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Transcript of Neritic Zone
Brycen Moser, and Dylan Mangan Topography Features Flora Kelp forests occur in cold, nutrient-rich water and are among the most beautiful and biologically productive habitats in the marine environment. They are found throughout the world in shallow open coastal waters, and the larger forests are restricted to temperatures less than 20ºC. A dependence upon light for photosynthesis restricts them to clear shallow water and they are rarely much deeper than 15-40m. In southern California, the Macrocystis can grow 30 cm per day.
Coral reefs are widely distributed in warm shallow waters. They can be found as barriers along continents (e.g., the Great Barrier Reef off Australia), fringing islands, and atolls. Naturally, the dominant organisms in coral reefs are corals. Corals are interesting since they consist of both algae (zooanthellae) and tissues of animal polyp. Since reef waters tend to be nutritionally poor, corals obtain nutrients through the algae via photosynthesis and also by extending tentacles to obtain plankton from the water. Besides corals, the fauna include several species of microorganisms, invertebrates, fishes, sea urchins, octopuses, and sea stars.
Sea Anenome Sea Cucumber Sea Urchin Sea Sponge Eel Grass Sea Pen Fauna Salinity The average salinity of seawater is 35 parts per thousand. This is
written as 35ppt. That means that 35 units of salt are in every
thousand units of sea water. The range of salinity of sea water is
32-38ppt. Salinity refractometer Food Web Humans play a large role in the neritic food web because of fishing General Description The Neritic Zone begins at the shoreline and extends 200 meters out. The neritic zone stays on the continental shelf and doesn't exceed a depth of 660 feet. Where kids and surfers play in the ocean, down to where scuba divers go to check out coral reefs. Can absorb the light. It is not deep enough to escape the sunlight. Because of this, photosynthesis takes place in the Neritic Zone, allowing an abundance of plant life and nutrients, thanks to the amount of flora. Tides can also play a large role in the Neritic Zone. Different Types and Locations The neretic zone doesn't have any locations other than the shallow edges of continents. It shares a depth level, the epipelagic zone, with a farther out zone known as the oceanic providence. The neretic zone, despite being relitively small, contains two subzones. These are the Kelp forest and the Coral reef. So, though the neretic zone isn't very deep, it still contains alot of life. Water Movement Water constantly hits shores eroding the land. Land is constantly
rising. The moon changes tide via shifting of gravity. The water can
move calmly or violently depending on the seasons, moon, and the weather.
Also, it depends on the area where the particular neritic zone is. Substrate The bottom is covered in seaweed. There is low water pressure and the temperature is fairly stable. The penetration of light allows photosythisis to take place. Technology Study Acoustic Technology is used to study the neritic zone.
It allows us to "See" underwater. It uses waves to do this. Soundwaves are most commenly used. It uses the reflection of different objects (like fish and the underwater floor) to map out different locations. This is used for all sizes of fish and other life, as well as underwater constructs like coral reefs. Resources We get many fish for eating purposes from
the neritic zone. We also get fossils to study
and to make into fossil fuels. The neritic zone contains many nutrients as well. And if you have a gold fish or a pet like that, it too came from the neritic zone. Why is this Ecosystem important? If we didnt have this ecosystem, we wouldn't
be able to play at the beach! We would also lose a lot of pets and food as far as fish go. There wouldn't be nearly as much plant life in the ocean if the neritic wasn't real. It would be hard to imagine a beach trip without it. Pollution Pollution is very high in the Neritic
Zone because of the location. Since it is on the shoreline and out 200m,
it tends to pick up a lot of pollution from trash on the beach, leaking oil from boats, and trash that has been taken from the beach out to sea. The pollution endangers many animals from the Neritic Zone and it needs to be stopped. There are huge amounts of species in the neritic
zone. It is one of the most heavily populated parts
of the ocean. Many live within different habitats of
the Neritic zone. Such as in kelp forests, coral reefs,
or even something tiny like a sea anenome for clown
fish. Stingray Dolphin Giant Clam Reef Fish Banded Coral Shrimp Clown Fish