How does eutrophication work?

  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. 
IH
Answered by Iona H. Biology tutor

3844 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Describe how the RER is involved in the production of enzymes. [2 marks] June 2014


Describe action potential and how it allows for signals to be transmitted along neurons.


What is the definition of a pathogen and give two examples. (3 marks)


Draw a diagram of a human cell, include; the Nucleus, the Golgi Apparatus, Lysosomes, Ribosomes and Mitochondria, annotating your diagram with the general functions of each component and of the cell membrane.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences