Biomes

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Biomes

• a Dr. Production

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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)

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Adaptations for Tundra Life
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Adaptations for CF Life
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Adaptations for DF Life
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Adaptations for RF Life
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Adaptations for Grassland Life
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Adaptations for Desert Life
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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)

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• 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

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• 2. Lake stratification and seasonal turnover

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• 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)
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Adaptations for Aquatic Life
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• 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)

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• 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

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Neritic zone

• (Neritic zone)

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• Pelagic Zone

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Coral Reefs of the World
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Adaptations for Coral Reef Life
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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.
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Geothermal Vents, 2
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Adaptations for Abyssal Life
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Biomes Resources

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