Table 1.
Nonlinear boundary values, parameter estimate ± standard error (SE), from comparisons between surface area, maximum (max.) depth, and emergent vegetation (veg.) cover and ecosystem structure/function metrics including gross primary production (GPP), total phosphorus concentrations (TP), methane fluxes (CH4 flux), respiration (R), net ecosystem production (NEP), chlorophyll a concentrations (Chl a), pH, total nitrogen concentrations (TN), diel temperature ranges (DTR), and gas transfer piston velocity (k600).
| Ecosystem metric | Surface area Boundary est. ± SE (ha) |
Max. depth Boundary est. ± SE (m) |
Emergent veg. cover Boundary est. ± SE (%) |
|---|---|---|---|
| GPP | NA | – | – |
| TP | 0.8 ± 1.2 | 2.1 ± 1.2 | 8.2 ± 1.2 |
| NEP | 1.0 ± 1.4 | – | – |
| CH4 flux | 1.1 ± 1.7 | NA | – |
| R | 1.2 ± 1.5 | – | – |
| Chl a | 1.5 ± 1.7 | 14.9 ± 1.2 | NA |
| pH | 1.7 ± 1.5 | 1.0 ± 1.4 | 26.0 ± 1.3 |
| TN | 3.8 ± 1.4 | 5.2 ± 1.4 | 6.0 ± 1.3 |
| DTR | 4.6 ± 1.3 | 5.9 ± 1.3 | – |
| k600 | 17.5 ± 1.5 | – | – |
| Mean | 3.7 ± 1.8 | 5.8 ± 2.5 | 13.4 ± 6.3 |
| Median | 1.5 | 5.2 | 8.2 |
Boundary estimates are included if the nonlinear models (segmented regression or logistic relationships) were selected as optimal fits with standard error as determined when fitting the parameter. NA indicates a null or linear fit, – indicates not enough data was available to perform the analysis.