TABLE 2.
The soil biomarker compounds identified from biomarker analysis across all soil fractions of fPOM, oPOM, and MAOM
| Origin | Classes | Compounds | Origin | Classes | Compounds |
|---|---|---|---|---|---|
| Plant derived | LFA | n‐Docosanoic acid | Plant‐derived | Suberin | α,ω‐Hexadecanedioic acid |
| n‐Tetracosanoic acid | α,ω‐Octadecanedioic acid | ||||
| n‐Hexacosanoic acid | α,ω‐Docosanedioic acid | ||||
| n‐Docosanol | 20‐Hydroxyicosanoic acid | ||||
| n‐Tricosanol | 22‐Hydroxydocosanoic acid | ||||
| n‐Tetracosanol | 24‐Hydroxytetracosanoic acid | ||||
| n‐Hexacosanol | 26‐Hydroxyhexacosanoic acid | ||||
| Octacosanol | Cutin | Hydroxyhexadecanoic acid | |||
| Triacontanol | 9,10‐Dihydroxyoctadecanoic acid | ||||
| Nonacosane | Microbial‐derived | SFA | n‐Dodecanoic acid | ||
| Hentriacontane | n‐Tetradecanoic acid | ||||
| Heptacosanoic acid | n‐Pentadecanoic acid | ||||
| Octacosanoic acid | n‐Hexadecenoic acid (16:1) | ||||
| Triacontanoic acid | n‐Heptadecanoic acid | ||||
| Lignin | p‐hydroxybenzaldehyde | n‐Octadecenoic acid (18:1) | |||
| p‐hydroxyacetophenone | Amino sugar | Muramic acid | |||
| Vanillin | Glucosamine | ||||
| Acetovanillone | Galactosamine | ||||
| p‐hydroxybenzoic acid | Others | n‐Eicosanoic acid | |||
| Syringaldehyde | Pentadecanol | ||||
| Vanillic acid | Hexadecanol | ||||
| Acetosyringone | Octadecanol | ||||
| 3,5‐dihydroxy‐benzoic acid | n‐Eicosanol | ||||
| Syringic acid | α,ω‐Nonanedioic acid | ||||
| p‐coumaric acid | Nonadecanoic acid | ||||
| Ferulic acid | Heneicosanoic acid | ||||
Note: Amino sugars were not extracted from the fPOM fraction due to the low mass recovery of fPOM.
Abbreviations: fPOM, free particulate organic matter; LFA, long‐chain fatty acids; MAOM, mineral‐associated organic matter; oPOM, occluded particulate organic matter; SFA, short‐chain fatty acids.