Search / resource
Resource: used or used up in processesSoil organic matter
Appears in 61 processs and 133 steps. Everything below is linked: open a process to see it in context.
Top processes
Living soil system
9 stepsShow 55 more processes
Soil formation
4 stepsSoil gas exchange and redox
4 steps- Cold, waterlogged soils preserve about 1,300 Gt of organic carbon because decomposition is frozen out
- Microbes decompose the thawed carbon; well-drained thaw releases mostly Carbon dioxide, saturated thaw ponds release Methane
- Under high emissions about 5-15% of permafrost carbon is released as greenhouse gas by 2100, with decades-to-centuries continuing
- and 1 more in this process
- Worms ingest soil, litter and microbes; gut mucus (water-soluble, energy-rich) stimulates microbial activity during transit
- Casts age, dry and harden; microaggregates inside casts protect organic carbon for months to years
- Mucus-lined burrow walls (drilosphere, a rim of a few millimetres) carry more microbial biomass, carbon and nitrogen than bulk soil
Decomposition
3 stepsSoil fauna
2 stepsSoil sulfur cycling
1 stepOften found with
Soil organic matter 33Carbon 33Soil microbes 29Nitrogen 25Water 22Carbon dioxide 20Clay minerals 17Plant roots 14Soil 14Clay minerals 13Earthworms 12Soil fauna 9
Known by 719 participants and resources across the map.