How does eutrophication work?

  • Google+ icon
  • LinkedIn icon
  • 743 views

1. Fertilisers containing nitrogen are washed from fields to rivers and ponds. 

2. This effectively fertilises the algae in the pond causing an 'algal bloom'. 

3. The layer of algae on the surface stops sunlight from getting to the plants below. This means they cannot photosynthesize to produce oxgen.

4. The plants die which further depletes the oxgen in the water as the bacteria decomposing them use oxygen. 

5. The low oxygen levels cause fish and other organims in the water to die. 

Iona H. IB Biology tutor, GCSE Biology tutor, A Level Biology tutor, ...

About the author

is an online A Level Biology tutor with MyTutor studying at Bristol University

Still stuck? Get one-to-one help from a personally interviewed subject specialist.

95% of our customers rate us

Browse tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok