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Life in the Ocean
Transcript of Life in the Ocean
The area between the land and sea that is covered by water at high tide and uncovered at low tide. Neritic Zone - Water here becomes deeper but still recieves a lot of sunlight. Many plants live here. Oceanic Zone - The sea floor drops sharply here. This region has characteristic life-forms and geography. Benthic Zone - This is the ocean floor.
The deepest parts do not get any sunlight. Which animals lives in
which Zones? Intertidal -
sea grosses > periwinkel snails >
anemones > crabs > conchs > Neritic -
Plankton > seaweeds > corals >
sea turtles > dophins Benthic -
bacteria > worms > sea urchins Oceanic -
Whales > squids >
jellyfish > sharks a small mountain rising several hundred fathoms above the floor of the sea but having its summit well below the surface of the water. that part of the earth's crust that rises above the oceans and is composed of sialic rocks. the part of a continent that is submerged in relatively shallow sea. What organisms live in the ocean? Plankton- Organisms that float or drift freely near the oceans surface. Most are microscopic. They are divided into 2 groups:
Animal-like (Zooplankton) Nekton- Organisms that swim actively in the open ocean.
Ex. Mammals such as whales, dolphins, and sea lions, as well as many varieties of fish Benthos- Organisms that live on or in the ocean floor
Ex - Crabs, starfish, worms, coral,sponges, seaweed, and clams Marine Ecosystems Mangrove swamps- Swamps along the coast of tropical areas. Mangrove trees help protect the coastline from erosion and reduce the damage from tropical storms. Mangrove swamps also provide breeding and feeding areas for many different types of organisms. Polar ice-The Arctic ocean and the ocean around antarctica make up another marine ecosystem. These icy waters located at the North and South poles are rich in nutrients. Estuaries- An area where fresh water from streams and rivers spills into the ocean. In estuaries, the fresh water from rivers and the salt water from the ocean are always mixing. The fresh water that spills into an estuary from a river is rich in nutrients. Interconnected food webs: Aquatic and terrestrial food webs are interconnected. Terrestrial organic matter, carbon, helps support growth of invertebrates and fish.
Ex. A frog may eat a fly on land, but then be eaten by a snake in water Places where the Earth's tectonic plates are gradually moving apart, and as they do, magma rises up to fill the gap, sometimes leading to submarine volcanic eruptions. a large, flat, almost level area of the deep-ocean basin a long, narrow, and steep depression on the ocean floor. It forms when one tectonic plate subducts beneath another plate. Coral Reefs They are found in mostly warm shallow areas of the nertic zone. Corals live in large groups and when they die, they leave their skeleton behind. New corals grow on the remain skeletons. Over time, the corals grow and form a reef. Many marine animals live here in the coral reefs. The End!! By: Olympia Ho