GCSE AQA Biology 3 Food Production

Lilac Potato
Mind Map by Lilac Potato, updated more than 1 year ago
Lilac Potato
Created by Lilac Potato about 6 years ago
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A mind map showing information about efficient food production, mycoprotein, problems with intensive farming and food distribution and fish stocks.

Resource summary

GCSE AQA Biology 3 Food Production
  1. Efficiency of food production can be improved by:
    1. Reducing the number of stages in the food chain
      1. Less energy/biomass as you move up food chain
        1. For area of land - can produce more food more humans by growing crops rather than having grazing animals
          1. People do need varied diet (demand for meat) & some land is unsuitable for growing crops
      2. Restricting energy lost by farm animals
        1. Animals often intensively farmed - kept close together indoors in small pens, they're warm & can't move about
          1. Saves them wasting energy on movement & stops them giving out energy as heat - makes transfer of energy from feed to animal more efficient
            1. Makes things cheaper for farmer & consumer
        2. Developing new food sources like mycoprotein
          1. Mycoprotein: Protein from fungi (Fusarium is main source) - used to make meat substitutes for veg meals
            1. Grown in fermenters, using glucose syrup as food (obtained by digesting maize starch with enzymes)
              1. Fungus respires aerobically - with nitrogen (as ammonia)
                1. Important to prevent other microorganisms growing - fermenter initially sterilised, incoming nutrients heat sterilised & air supply is filtered
                  1. Mycoprotein harvested & purified
            2. Good in developing countries
          2. Problems with efficient food production
            1. Some people think forcing animals to live in unnatural/uncomfortable conditions is cruel (growing demand for organic meat)
              1. Crowded conditions create favourable environment for spread of diseases
                1. To prevent disease - animals are given antibiotics

                  Annotations:

                  • When animals are eaten, antibiotics enter humans - allows microbes that infect humans to develop immunity
                  1. Animals need to be kept warm - using power from fossil fuels
                    1. Fish stocks are getting low but fish continues to feed animals that are intensively farmed
                    2. Food distribution causes problems
                      1. Some foods have lots of 'food miles' - transported a long way
                        1. Can be expensive & bad for environment
                      2. Overfishing is decreasing fish stocks
                        1. Less fish for us to eat
                          1. Need to maintain fish stocks at level where they continue to breed (sustainable food production)
                            1. Can do this by:
                              1. Fishing quotas - limits on number & size of fish (prevents certain species being overfished)
                                1. Net size - different limits on mesh size of fish net (reduce no. of unwanted fish - help them escape)
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