Energy in ecosystem & Food Production

Key area 4 & 5

How much energy is passed on to an organism?

Only 10%

How much of the energy if lost?

90%

How is the energy is lost?

Heat

Movement

Indigested waste

how are nitrates dissolve?

In the soil water and adsorbed through the roots

What does nitrates produce?

Amino acids

What does nitrates synthesis into?

Into plant protein

What happen there is to much fertiliser?

it can leach into fresh water adding excess nitrates

What happens when algal populations increases?

Can cause algal bloom

What can algal bloom reduce?

Light levels reaching the water killing aquatic plants

Dead plants and algae can provide what?

Plenty food for bacteria

The more bacteria the more of what is used up?

Oxygen

Leaching can results in what?

Biodiversity decreasing

Why do farmers spray pesticides on to crops?

To increase crop yield by protecting the crops by killing pests