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Biomes

Biomes. a Dr. Production. IV. Terrestrial Biomes (life zones). A. Def. - geographical areas distinguished by particular dominant flora B. Characteristics 1. Not a place, but a class of plants 2. Determined by climate 3. Boundaries are indistinct

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Biomes

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  1. Biomes a Dr. Production

  2. IV. Terrestrial Biomes (life zones) • A. Def. - geographical areas distinguished by particular dominant flora • B. Characteristics 1. Not a place, but a class of plants 2. Determined by climate 3. Boundaries are indistinct 4. Convergent evolution common between similar biomes • Plant Adaptations Brain Pop Land Biomes (dekalbcs dekalb)

  3. Adaptations for Tundra Life

  4. Adaptations for CF Life

  5. Adaptations for DF Life

  6. Adaptations for RF Life

  7. Adaptations for Grassland Life

  8. Adaptations for Desert Life

  9. V. Marine & Aquatic Biomes • Primary ecological subdivisions of organisms 1. Plankton - at mercy of currents, weak or nonswimmers (small or microscopic) a. Phytoplankton - primary producers, (cyanobacteria or diatoms) b. Zooplankton - protists and small animals (larval stages) 2. Benthos - bottom dwellers (sessile, walking, or burrowing) 3. Nekton - larger, strong swimmers (top of the food chains)

  10. B. Freshwater 1. Zones a. Littoral zone - near shoreline, richest in life b. Limnetic zone - open water, sparse life c. Profundal zone - deep. anaerobic, no light, detritovores, mineral rich

  11. 2. Lake stratification and seasonal turnover

  12. 3. Types of lakes a. Oligotrophic - nutrient-poor, deep, sandy or rocky bottom, clear b. Eutrophic- nutrient-rich, phytoplankton very productive, shallow, murky Oligotrophic lake Eutrophic lake Eutrophication (lake aging)

  13. Adaptations for Aquatic Life

  14. Marine life zones 1. Estuaries and salt marshes - where rivers (freshwater) meets saltwater of ocean - most fertile water in the world, breeding grounds for many fish, nutrients from rivers meets constant mixing of tides (plants)

  15. 2. Intertidal zone- between high and low tides, rich in life forms (barnacles, clams, crabs), tidal pools 3. Subtidal zone - sea stars, sea urchins, worms, crabs, flounder 4. Neritic zone - over continental shelf (nekton and most benthic organisms are here (food is here) [photosynthetic limit - 200 meters] 5. Pelagic zone– includes neritic and open ocean 6. Benthic zone- deep waters, mostly predators

  16. = Neritic zone • (Neritic zone)

  17. Pelagic Zone

  18. Coral Reefs of the World

  19. Adaptations for Coral Reef Life

  20. Abyssal Zones 1. The mid-ocean ridge system with well known deep-water hydrothermal vent (ellipses) and cold seep (oblongs) regions. Vents: 1, Mid-Atlantic Ridge; 2, East Pacific Rise; 3, Galapagos Rift; 4, NE Pacific; 5 and 6, W Pacific back-arc spreading centres; 7, Central Indian Ridge. Cold seeps: 1, Gulf of Mexico; 2, NW Africa; 3, Laurentian Fan; 4, Barbados accretionary prism; 5, Monterey Bay; 6, Oregon subduction zone; 7, Sagami bay.

  21. Geothermal Vents, 2

  22. Adaptations for Abyssal Life

  23. Biomes Resources • Biome Interactive Movie • Biomes of the World Videos • Planet Earth: Ice Worlds: Oasis of Rock • Essential & Endangered: Coral Reef Biomes • Plant Adaptations

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