Marine Ecosystems 8th Grade Science, SWMS.

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Presentation transcript:

Marine Ecosystems 8th Grade Science, SWMS

Types of Organisms Organisms classified based on: Three types: How they move Where they live Three types: Benthos Plankton Nekton

Benthos Live on or near bottom of ocean Snails, Starfish Sometimes attached to ocean floor Kelp Forests, Sponges

Plankton Tiny organisms that move due to currents. Zooplankton- animal like. Example: Krill Phytoplankton- plant-like. Example-algae and diatoms.

Nekton Free-swimming Found in all layers of ocean Examples: Fish, Whales, Eels, Seals, etc.

Oceanic Zones Three different zones based on distance from shoreline. Intertidal Neritic Oceanic Each house different organisms! **1**

Intertidal Description: Shoreline area between high and low tide mark. Organisms: sea anemones, starfish, crabs, seaweed, barnacles, birds Adaptations: Need to be to survive at high tide and low tide. Be able to hang on and not get washed away by the waves. Characteristics of the water: Shallow.

Neritic Zone Description: gentle slope from the shore to the deeper ocean floor. Organisms: coral reefs, kelp forests, fish, algae, starfish, eels, clownfish, sea anemones, turtles Adaptations: Home to most life in the oceans. Characteristics: Fairly constant temperature, sunlight, and salinity. Ocean depth up to 200 feet.

Neretic Zone (coral reefs and kelp forests) First day nemo

Oceanic Zone Description: Deep open waters. Hydrothermal vents Organisms: whales, dolphins, sharks, squid, jellyfish, krill. Adaptations: Most live in top 200 meters of the surface. Characteristics: Sunlight only in the top 200 meters. High pressure and low temperatures below 200 meters. No sunlight and dark below 200 meters.

Oceanic Zone Angler attack Angler nemo

Hydrothermal Vents Seawater moves into ocean from cracks in Earth’s crust. High temperatures Chemosynthesis- bacteria use chemicals to make oxygen. Unique ocean life!

Challenger Descent Images Full length