Describe the effects of nitrogen and phosohorus fertiliser leaching into a lake

This will cause eutrophication. Under normal circumstances, nutrients are a limiting factor for algal growth. When the fertiliser leaches into the lake, the excess nutrients will therefore allow algae at the surface to grow and multiply rapidly in an algal bloom.The mass of alge block light from reaching the lake bed, preventing photosynthesis in the plants that grow there. Without the ability to photosynthesise, the plants die.The dead organic plant material is then decomposed by bacteria. The respiration of these bacteria uses up large quantities of oxygen, leaving too little to support large-bodied aquatic animals such as fish, which die off.

AR
Answered by Alasdair R. Biology tutor

3502 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What is the mitochondria and what is its role within the cell?


Describe the process of insulin secretion. (7 marks)


Not all mutations lead to changed in amino acid sequence of polypeptides. Explain why.


Explain what causes the conduction of impulses along a non-myelinated axon to be slower than along a myelinated axon.


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