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Ecosystems, niches and ecological sampling
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Ecological levels, habitat and niche

Ecological levels, habitat and niche

Nested diagram showing individual, population, community and ecosystem, with habitat labelled as the place where an organism lives and niche labelled as its role, resources, tolerances and interactions

Ecology looks at how organisms interact with each other and with their environment. The levels build up from an individual to a population, then a community, and finally an ecosystem, which includes the abiotic environment as well as the living community.

Ecosystems, niches and ecological sampling Lesson

  1. A Level
  2. /Biology
  3. /Ecosystems, niches and ecological sampling

Step-by-step lessons on Edexcel A A Level Biology Ecosystems, niches and ecological sampling. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons