Sulphur cycle

S uses

• 2 amino acids

• electron acceptor

• industrial

S inputs

• fossil fuel combustion

• volcanic eruptions

S depositions

• dry

• wet (acid rain)

• organic (biomass)

• sedimentation

S assimilated by?

microorganisms

S components

• atmospheric S

• organic S

• elemental S

• mineral S

• sulphate

S inputs to soil

• fertilisers

• atmospheric deposition

• plant residues

• animal manure

S losses from soil

• leaching

• runoff & erosion

• volatilisation

• crop harvest

• plant uptake

S aerobic or anoxic electron acceptor?

anoxic

S units

terra grams

S atmosphere → ocean

wet deposition

S ocean → soil

sedimentation & burial

S soil < - > biomass

plant uptake & decomposition

S biomass → atmosphere

burning biomass

S soil → atmosphere

volcanic eruptions & anthropogenic emissions

S atmosphere → soil

wet & dry deposition