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Aquatic Life Zones

Aquatic Life Zones. Marine Biomes. Coastal Zone. Nearest to the shoreline Relatively warm, nutrient rich, shallow. Ample sunlight. Most productive marine zone (90% of species). Examples of Coastal Zones.

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Aquatic Life Zones

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  1. Aquatic Life Zones

  2. Marine Biomes

  3. Coastal Zone • Nearest to the shoreline • Relatively warm, nutrient rich, shallow. • Ample sunlight. • Most productive marine zone (90% of species).

  4. Examples of Coastal Zones • Examples: coral reefs, estuaries, coastal wetlands (marshes), beaches, barrier islands.

  5. Open Ocean Zone • Euphotic zone- 0 -200 meters. Light penetration allows photosynthesis. Phytoplankton and zooplankton are abundant.

  6. Bathyal zone- 200 – 1500 meters. Twilight condition. Fewer organisms. Less productive.

  7. Abyssal zone- 1500+. Total darkness. Organisms adapted to darkness and high pressure.

  8. Freshwater Biomes

  9. Lakes • Large, natural bodies of standing freshwater.

  10. Lake types • Eutrophic- well nourished. • Oligotrophic- poorly nourished. • Mesotrophic- medium levels of nutrients.

  11. Lake Zones • Littoral- along shoreline, emergent plants. • Limnetic- water zone with light penetration.

  12. More lake zones… • Produndal- to deep for light penetration, sparsely populated.

  13. Freshwater Streams • Water flows with gravity. Ex. river, creek. • Watershed- all areas which drain into a body of water.

  14. Stream Zones • Source- water rushes fast and cold from highland source. • Transition- begins to slow and warm

  15. More stream zones • Flood plain- stream becomes slow and meandering through flat country.

  16. Inland Wetlands • Lands covered with fresh water at least part of the year. Ex. Bogs, marshes, swamps, prairie potholes, mudflats, wet meadows.

  17. Aquatic Life Zone Determining Factors • Water type- salt or fresh • Light penetration- fuels photosynthesis • Nutrient inflow- near the land, upwellings • Depth- pressure, light penetration

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