TABLE 2.
Carbon transfer between donor and recipient trees. Carbon excess was calculated using Equations (2), (3), (4), (5), (6), (7), (8), and the % of donor carbon in recipients was calculated by the mixing model in Equation 9
| Donor | Recipient | Mycorrhizal group | Days post labelling | Shared mycorrhizal ASVs | δ13C in recipient (‰) | Carbon excess (mg) | Donor carbon (%) |
|---|---|---|---|---|---|---|---|
| Quercus | Pinus | EM | 42 | 137 | –16.66 | 0.22 | 6.51 |
| Quercus | Cupressus | EM +AM | 240 | 57 | –19.836 | 0.19 | 15.09 |
| Quercus | Pistacia | EM +AM | 15 | 103 | –21.35 | 0.07 | 27.12 |
| Ceratonia | Cupressus | AM | 240 | 73 | –20.75 | 0.28 | 4.41 |
| Ceratonia | Ceratonia | AM | 240 | 130 | –19.419 | 0.01 | 6.35 |
| Ceratonia | Pistacia | AM | 56 | 45 | –1.818 | 0.21 | 29.01 |
| Cupressus | Cupressus | AM | 2 | 52 | 35.195 | 0.37 | 118.88 |
| Cupressus | Pistacia | AM | 1 | 40 | 6.147 | 1.28 | 62.87 |
| Pinus | Pinus | EM | 56 | 300 | 16.762 | 0.04 | 13.38 |
Abbreviations: AM, arbuscular mycorrhizal; EM, ectomycorrhizal.