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Ecology

Ecology. Ecology. Definition – scientific study of interactions between organisms and with their environment. Know LoO in Nature!. Key Levels in ecology Population Community Ecosystem. I. Environment. Biotic Factors include: Predators Prey pathogens. Environment.

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Ecology

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  1. Ecology

  2. Ecology • Definition – scientific study of interactionsbetween organisms and with their environment

  3. Know LoO in Nature! • Key Levels in ecology • Population • Community • Ecosystem

  4. I. Environment Biotic Factors include: • Predators • Prey • pathogens

  5. Environment • Abiotic include: • Temperature • Rainfall • Acidity • Wind • Sunlight…..(many components)

  6. Focus on EM Spectrum

  7. Radiant Energy akaAll EM Waves… • Travel in waves through empty space • Travel at “c”, the speed of light • Exist as both “waves” and “packets” (photons)

  8. UV (Ultra Violet) Remember: • Mutagenic • causes mutation •  promotes cancer •  promotes aging • But also necessary to convert:Cholesterol  Vitamin D!! • We are protected from MOST UV by OZONE

  9. Fig. 55-23 350 300 250 Ozone layer thickness (Dobsons) 200 100 0 ’60 ’80 1955 ’70 ’75 ’85 ’90 ’95 ’05 ’65 2000 Year

  10. Bees can see UV! What a bee sees….

  11. II. “Players” of Ecosystem • On your own…..

  12. III. Trophic Structures • Humans attempt to organize nature!!(ecosystems) • Tells us “who eats whom”! • Therefore indicates:  Energy flow  Chemical cycling

  13. III. Trophic Structures Types: • Food Chain/Food Web • Ecological Pyramid

  14. Food Chain: Lake Ecosystem

  15. Fig. 54-11 Quaternary consumers Carnivore Carnivore Tertiary consumers Carnivore Carnivore Secondary consumers Carnivore Carnivore Primary consumers Herbivore Zooplankton Primary producers Plant Phytoplankton A terrestrial food chain A marine food chain

  16. Fig. 55-10 Tertiary consumers 10 J Secondary consumers 100 J Primary consumers 1,000 J Primary producers 10,000 J 1,000,000 J of sunlight

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