Please note that this resource contains two lessons worth of content.
Factors affecting food security and making food production efficient lesson created in accordance to the NEW AQA Specification (9-1). Designed for a higher ability class, although content can be adjusted to suit any ability. This lesson Includes powerpoint timers, slide animations, past paper questions, self-assessment, interactive mark scheme, embedded videos and review.
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AQA spec link: 4.7.5; 1, 2, 3
Relevant chapter: B18 Biodiversity and ecosystems. AQA Biology third edition textbook-Page 304-307
Students are required to know the following;
7.5.1 Students should be able to describe some
of the biological factors affecting levels of food security.
Food security is having enough food to feed a population.
Biological factors which are threatening food security include:
• the increasing birth rate has threatened food security in some countries
• changing diets in developed countries means scarce food resources are transported around the world
• new pests and pathogens affect farming
• environmental changes affect food production, such as widespread famine occurring in some countries if rains fail
• cost of agricultural inputs
• conflicts have arisen in some parts of the world over the availability of water or food.
Sustainable methods must be found to feed all people on Earth.
7.5.2 The efficiency of food production can be improved by restricting energy transfer from food animals to the environment. This can be done by limiting their movement and by controlling the temperature of their surroundings. Some animals are fed high protein foods to increase growth.
7.5.3 Fish stocks in the oceans are declining. It is important to maintain fish stocks at a level
where breeding continues or certain species may disappear altogether in some areas.
Control of net size and the introduction of fishing quotas play important roles in conservation of fish stocks at a sustainable level.