why do swamps and bogs have low nitrogen levels?

Question

i need to know this for an assignment its a general 10th gr sci question

Answer 1

Soils naturally get most of their nitrogen from breakdown of rock, which are often transported in rivers and sheet overflow. Swamps and bogs are characterized by 1) deep stable sedimentation over bedrock, and 2) poor water circulation and low sediment influx. Biomass consumes nitrogen in water and sediment, and with swamps and bogs both having high biomass density, nitrogen levels drop and is not readily replaced.

Answer 2

The reason swamps and bogs have low nitrogen levels is that they have much vegetation such as trees, shrubs and all sorts of other plants. Plants use carbon and give off oxygen so if you have a lot of plants your going to have to have lots of carbon and there is going to be a lot of oxygen.