Presentation on theme: "Marine Ecosystems 8 th Grade Science, SWMS. Types of Organisms Organisms classified based on: – How they move – Where they live Three types: – Benthos."— Presentation transcript:
Marine Ecosystems 8 th Grade Science, SWMS
Types of Organisms Organisms classified based on: – 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 ZoneNeretic Zone (coral reefs and kelp forests) nemo Coral reef First day
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 nemo Angler attackAngler
Hydrothermal Vents Seawater moves into ocean from cracks in Earth’s crust. High temperatures Chemosynthesis- bacteria use chemicals to make oxygen. Unique ocean life!