1741294
Description
Mind Map by Katie Nunn, updated more than 1 year ago
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Created by Katie Nunn
almost 10 years ago
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AQA GCSE Biology B1.5 Energy in Biomass
- Pyramids of Biomass
- Radiation from the sun is the source of
energy for most communities of living
organisms
- Green plants and algae absorb a
small amount of light that reaches
them.
- Green plants
transfer the solar
energy to chemical
energy which is
then passed along
the food chain.
- This transfer occurs during photosynthesis
- The energy is stored in the substances that make up the cells of
the plant
- A pyramid of biomass represents
the mass of the organisms at each
stage in a food chain. +accurate
than pyramid of numbers
- e.g a bush may have insects feeding on it but the
mass of the bush would be far larger than the
mass of the insects and so the bush would be the
first thing in the pyramid
- The mass of each living material (biomass) at each stage
of the pyramid is less than that of the previous stage
- The biomass can be drawn to scale and as a pyramid
- The biomass can be drawn to scale and as a pyramid
- The mass of each living material (biomass) at each stage
of the pyramid is less than that of the previous stage
- e.g a bush may have insects feeding on it but the
mass of the bush would be far larger than the
mass of the insects and so the bush would be the
first thing in the pyramid
- A pyramid of biomass represents
the mass of the organisms at each
stage in a food chain. +accurate
than pyramid of numbers
- The energy is stored in the substances that make up the cells of
the plant
- This transfer occurs during photosynthesis
- Green plants
transfer the solar
energy to chemical
energy which is
then passed along
the food chain.
- Green plants and algae absorb a
small amount of light that reaches
them.
- Radiation from the sun is the source of
energy for most communities of living
organisms
- Energy Transfers
- There is wastage at each stage of a food chain
- The amounts of material and energy contained
in the biomass of organisms is reduced at each
successive stage in a food chain.
- This means that not all of the energy
that is taken in by an organism is
used for growth
- Not all food eaten can be digested and
so some energy is stored in faeces or in urea in
urine (waste materials)
- Some of the biomass (food) is used for respiration, which releases
energy for living processes, including movement, so the more
something moves, the more energy it uses and the less is available for
growth
- Animals need to keep a constant temperature, so energy
from the previous stage of the food chain is used to keep
the animal at its normal body temp
- Much of the energy which is released in
respiration is eventually released into the
surroundings.
- Much of the energy which is released in
respiration is eventually released into the
surroundings.
- Animals need to keep a constant temperature, so energy
from the previous stage of the food chain is used to keep
the animal at its normal body temp
- Some of the biomass (food) is used for respiration, which releases
energy for living processes, including movement, so the more
something moves, the more energy it uses and the less is available for
growth
- Not all food eaten can be digested and
so some energy is stored in faeces or in urea in
urine (waste materials)
- This means that not all of the energy
that is taken in by an organism is
used for growth
- The amounts of material and energy contained
in the biomass of organisms is reduced at each
successive stage in a food chain.
- There is wastage at each stage of a food chain
- Decay Processes
- Living organisms must remove materials from the environment for growth and other processes.
- These materials are eventually returned to the environment either in waste
materials or when the organisms dies or decays
- Materials decay because they are broken down
(digested) by micro-organisms.
- These mirco-organisms (bacteria and fungi) are called decomopsers and they work faster if they
are in a warm, moist aerobic conditions
- Many decomposers also need oxygen.
- The decay process releases substances that plants need to grow
- In a stable community the processes that remove materials are balanced by those that return materials. They are constantly recycled
- Humans can recycle waste in sewage plants and compost heaps
- Humans can recycle waste in sewage plants and compost heaps
- In a stable community the processes that remove materials are balanced by those that return materials. They are constantly recycled
- The decay process releases substances that plants need to grow
- Many decomposers also need oxygen.
- Detrius feeders e.g.
some worms start the
process of decay by
eating dead plants or
animals & producing
waste materials
- Decay organisms then break down the waste or dead plants and
animals
- Decay organisms then break down the waste or dead plants and
animals
- These mirco-organisms (bacteria and fungi) are called decomopsers and they work faster if they
are in a warm, moist aerobic conditions
- Materials decay because they are broken down
(digested) by micro-organisms.
- These materials are eventually returned to the environment either in waste
materials or when the organisms dies or decays
- Living organisms must remove materials from the environment for growth and other processes.
- The Carbon Cycle
- The constant cycling of carbon is called the carbon cycle.
- CO2 is removed from the
environment by green plants
and algae and is used for
photosynthesis
- carbon from CO2 is used to make
carbohydrates, fats & proteins which
make up the body of plants and algae
- When green plants
and algae respire
some of this carbon
becomes CO2 and is
released back into
the atmosphere
- When animals respire some
carbon become CO2 and is
released back into the
atmosphere
- When plants, animals and
algae die, some animals and
microorganisms feed on their
bodies. Carbon is released
into the atmosphere as
carbon dioxide when these
organsims respire
- Combustion of wood and fossil fuels release CO2 back into the atmosphere
- The cycle continues
- The cycle continues
- Combustion of wood and fossil fuels release CO2 back into the atmosphere
- When plants, animals and
algae die, some animals and
microorganisms feed on their
bodies. Carbon is released
into the atmosphere as
carbon dioxide when these
organsims respire
- When animals respire some
carbon become CO2 and is
released back into the
atmosphere
- When green plants
and algae respire
some of this carbon
becomes CO2 and is
released back into
the atmosphere
- carbon from CO2 is used to make
carbohydrates, fats & proteins which
make up the body of plants and algae
- The constant cycling of carbon is called the carbon cycle.
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