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GCSE AQA Biology 3 Food Production
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GCSE AQA Biology 3 Food Production
Efficiency of food production can be improved by:
- Reducing the number of stages in the food chain
- Less energy/biomass as you move up food chain
- For area of land - can produce more food more humans by growing crops rather than having grazing animals
- People do need varied diet (demand for meat) & some land is unsuitable for growing crops
- For area of land - can produce more food more humans by growing crops rather than having grazing animals
- Less energy/biomass as you move up food chain
- Restricting energy lost by farm animals
- Animals often intensively farmed - kept close together indoors in small pens, they're warm & can't move about
- Saves them wasting energy on movement & stops them giving out energy as heat - makes transfer of energy from feed to animal more efficient
- Makes things cheaper for farmer & consumer
- Saves them wasting energy on movement & stops them giving out energy as heat - makes transfer of energy from feed to animal more efficient
- Animals often intensively farmed - kept close together indoors in small pens, they're warm & can't move about
- Developing new food sources like mycoprotein
- Mycoprotein: Protein from fungi (Fusarium is main source) - used to make meat substitutes for veg meals
- Grown in fermenters, using glucose syrup as food (obtained by digesting maize starch with enzymes)
- Fungus respires aerobically - with nitrogen (as ammonia)
- Important to prevent other microorganisms growing - fermenter initially sterilised, incoming nutrients heat sterilised & air supply is filtered
- Mycoprotein harvested & purified
- Important to prevent other microorganisms growing - fermenter initially sterilised, incoming nutrients heat sterilised & air supply is filtered
- Fungus respires aerobically - with nitrogen (as ammonia)
- Grown in fermenters, using glucose syrup as food (obtained by digesting maize starch with enzymes)
- Good in developing countries
- Mycoprotein: Protein from fungi (Fusarium is main source) - used to make meat substitutes for veg meals
- Reducing the number of stages in the food chain
Problems with efficient food production
- Some people think forcing animals to live in unnatural/uncomfortable conditions is cruel (growing demand for organic meat)
- Crowded conditions create favourable environment for spread of diseases
- To prevent disease - animals are given antibiotics
- When animals are eaten, antibiotics enter humans - allows microbes that infect humans to develop immunity
- Animals need to be kept warm - using power from fossil fuels
- Fish stocks are getting low but fish continues to feed animals that are intensively farmed
Food distribution causes problems
- Some foods have lots of 'food miles' - transported a long way
- Can be expensive & bad for environment
- Some foods have lots of 'food miles' - transported a long way
Overfishing is decreasing fish stocks
- Less fish for us to eat
- Need to maintain fish stocks at level where they continue to breed (sustainable food production)
- Can do this by:
- Fishing quotas - limits on number & size of fish (prevents certain species being overfished)
- Net size - different limits on mesh size of fish net (reduce no. of unwanted fish - help them escape)
- Can do this by:
Informações
- Descrição
- A mind map showing information about efficient food production, mycoprotein, problems with intensive farming and food distribution and fish stocks.
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- Lilac Potato
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