Dissolved organic carbon

Appears in 18 processs and 28 steps. Everything below is linked: open a process to see it in context.

Top processes

Decomposition

4 steps

Leaching of soluble compounds from litter
Fork: where does the carbon of decomposed litter end up?
Leached out as dissolved organic carbon
and 1 more in this process

Organic matter decomposition

2 steps

Mineral-associated organic matter (MAOM) formation

2 steps

Root exudate chemistry, fate and priming

2 steps

Bacteria and archaea

2 steps

Viral shunt: phage lysis recycles bacterial carbon and nitrogen

2 steps

Show 12 more processes

Microbial dormancy, the seed bank and reactivation after rewetting

2 steps

Mineral surface area, reactive metals and the saturation of mineral-associated carbon

2 steps

Soil gas exchange and redox

1 step

Iron redox cycling and the enzyme latch in wet soil

Iron redox cycling and the enzyme latch in wet soil

1 step

Dissolving oxides releases sorbed phosphate and organic carbon

Aggregate formation and pore structure

1 step

Freeze-thaw cycling and soil structure

Freeze-thaw cycling and soil structure

1 step

Thaw flush: lysed microbes and broken aggregates release carbon and N

Biochar and charcoal in soil

1 step

Surface oxidises, gaining carboxyl groups and CEC; pores adsorb water and nutrients

Microbial necromass pathway to stable organic matter

1 step

Dissolved necromass leaches or respired during decay

Living soil system

1 step

Soil export to rivers and ocean: sediment, dissolved carbon and nutrients

Soil export to rivers and ocean: sediment, dissolved carbon and nutrients

1 step

Drainage leaches dissolved organic carbon from organic horizons; rivers carry about 0.2-0.4 Gt C per year to the ocean

Peat accumulation and wetland methane

1 step

Methanogens in saturated peat convert acetate and H2 plus CO2 to Methane; production rises steeply with temperature (activation energy about 0.96 eV)

White-rot and brown-rot fungi: two routes to lignin and cellulose decay

1 step

Partly oxidized lignin fragments and fungal melanin enter the dissolved pool and can become humic precursors

Often found with

Water 13 Carbon dioxide 7 Soil microbes 6 Carbon 6 Iron oxides 5 Dissolved organic matter 4 Iron oxides 4 Drainage water 4 Mineral surfaces 3 Nitrogen 3 Soil organic matter 3 Rain 2

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