Table 1.
Summary of generalized linear model analysis of the Elodea experiment, describing the effect of temperature treatment, nutrient treatment and their interaction on the biomass, carbon:nutrient stoichiometry and elemental contents of Elodea nuttallii and nutrient concentrations.
| Chi-square values | ||||
|---|---|---|---|---|
| Unit | Temperature | Nutrients | Temperature × Nutrients | |
| BIOMASS VARIABLES | ||||
| Specific growth rate | day−1 | 16.7*** | 8.8* | 7.3 |
| Aboveground biomass | mg DW | 62.4*** | 17.7*** | 13.1 |
| Belowground biomass | mg DW | 10.8* | 18.6*** | 20.8* |
| CARBON:NUTRIENT STOICHIOMETRY | ||||
| Aboveground C:N | mol:mol | 43.6*** | 3.5 | 22.5** |
| Aboveground C:P | mol:mol | 7.7 | 45.6*** | 8.2 |
| Belowground C:N | mol:mol | 4.7 | 8.8* | 21.8** |
| Belowground C:P | mol:mol | 6.0 | 12.0** | 7.5 |
| ELEMENTAL CONTENTS | ||||
| Aboveground C | mol g DW−1 | 5.1 | 0.7 | 1.3 |
| Aboveground N | mol g DW−1 | 15.5** | 1.4 | 3.1 |
| Aboveground P | mol g DW−1 | 7.6 | 83.4*** | 45.7*** |
| Belowground C | mol g DW−1 | 9.4* | 35.2*** | 9.8 |
| Belowground N | mol g DW−1 | 7.4 | 0.9 | 14.3 |
| Belowground P | mol g DW−1 | 6.1 | 1.2 | 17.3* |
| NUTRIENT CONCENTRATIONS | ||||
| Pore water DIN | μM | 42.1*** | 163.9*** | 19.8* |
| Pore water DIP | μM | 47.9*** | 317.6*** | 29.3*** |
Significant results are indicated in bold, with
***
P < 0.001,
**
P < 0.01 and
*
P < 0.05.