Presentation on theme: "Marine Ecosystems. Estuaries Estuaries are formed where ocean water mixes with fresh water These calm waters contain an abundance of Dissolved Oxygen,"— Presentation transcript:
Estuaries Estuaries are formed where ocean water mixes with fresh water These calm waters contain an abundance of Dissolved Oxygen, nutrients, and minerals supplied by the river water. Because of this, lots of fish love to live there
Intertidal Zone This is the area near the beach between high and low tide. Animals living in this area are adapted to living both underwater and exposed to air.
Intertidal Zone Organisms-write down a few examples
Play Intertidal Zone Video..\..\Videos\The Intertidal zone [www.keepvid.com].mp4..\..\Videos\The Intertidal zone [www.keepvid.com].mp4
Neritic Zone slopes down from the edge of the shoreline toward the ocean floor. a few meters to 200 meters. temperature and salinity remaining fairly constant in this zone MOST OF THE OCEAN LIFE IS FOUND HERE!
Coral Reef Corals are tiny organisms that live attached to each other in large groups called colonies As they die, their skeletons are left behind to create reefs. Become habitats for many fish
Real Nemo in Coral Reef Video..\..\Videos\Finding Nemo hiding in the live coral [www.keepvid.com].mp4..\..\Videos\Finding Nemo hiding in the live coral [www.keepvid.com].mp4
Oceanic Zone open waters of the ocean. from the ocean’s surface to its deepest waters, sunlight can only penetrates a few hundred meters Due to this, all producers (phytoplankton), live in this zone. Larger animals, such as whales and dolphins, live in this zone.
Abyssal Zone The floor of the deep ocean is called the abyss. High pressure, low temperature, and the absence of light Animals that live in this zone: worms, bacteria, sea urchins, etc. These organisms survive by eating organic material, like dead animals, that fall from the surface
Strangest fish on the planet live near the bottom-BUT NO FISH ON THE BOTTOM
Hidden Pollution Chemicals such as lead and mercury are widespread in the oceans Most dangerous chemicals are clear Some pregnant women who are highly susceptible to chemicals are advised not to eat fish or tuna. WHY?
Dead Zones Zones of the oceans where nothing survives because the currents have deposited these chemicals there
Where does most of the pollution enter the ocean? Run-off from land Urban run-off into rivers bring the pollution to the oceans and then travel in the ocean currents.
Discussion Questions Where are coral reefs and most of the ocean life located? a. in the oceanic zone b. in estuaries. c. in the intertidal zone d. in the neritic zone
Which of the following organisms could not live on the bottom of ocean floor of the oceanic zone? A. fish B. Sea urchins C. Bacteria D. worms
How do nutrients move in the ocean as a result of upwelling? A. from deep, colder areas to warm, shallow areas B. from warm, shallow areas to deep, colder areas. C. from the neritic zone to the intertidal zone D. from the ocean floor into estuaries