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Environmental Science Chapter 1 Section 3

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Environmental Science Chapter 1 Section 3

  1. 1. Environmental Science Chapter 1 Section 3
  2. 2. Interactions <ul><li>All living things interact with their environment both biotic and abiotic </li></ul><ul><li>Most living things produce more offspring than can survive </li></ul>
  3. 3. Limiting Factors <ul><li>Most living things produce more offspring than can survive </li></ul><ul><li>Populations cannot grow indefinitely </li></ul><ul><li>The population can only be as big as the resources will allow </li></ul><ul><li>The environment contains a finite amount of food, water, living space </li></ul><ul><li>These factors are limiting factors because any one of these factors can limit the size of the population </li></ul>
  4. 4. Carrying Capacity <ul><li>The largest population that can be supported in a given environment </li></ul><ul><li>When a population grows larger than its carrying capacity, limiting factors in the environment cause the population to decrease. </li></ul>
  5. 5. Interactions Among Organisms <ul><li>Four main ways that species interact with one another </li></ul><ul><ul><li>Competition </li></ul></ul><ul><ul><li>Predator/prey </li></ul></ul><ul><ul><li>Symbiosis </li></ul></ul><ul><ul><li>coevolution </li></ul></ul>
  6. 6. Competition <ul><li>Can occur within populations and within communities </li></ul><ul><li>Organisms try to use the same resources </li></ul>
  7. 7. Coevolution <ul><li>Long-term change that takes place in two species because of their interactions with one another. </li></ul>
  8. 8. Predator/Prey <ul><li>Prey - organism that gets eaten </li></ul><ul><li>Predator – organism that eats the prey </li></ul><ul><li>Both predators and prey adapt in response to one another in order to survive </li></ul>
  9. 9. Symbiosis <ul><li>Close long-term relationship between different species in which at least one species benefits </li></ul><ul><ul><li>3 types </li></ul></ul><ul><ul><ul><li>Mutualism – both species benefits – ex coral and algae </li></ul></ul></ul><ul><ul><ul><li>Commensalism – one species benefits, the other is unaffected – ex sharks and remoras </li></ul></ul></ul><ul><ul><ul><li>Parasitism – one species benefits, the other is harmed </li></ul></ul></ul><ul><ul><ul><ul><li>Parasite – the organism that benefits </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Host – the organism that is harmed </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Ex- deer tick is parasite, deer is host </li></ul></ul></ul></ul>

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