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Warm up- copy and answer

Warm up- copy and answer. If there is 2500 J of energy in the 1 st trophic layer of this pyramid. How much energy reaches the sparrow hawk? What type of pyramid is Pyramid B? How is it that the 1 st trophic level is smaller than the other layers?. Species Interactions.

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Warm up- copy and answer

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  1. Warm up- copy and answer • If there is 2500 J of energy in the 1st trophic layer of this pyramid. How much energy reaches the sparrow hawk? • What type of pyramid is Pyramid B? How is it that the 1st trophic level is smaller than the other layers?

  2. Species Interactions

  3. What Shapes an Ecosystem? • Biotic (living) and abiotic (nonliving ) factors. • Habitat- Area in which an organism lives. • Niche • Species interactions

  4. What is a Niche? • Niche- • the full range of physical and biological conditions in which an organism lives. • The way the organism uses those conditions.

  5. What is a niche? • Includes: • Physical conditions in which the organism lives. • Habitat. • Temperature ranges. • Position in food web. • Food choices • Reproductive strategy

  6. Species Interactions • Interactions between populations within a community can greatly affect an ecosystem. • Symbiosis • Predation • Competition • Inhibition

  7. Symbiosis • When two species live together: • Mutualism • Parasitism • Commensalism

  8. Symbiosis • Mutualism- two species provide resources or services to each other • Both benefit.

  9. Symbiosis • Mutualism- benefit usually in –nutrition, transportation, protection Acacia Ant Clown Fish- Anemone

  10. Symbiosis • Parasitism- One organism feeds on another • Benefits parasite • Harms host Tapeworm Roundworm Heartworm

  11. Commensalism • One species benefits from another • Enhances fitness of one species • No effect on other species Epiphyte

  12. Predation • Predation- one species feeds on another • Carnivores- kill and eat one prey • Herbivores- remove and eats parts of many prey, rarely lethal • Parasites- consume nutrients from one prey, rarely lethal

  13. Competition • Competition- two species require the same limited resource in an environment. • Can harm one or both species

  14. Competition • Interspecific competition- between members of different species • Intraspecific competition- between members of the same species

  15. Competition • Competitive exclusion principle- • If two species occupy the same niche, the stronger competitor will eliminate the competitor. • Weaker competitor leaves niche or becomes extinct

  16. Competitive exclusion

  17. Competitive Exclusion

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