Cycles within ecosystems

The diagram shows the nitrogen cycle with pathways labelled $V$ , $W$ , $X$ , $Y$ , and $Z$ .

The nitrogen cycle with reservoirs of nitrogen in boxes and arrows representing processes V, W, X, Y, and Z.

Name the process labelled $X$ .

[1]

Give the letter of the process that converts nitrogen gas from the atmosphere into nitrogen compounds in the soil.

[1]

A freshwater lake situated near agricultural land and a town experiences a significant influx of dissolved ions.

Suggest two human activities that can increase the concentration of nitrates in this lake ecosystem.

[2]

Describe the consequences of an increase in nitrate concentration for this aquatic ecosystem.

[5]

Cycles within ecosystems Questions