## 2 Materials and Methods
### DIMONA Platform and Model
#### 2.1.2. DIMONA Process-Based (PB) Model
For each simulated plant species, _DIMONA_ maintains pools of C (Equations (S2.2.1.1), (S2.3.1.1) and (S2.4.1.1)), nitrogen, N (Equations (S2.2.1.2), (S2.3.1.2) and (S2.4.1.2)), and phosphorus, P (Equations (2.2.1.3), (S2.3.1.3) and (S2.4.1.3)), with structural and non-structural components for the three main plant components in the model, i.e., leaves, stems (with branches), and roots (including fine roots)/rhizoids. Simulated plant growth and litterfall are driven by the balance between maintenance and growth respiration, as simulated plant growth is constrained by ambient photosynthetic C (photosynthate), N and P nutrient uptake, and plant water status. Thus, the growth of leaves, stems, and roots/rhizoids occurs in the model if R\({}_{l}\), R\({}_{b}\), and R\({}_{r}\) are >maintenance respiration in leaves, stems, and roots/rhizoids (Equations (S2.2.2.1), (S2.3.2.1) and (S2.4.2.1)), which determines the growth respiration of leaves, stems, and roots/rhizoids (Equations (S2.2.2.2), (S2.3.2.2) and (S2.4.2.2)). Growth respiration causes an increment in leaves', stems', and roots/rhizoids' structural C pools via the corresponding growth yields (Equations (S2.2.2.3), (S2.3.2.3) and (S2.4.2.3)). The simulated litterfall of leaves, stems, and roots/rhizoids, respectively, occurs if R\({}_{l}\), R\({}_{b}\), and R\({}_{r}\) are \(\leq\) to the maintenance respiration of leaves, stems, and roots/rhizoids, which determines zero growth respiration resulting in a decrement in leaves', stems', and roots/rhizoids' structural C pools (Equations (S2.2.3.2), (S2.3.3.2) and (S2.4.3.2)). Simulated leaf senescence (no deciduous species are simulated in this study) is driven by a plant phenology module (Equation (S2.2.4.1)). Thus, updates of structural and non-structural C, N, and P pools occur in the model at each time step. Water Control on Plant Processes  
The modifier for the effect of soil water availability on the photosynthesis of vascular plants, f\({}_{P}\) (Equation (S4.1.1.1)), constituting non-stomatal control on modelled photosynthesis (Equations (S1.1.1.6) and (S1.1.4.1)) is formulated as  
\[\mathrm{f}_{P}=\mathrm{f}_{\mathrm{gW}} \tag{1a}\]where \(f_{\rm{GW}}\) represents soil water availability (d. Soil Water and Air Availability to Plants). Thus, the ambient effect of soil water availability on photosynthesis, \(f_{\rm{GP}}\), is calculated as the minimum of the effect of soil water availability on plant photosynthesis, \(f_{\rm{P}}\), and unity  
\[f_{\rm{GP}}=\min\{1;\ f_{\rm{P}}\} \tag{1b}\]  
thereby reflecting no hydrology constraints on photosynthesis at or above field capacity. The modifiers for the effect of soil water and air availability on plant productivity and growth for vascular plants and bryophytes are presented below. The effect of soil water and air availability on vascular plant growth, \(f_{\rm{0}}\) (Equation (S4.2.1.1a,b), is formulated as  
\[f_{\rm{0}}=\frac{f_{\rm{0R}}^{0.001}f_{\rm{GW}}^{1.8}+f_{\rm{0A}}f_{\rm{0W}}}{1 +f_{\rm{0A}}}\quad\text{if }\overline{\theta}>\overline{\theta}_{\rm{FC}} \tag{2a}\] \[f_{\rm{0}}=\frac{f_{\rm{0R}}^{1.2}f_{\rm{0W}}^{0.5}+f_{\rm{0A}}f_{\rm{0W}}}{1 +f_{\rm{0A}}}\quad\text{if }\overline{\theta}\ \leq\ \overline{\theta}_{\rm{FC}} \tag{2b}\]  
where \(f_{\rm{0W}}\) is as defined above, \(f_{\rm{0R}}\) is the soil air availability to roots (d. Soil Water and Air Availability to Plants), and \(f_{\rm{0A}}\) is the effect of air availability on plant growth, root respiration, and nutrient uptake from the adaptations (if any) that a given vascular species may have for wetland soil conditions (e. The Effect of Air Availability on Plants from Adaptations to Wetland Soil Conditions). This effect may be due to adaptations such as enhanced rooting above the WT or genetic/inherent abilities to develop aerenchyma in stem and root tissues, grow adventitious roots above the waterlogged soil, or develop a rhizosphere oxygenation layer, etc., as outlined in the Supplementary Material.