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Marine Ecosystems
EstuariesEstuaries are formed where ocean water
mixes with fresh waterThese 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
Salt Marsh-Part of an estuaryProvide a habitat for fish
Ocean EcosystemsThere are 4 distinct life zones in the ocean in
relationship to the beach.Each life zone differs in physical conditions.
Life ZonesOpen Ocean-
Intertidal ZoneThis 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
Neritic Zoneslopes 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 zoneMOST 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
Coral Reef
Real Nemo in Coral Reef Video..\..\Videos\Finding Nemo hiding in the live co
ral [www.keepvid.com].mp4
Oceanic Zoneopen waters of the ocean. from the ocean’s surface to its deepest
waters,sunlight can only penetrates a few hundred
metersDue to this, all producers (phytoplankton),
live in this zone.Larger animals, such as whales and dolphins,
live in this zone.
Open Ocean Zone (Oceanic)
Oceanic Zone
Abyssal ZoneThe 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
Play Abyss Video..\..\Videos\abyss fish.mp4
Photic Zone vs Benthic ZonePhotic zone- sun light reaches ~200 meters
Ocean Pollution - What is the most common solid waste in oceans?Plastic
Never biodegrades Animals mistake it for foodVery buoyant and floats along with the ocean currents
Bird carcass that died from eating plastic in ocean.
Sea of plastic
Hidden PollutionChemicals such as lead and mercury are
widespread in the oceansMost dangerous chemicals are clearSome pregnant women who are highly
susceptible to chemicals are advised not to eat fish or tuna. WHY?
Dead ZonesZones 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 landUrban run-off into rivers bring the pollution
to the oceans and then travel in the ocean currents.
What is the largest polluter of the oceans?
Discussion QuestionsWhere are coral reefs and most of the ocean
life located? a. in the oceanic zone
b. in estuaries.c. in the intertidal zoned. 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. BacteriaD. worms
How do nutrients move in the ocean as a result of upwelling?A. from deep, colder areas to warm, shallow
areasB. from warm, shallow areas to deep, colder
areas.C. from the neritic zone to the intertidal zoneD. from the ocean floor into estuaries