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492705
Energy transfer...
Description
A-level BIOL4 Mind Map on Energy transfer..., created by prettypriyaz on 19/01/2014.
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biol4
biol4
a-level
Mind Map by
prettypriyaz
, updated more than 1 year ago
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Created by
prettypriyaz
over 10 years ago
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Resource summary
Energy transfer...
Around 2% of light energy is transferred from the Sun.
Some energy are reflected back in to the surface by the leaves.
Not all wavelength of light can be absorbed and used for photosynthesis.
Not all the light hits the chlorophyll molecule
10% of energy is transferred between each trophic level
Not all the food are digested
Lost in Faeces
Heat loss via respiration
losses are high in mammals, they have higher temperature
Much energy is needed to maintain the body temperature
Food chain
First trophic level is Producers
Herbivores are animals that eat plants
Carnivores are animal that consume other animals.
Decomposers
Detritovers
Primary consumers
Arrow shows the direction of energy transfer
Each stage in the food chain is referred to as trophic level
describes a feeding relationship in which the producers are eaten by primary consumers.
Many food chains are interlinked to make food webs.
Complexity
No more than 5 species- energy is lost at each level
Only limited amount of energy is available for the next trophic level
Pyramids...
Pyramid of Energy
Actual representation of the data
KJ^m-2 year^-1
Always in the same format
Pyramid of numbers
is the number of organisms of each trophic level in the food chain
No. of individuals can be so great, so it is impossible to represent them in the same food chain.
Width of bars- log scale
Pyramids of biomass
dry mass by killing the organism
Biomass is the mass of living material.
Seasonal difference in marine ecosystem is apparent.
g^m-2
Media attachments
images__7_ (image/jpg)
food_pyramid.gif (image/gif)
pyramid_of_numbers1.gif (image/gif)
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