chains, webs & pyramids."— Presentation transcript:

1

2 Chapter 2.2

3 Trophic Level: Who eats who in the food chain Steps along which materials & energy pass Shown as food chains, webs & pyramids

4 Food Chain: ONLY ONE source of food Less stable

5 Food Web: More than one choice of food Several food chains linked together More stable

6 Tertiary Secondary Primary consumer Producer

7 Tertiary Secondary consumer Primary consumer Producer

8 Illustrates? Food Chain of numbers of biomass of energy

9 10% of the energy is passed on as biomass 90%: Lost as Waste Used for Reproduction

10 Magnification= to increase Concentration of toxins Are magnified In upper pyramid levels

11 the top consumer requires more biomass and concentrates the toxin

12 Human Shark Bass Smelt Algae Who is most susceptible ?

13 Cycles in Nature:

14 Energy Flows ………... Flows in one direction Will never return to the same form Conservation of Energy: Energy changes form But is never lost

15 Matter cycles………….. Matter can be recycled Matter can be reformed The basic building blocks are reused Conservation of Matter

16 Carbon cycle………...

17 Tracing the cycling of matter…..

18 Energy & Matter in an Ecosystem:


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