biome sydney 4

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OPEN OCEAN
A. Lowery
S. Mitchell
OPEN OCEAN BIOME
• Earth surface is 70% ocean water.
• Ocean biomes are very large, and are found all
over the planet.
• There are five Ocean biomes; the North and
South Pacific Oceans, the Atlantic Ocean,
Indian Ocean, and the Arctic Ocean.
OPEN OCEAN BIOME
• The average ocean water contains 35g/L salinity.
• Salinity levels can vary from 32 to 37 g/L. This is
normally caused by evaporation, river run off, ice
formation, and rainfall.
• Depths in the ocean can be up to 15,215 feet
deep in the Pacific Ocean.
– Mariana Trench 36,200 feet deep
• Water near the polar regions are colder, water
near the top is warmer and water at the bottom
of the ocean is cooler.
OPEN OCEAN BIOME
• The main organisms found in an ocean biome
food web are;
–
–
–
–
Phytoplankton,
Krill
Fish
whales.
• Depending on the location of the biome there
may be
–
–
–
–
penguins,
leopard seals
birds like pelicans
squids.
OPEN OCEAN BIOME
• Oceans are separated into separate zones.
– Intertidal Zone is where the ocean and land meet. The
pelagic zone is where one can find wales because it is very
far away from the land in contrast to the intertidal zone,
and tends to be very cold due to its deepness.
– Next is the Benthic Zone which is below the pelagic zone.
Temperature drops drastically from the last zone and the
depth increases.
– The Abyssal Zone, even deeper than the benthic zone, the
waters reach around 3 degree Celsius. Here the pressure is
far too high for humans to travel. This zone contains many
invertebrates and fish that can survive the harsh
conditions.
FUN FACTS!
• Sunlight can penetrate up to 200 meters in the
ocean
• 90% of marine life lives at the top of the ocean
• The open ocean is called the pelagic zone and
the deep sea is the benthic zone
• The ocean is the most diverse ecosystem
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