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Ecosystems For Grades 4-6
- 1. Ecosystems What is anecosystem? An ecosystem is a place where animals, plants, and non-living materials exist together. A Joe Fasen Enhanced Power Point Presentation
- 2. Ecosystems If you couldchoose an ecosystem in which to live which one would you choose? Why? Let’s take a look at some ecosystems to help you decide….
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- 13. Ecosystems What interactions takeplace in an ecosystem? What goes on in an ecosystem?
- 14. Predation • When oneorganism hunts and eats another. • The fox is the predator and the rabbit is the prey.
- 15. Scavengers • Animals thatfeed on decaying or dead plants or animals.
- 16. Producers • Green plantsthat use energy from the sun to produce food through process of photosynthesis.
- 17. Consumers • Organisms thatdo not make their own food but eat other organisms.
- 18. Carnivores • Animals thateat only MEAT.
- 19. Herbivores • Animals thatonly eat PLANTS.
- 20. Omnivores • Eat bothplants and meat
- 21. Decomposers • Consume wastesand dead organisms. – Examples: fungi, bacteria, earthworms
- 22. Symbiosis • Specific interactionbetween two species over a long period of time “living together” Both species benefit One species benefits, the other is neither helped nor harmed. One species benefits, the other is harmed
- 23. Succession • The gradualchange of one community to another over time. • Succession happens in all communities.
- 24. • Sometimes forestsgo through long periods of time without rain. A fire could start during one of these dry spells. What would happen then? (succession)
- 25. • In theforest fire, many trees and animals will die. – Many animals will move away from the forest to a new location.
- 26. • After theforest fire, the community will begin to rebuild: – Plants begin to grow – Animals come back to feed on the new plants.
- 27. • Eventually, newtrees will grow. – Small trees will grow at first, but after many years, larger trees such as spruce and fir may grow.
- 28. • So, hereis our example of succession: Forest fire occurs Small trees begin to grow Trees & animals die or relocate Plants begin to grow; animals return to feed on new plant growth Large trees grow; completing the forest