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Habitat Degradation for the Blue Crab

Habitat Degradation for the Blue Crab. GK-12 Camp Wednesday, August 5, 2009 SOL 4.5, 6.7. Pollution & Water Quality. Nutrients Sediment. Algae Dissolved Oxygen. Habitat & Niche. Habitat the place or kind of place in which an animal or plant naturally lives Niche

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Habitat Degradation for the Blue Crab

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  1. Habitat Degradation for the Blue Crab GK-12 Camp Wednesday, August 5, 2009 SOL 4.5, 6.7

  2. Pollution & Water Quality • Nutrients • Sediment • Algae • Dissolved Oxygen

  3. Habitat & Niche • Habitat • the place or kind of place in which an animal or plant naturally lives • Niche • function or needs of an organism in its environment • Ecosystems are all living and non-living things linked to one another • Humans

  4. Sea grasses • Make large area in shallow water = beds • Protection/shelter • Food • Sea grass needs • Light • Water • Nturients

  5. Sea grass provides… • Habitat (protection and a food source) • Attracts many small prey for predators • Dissolved oxygen • Traps sediment • Uses up some nutrients in the water

  6. Eastern Oyster

  7. Oyster reefs • Filter feeder • Particles , phytoplankton • Forms reefs • Builds up over time Oyster dredge Bottom of Bay

  8. Oyster stress • MSX (1959) & Dermo (1949) • Singled cell parasite • Sediment • Nutrients • Dissolved Oxygen Healthy Unhealthy

  9. Examining the loss of habitat • Modeling • Use real data (bushel of oysters and acres)

  10. Blue Crab Life Cycle In ocean Winds, tides, and currents bring young crabs into the Bay Out the mouth of the Bay Need suitable habitat for young crabs

  11. Crab Habitat Game Pour baby crabs (sand) down the foam board Bushels of oysters Acres of sea grasses Foam board – mouth of the Bay Box or foam support Pan

  12. Where did most of your crabs go? • Into the tray (found no habitat) • Into sea grass • Into the oyster reefs • It depends What activities could increase blue crab habitat?

  13. Help me! • What can you do? • Why is that important?

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