Life Away From Shore. Ocean life differs farther away from shore. Conditions in the Neritic Zone. The shallow water over the continental shelf receives sunlight and a steady supply of nutrients washed from the land into the ocean. The light and nutrients enable large plantlike algae to grow.
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Life Away From Shore Ocean life differs farther away from shore.
Conditions in the Neritic Zone • The shallow water over the continental shelf receives sunlight and a steady supply of nutrients washed from the land into the ocean. • The light and nutrients enable large plantlike algae to grow.
Life in the Neritic Zone • More organisms live here than in any other ocean zone. • B/C of the supply of nutrients. • Nutrients are washed off of land and supplied by upwelling currents.
Coral Reef • Coral reefs are created by colonies of tiny coral animals. • Coral reefs only form shallow, tropical ocean waters. • Atoll: a ringed shaped reef surrounding a lagoon. • Coral reef animals include: octopuses, lobsters, shrimp, and fish… including Nemo!
Kelp: large heavy algae that grow in parts of the neritic zone. Kelp forests grow in cold neritic waters where the ocean has a rocky floor. Kelp use sunlight and dissolved gases in the neritic zone to produce their own food. B/C of their size, kelp require the rocky bottom of the ocean floor to anchor to and air bladders to keep them upright in the water. Kelp forest animals: young whales, sea otters, and sea urchins. Kelp Forests
Conditions in the Open Ocean • Open ocean begins at the edge of the continental shelf. • Only a small part of the open ocean receives sunlight. • Dissolved nutrients are less abundant in the open ocean.
Surface Zone: only part of the open ocean that receives enough sunlight to support the growth of algae. Transition Zone: colder and darker than surface zone. Deep Zone: few organisms live here b/c of cold, dark conditions. Bioluminescence: ability of living things to produce their own light. Limited food supply causes special adaptations. Divisions of the Open Ocean
Hydrothermal Vents • Hydrothermal Vent: area where HOT ocean water rises out of cracks in the ocean floor. • Only deep zone environment that supports a variety of ocean life. • Bacteria at the vents use chemo synthesis to produce their own food. (Producers of the vents.) • Organisms include: giant clams, tube worms, and crabs.