Presentation on theme: "ECOSYSTEMS OF THE OCEAN"— Presentation transcript:
1ECOSYSTEMS OF THE OCEAN SOL 5.6Biological Characteristics
2Physical Changes (Depth) TemperatureAmount of lightSalinityPressurePlant and animal life
3What is an ecosystem?An area made up of living organisms and the nonliving things in their environmentOrganisms in the ocean have adaptations to help them survive in their ecosystems.
4The ocean ecosystem is made up of three main zones The ocean ecosystem is made up of three main zones. These zones are based upon the amount of sunlight each zone receives.
5SUNLIT ZONE The smallest zone More than 90% of ocean organisms live hereReceives the most sunlight
6TWILIGHT ZONE Below the sunlit zone Very little sunlight Cold High pressureHigh salinityLess food (fewer animals)Green plants do not grow here
7MIDNIGHT ZONE Deepest part of the ocean Pitch black (no sunlight) FreezingGreatest amount of pressureGreater than any other place on the Earth’s surfaceCovers 90% of the ocean’s spaceLeast amount of ocean life
10PLANKTON Tiny organisms that float or drift within the water Two kinds PhytoplanktonLike plants (need warm temperatures and sunlight)Make food through photosynthesisMake most of the oxygen found on EarthZooplanktonTiny animals
11NEKTON Ocean animals that can swim or move freely in the ocean The largest portion of familiar animals found in the oceanLive at different depthsExamples include fish, octopus, whales, eels, and squid
12BENTHOS Plants and animals that live on the ocean floor of the ocean Some are attached to the floorExamples: sea stars, oysters, clams, sea cucumbers, and sea anemones
13FOOD WEBOrganisms in each zone affect other organisms in that zone and in other zones.
14FOOD CHAINPlants and phytoplankton are on the bottom of all food chains in the ocean.They make their own foodUse the sun’s energy and nutrients that are in the ocean
15FOOD CHAIN Zooplankton eat the phytoplankton and plants. Small fish eat the zooplankton.Large fish eat the small fish.When fish die, they sink. Decomposers eat their bodies. (Ex: sea slug, sea worm)Nutrients float back up into the water.Phytoplankton use these nutrients for photosynthesis.
16Some scientists describe the ocean ecosystem more as a web than a chain because many sea creatures eat more than one kind of creature, and some creatures eat others from their own group.
17OUR OCEAN ECOSYSTEMWithout plankton, all of the oceans animals would die.All animals in the ocean depend on plankton for survival.