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9.1 Ecosystems and interdependence
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From organism to ecosystem

From organism to ecosystem

Ecological levels showing one rabbit as an organism, several rabbits as a population, rabbits with foxes and grass as a community, and the same living community with sunlight, water, air and soil as an ecosystem Ecology studies how living organisms interact with each other and with their environment. The basic scale is organism, then population, then community, then ecosystem.

9.1 Ecosystems and interdependence Lesson

  1. GCSE
  2. /Biology
  3. /9.1 Ecosystems and interdependence

Step-by-step lessons covering Edexcel GCSE Biology 9.1 Ecosystems and interdependence for Foundation and Higher tier. Each lesson breaks down 9.1.1 Levels of organisation in ecosystems, 9.1.2 Abiotic and biotic factors, 9.1.3 Importance of interdependence, 9.1.4 Parasitism and mutualism, and 9.1.5 Determining number of organisms in an area, then works through exam-style questions in Paper 1 and Paper 2 format. Start with the foundational topics and build up to the higher-tier material.