1 Trophic levels in Ecosystems Food Chains, Food Webs, Energy Pyramids, Biological magnification

2 Begins with the SUNBegins with the SUN PhotosynthesisPhotosynthesis

3 Organisms that can make glucose during photosynthesis are called Organisms that can make glucose during photosynthesis are called PRODUCERS.

4 Producers use most of the energy they make for themselves.

5 The energy that is not used by producers can be passed on to organisms that cannot make their own energy.

6 Organisms that cannot make their own energy are called CONSUMERS.

7 Consumers that eat producers to get energy: Are first order (1 st ) or primary consumers Are herbivores (plant- eaters)

8 Some of the energy moves into the atmosphere as heat.

9 Some energy in the primary consumer is STORED & not lost to the atmosphere or used by the consumer itself. This energy is available for another consumer (predator).

10 Some of the energy is lost as heat, but some energy is stored and can passed on to another consumer.

11 Consumers that eat producers & other consumers Are called omnivores Omnivores eat plants and animals

12 Consumers that hunt & kill other consumers are called predators. The animals that are hunted & killed are called prey.

13 Consumers that eat other dead consumers are called scavengers copyright cmassengale

14 The transfer of energy from the sun to producer to primary consumer then to higher order consumers can be shown in a FOOD CHAIN.

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16 A Consumer that Eats Another Consumer for Energy: Is called a secondary or 2nd order consumer Is called a secondary or 2nd order consumer May be a carnivore or a omnivore May be a carnivore or a omnivore May be a predator May be a predator May be a scavenger May be a scavenger

17 Food Chains Show Available Energy

18 Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID

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20 TROPHIC LEVELS

21 Food Webs: Are interconnected food chains Are interconnected food chains They show the feeding relationships in an ecosystem They show the feeding relationships in an ecosystem

Biological Magnification (Biomagnification): Video 22

Ecosystems 23

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Ecosystems Biotic factors Living organisms - Algae – P - Protists-P - Some Bacterias – P - Aquatic Plants – P - Marine Animals – C, D - Protozoars – C, D - Microscopic Organisms - D Abiotic factors Light Temperature Salinity Ocean movement Water density copyright cmassengale25

26 Identify the Producers, Consumers, & Decomposers: Count the Food Chains! copyright cmassengale

Homework – 50 p Create a story using the following vocabulary words: Ecosystem, community, population, biotic factors, abiotic factors, habitat, ecological model, trophic level, producers, consumers and decomposers. You can add pictures. Try to be creative! 27