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ECOLOGY (Ch. 50-53)

ECOLOGY (Ch. 50-53). 1. THE REVIEW!!!. Why is species X absent from an area?. Yes. Area inaccessible or insufficient time. Yes. Habitat selection. Does dispersal limit its distribution?. Yes. Predation, parasitism, competition, disease. Chemical factors. Does behavior limit its

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ECOLOGY (Ch. 50-53)

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  1. ECOLOGY (Ch. 50-53) 1 THE REVIEW!!!

  2. Why is species X absent from an area? Yes Area inaccessible or insufficient time Yes Habitat selection Does dispersal limit its distribution? Yes Predation, parasitism, competition, disease Chemical factors Does behavior limit its distribution? No Do biotic factors (other species) limit its distribution? Water Oxygen Salinity pH Soil nutrients, etc. No Do abiotic factors limit its distribution? No Temperature Light Soil structure Fire Moisture, etc. Physical factors Species dispersal and distribution Problems with Introduced Species

  3. 9 • Different factors may determine the distribution of a species on different scales • Refer to the biomes and biome characteristics • Most species have small geographic ranges

  4. Animal Behaviors • Defensive, Mating, etc. • Behavioral has both proximate and ultimate causes • Proximate: elicit a behavior • Ultimate: evolutionary significance • Behavior results from both genes and environmental factors

  5. How populations are linked 23

  6. 25 Trophiclevels Food Chain Food Web Energy Pyramids Producers, Consumers, Heterotrophs, Autotrophs (photo, chemo)

  7. Ch. 54-Ecosystems • All of the biotic and abiotic factors interacting. • NPP=GPP-R • Limiting Factors

  8. A General Model of Chemical Cycling

  9. Biological Magnification • When toxins become more concentrated in successive trophic levels of a food web.

  10. LIGHT & HEAT ENTER BUT DON'T ESCAPE

  11. Ch. 55 Conservation Biology • Endangered Species • Introduced Species • Invasive species

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