Biology › Ecology, populations and environmental change

Ecology, populations and environmental change

Canonical unit B20

• Populations and their limits: what stops the numbers rising
  Population, community and habitat as separate terms; the sigmoid growth curve and its lag, log, slowing and stationary p…
• Nitrogen, phosphorus and the trouble with fertiliser
  Why nitrogen matters and why nitrogen gas is useless to plants; the four bacterial processes of the nitrogen cycle — nit…
• Succession: how bare rock becomes woodland, and why we stop it
  Primary and secondary succession; pioneer species and the changes they make to the abiotic environment; seral stages and…

Practical work that lands here

• Field sampling, distribution and behavioural response