8.2 life in the ocean

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  • 1. Life in the Ocean Mr. Silva Ag Earth Science Ag Earth Science Ag Earth Science Ag Earth Science
  • 2. 21.2 Life in the Ocean1. Sunlight and Marine Life a. Plant growth is restricted to the ocean surface layer in order to get enough sunlight to sustain photosynthesis - 100m depth. - Plankton live at this depth as well a. This is the tidal range or intertidal zone
  • 3. 21.2 Life in the Ocean2.Ocean Environments a. Benthic zones: the bottom (land) area of the ocean i. Intertidal zone ∀ Located between the tides ∀ includes marine life attracted to sun
  • 4. 21.2 Life in the Oceanii. Sublittoral zone ∀ Located on the continental shelf ∀ Includes small “attached” organisms
  • 5. 21.2 Life in the Oceaniii. Bathyal zone ∀ Covers the continental slope ∀ Very little plant life since there is no light
  • 6. 21.2 Life in the Oceaniv. Abyssal zone ∀ Located along the abyssal plains ∀ Organisms live constantly in darkness
  • 7. 21.2 Life in the Oceanv. Hadal zone ∀ Confined to ocean trenches ∀ Organisms depend on food to fall from above
  • 8. 21.2 Life in the Oceanb.Pelagic zones: the water area of the ocean i. Neritic zone • Located above the continental shelf • Ideal area for all marine life ii. Oceanic zone (four layers based on depth) • Epipelagic • Mesopelagic ∀ Bathypelagic ∀ Abyssopelagic