Energy transfer

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  • Created by: Sopha8
  • Created on: 16-11-14 11:47
What is the equation for net productivty?
NET PRODUCTIVITY (amount of energy avalible to next trophic level)= GROSS PRODUCTIVITY (energy avalible that organsims absorb) - RESPIRATORY LOSS (e.g movement)
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What is the formual for efficiency of energy transfer?
% effieciency=net productivity for trophic level / net producitivity for previous trophic level X 100
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Pyramids of energy and biomass are measured in what units?
energy = KJM Yr biomass= KgM
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How does intensive farming increase net producitvity? give examples
1-removing growth limiting factors e.g pesticides/biological agents for removing pests, for livestock resitricting movement and 2- increase energy input e.g fertilisers for more nutirients, irrigation, greenhouse for warmth and right CO2 levels
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Define Eutrophication
nitrients build up in water from fertisiers causes algeo to grow which blocks out light so plants die as they cant photosynthesise. this drecreaes oxygen content in water so aqautic organisms cant respire so die
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what happens to efficiency of energy transfer up a food chain?
increases as more digestible material in aminals than plants (the producers)
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Card 2

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What is the formual for efficiency of energy transfer?

Back

% effieciency=net productivity for trophic level / net producitivity for previous trophic level X 100

Card 3

Front

Pyramids of energy and biomass are measured in what units?

Back

Preview of the front of card 3

Card 4

Front

How does intensive farming increase net producitvity? give examples

Back

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Card 5

Front

Define Eutrophication

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