Ecosystems
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Ecosystems. What is an ecosystem? An ecosystem is a community of living organisms (plants and animals) sharing an environment. The largest ecosystems are called biomes. What is a biome? A biome is a very large ecosystem e.g. the tropical r ainforest. Simplified map to show world biomes.

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Ecosystems

Ecosystems

What is an ecosystem?An ecosystem is a community of living organisms (plants and animals) sharing an environment.

The largest ecosystems are called biomes.

What is a biome? A biome is a very large ecosystem e.g. the tropical rainforest.


Simplified map to show world biomes

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DESCRIBE the distribution of world biomes.

EXPLAIN their distribution.


Inputs, stores and outputs of an ecosystem

precipitation

biomass

transpiration

photosynthesis

stores

outputs

Animals migrating into the area

Inputs

Animals migrating out

water

Soil weathering

drainage

Rock weathering

carbon



Energy transfer loss
Energy Transfer & Loss

  • Energy enters the ecosystem as visible light,

  • Transfers to chemical potential, to kinetic, to heat,

  • Loss from system as heat or infrared radiation.


Energy flow in an ecosystem

The sun is the source of all energy for all life on earth.

The initial process in energy flow is that of photosynthesis where light energy from the sun is trapped by green plants and turned into chemical energy, which can then be used for plant growth.

Energy is then passed along through the ecosystem as food in a food chain or in a more complex food web.


An ecosystem is also made up of different groups of producers and consumers and decomposers. From the plants providing food to the bacteria breaking down the DOM

omnivores

Autotrophs: create their own food supply e.g. plants

detritivores


How does energy move through an ecosystem? producers and consumers and decomposers. From the plants providing food to the bacteria breaking down the DOM


Label the autotrophs (producers), herbivores, carnivores omnivores and decomposers in this food web.


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