Life in the Ocean

Mr. SilvaAg Earth Science

Life in the Ocean

Mr. SilvaAg Earth Science

21.2 Life in the Ocean21.2 Life in the Ocean

1. Sunlight and Marine Lifea. 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

b. This is the tidal range or intertidal zone

1. Sunlight and Marine Lifea. 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

b. This is the tidal range or intertidal zone

21.2 Life in the Ocean21.2 Life in the Ocean

2.Ocean Environmentsa. Benthic zones: the bottom (land) area of

the oceani. Intertidal zoneLocated between the tidesincludes marine life attracted to sun

2.Ocean Environmentsa. Benthic zones: the bottom (land) area of

the oceani. Intertidal zoneLocated between the tidesincludes marine life attracted to sun

21.2 Life in the Ocean21.2 Life in the Ocean

ii.Sublittoral zoneLocated on the continental shelf Includes small “attached” organisms

ii.Sublittoral zoneLocated on the continental shelf Includes small “attached” organisms

21.2 Life in the Ocean21.2 Life in the Ocean

iii. Bathyal zoneCovers the continental slopeVery little plant life since there is no light

iii. Bathyal zoneCovers the continental slopeVery little plant life since there is no light

21.2 Life in the Ocean21.2 Life in the Ocean

iv. Abyssal zoneLocated along the abyssal plainsOrganisms live constantly in darkness

iv. Abyssal zoneLocated along the abyssal plainsOrganisms live constantly in darkness

21.2 Life in the Ocean21.2 Life in the Ocean

v. Hadal zoneConfined to ocean trenchesOrganisms depend on food to fall from above

v. Hadal zoneConfined to ocean trenchesOrganisms depend on food to fall from above

21.2 Life in the Ocean21.2 Life in the Ocean

b.Pelagic zones: the water area of the oceani. Neritic zone

•Located above the continental shelf

•Ideal area for all marine life

ii.Oceanic zone (four layers based on depth)•Epipelagic

•MesopelagicBathypelagicAbyssopelagic

b.Pelagic zones: the water area of the oceani. Neritic zone

•Located above the continental shelf

•Ideal area for all marine life

ii.Oceanic zone (four layers based on depth)•Epipelagic

•MesopelagicBathypelagicAbyssopelagic