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Why Are The Hawks Dying


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Why Are The Hawks Dying

  1. 1. STAYING ALIVE: Why are the Hawks Dying? A Food Chain Model
  2. 2. Rules of the Game <ul><li>1. Walking (or speedwalking) only! </li></ul><ul><li>2. One minute to forage </li></ul><ul><li>3.Collect enough food to survive. </li></ul><ul><li>4. Stop foraging when next wave arrives. </li></ul><ul><li>5. Stand on sidelines when captured. </li></ul>
  3. 3. Bioaccumulation <ul><li>1. Who got enough food to survive? </li></ul><ul><li>2. Who was eaten? </li></ul><ul><li>3. Who got poisoned? </li></ul>
  4. 4. Bioaccumulation <ul><li>Bioaccumulation is the increase in concentration of a substance in living organisms as they take in contaminated air, water, or food. </li></ul><ul><li>As bigger animals eat smaller animals, the level of contamination in the food is added to the level of contamination already in their body. </li></ul><ul><li>Toxins accumulate mostly in fat. </li></ul>
  5. 5. GRASSHOPPERS <ul><li>Herbivores </li></ul><ul><ul><li>Grass </li></ul></ul><ul><ul><li>Farm crops </li></ul></ul><ul><li>Grasshoppers are high in protein and low in fat. </li></ul>
  6. 6. FROGS <ul><li>Carnivores </li></ul><ul><ul><li>Bugs </li></ul></ul><ul><ul><li>Worms </li></ul></ul>
  7. 7. SNAKES <ul><li>Fish eggs, reptiles, and frogs </li></ul><ul><li>Centipedes, ants, termites, crabs, toads, crayfish, spiders, and grasshoppers </li></ul><ul><li>Other snakes </li></ul>
  8. 8. HAWKS <ul><li>Worms, beetles, frogs, mice and snakes </li></ul><ul><li>Rodents, insects and their larvae , fish </li></ul><ul><li>Rabbits, hares, and squirrels </li></ul>