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Table 2
Results of the linear mixed effects (LME) analysis showing the effects of treatment, time and theirs interaction on physical-chemical, functional and structural endpoints along the experiment. Litter decomposition was analyzed only at the end of the experiment (D49). Bold values indicate significant effects (p < 0.05).
| Endpoint | Treatment | Time | Treatment × time |
|---|---|---|---|
| Physical-chemical | |||
| Temperature (C) | p = 0.845 | p < 0.001 | p = 0.993 |
| pH | p = 0.547 | p < 0.001 | p = 0.172 |
| Conductivity (μS/cm) | p = 0.090 | p < 0.001 | p = 0.070 |
| % DO | p = 0.749 | p < 0.001 | p = 0.070 |
| O2 (mg L−1) | p = 0.584 | p < 0.001 | p = 0.437 |
| Alkalinity | p = 0.468 | p < 0.001 | p = 0.177 |
| Functional | |||
| Oxygen production (mg O2 h−1) | p = 0.412 | p < 0.001 | p = 0.143 |
| Litter Decomposition | p = 0.466 | – | – |
| Structural – phytoplankton | |||
| Total phytoplankton abundance (cell L−1) | p = 0.439 | p = 0.031 | p = 0.374 |
| Total phytoplankton biovolumen (μm3) | p = 0.186 | p = 0.001 | p = 0.680 |
| Picophytoplankton (cell L−1) | p = 0.175 | p < 0.001 | p = 0.637 |
| Ultraphytoplankton (cell L−1) | p = 0.972 | p = 0.006 | p = 0.882 |
| Nanophytoplankton (cell L−1) | p = 0.210 | p = 0.007 | p = 0.457 |
| Microphytoplankton (cell L−1) | p = 0.268 | p = 0.012 | p = 0.393 |
| Chl-a (µg L−1) | p = 0.016 | p < 0.001 | p = 0.196 |
| Structural – zooplankton | |||
| Total Zooplankton (ind L−1) | p = 0.013 | p < 0.001 | p < 0.001 |
| Rotifera (ind L−1) | p = 0.066 | p < 0.001 | p < 0.001 |
| Cyclopoida copepods (ind L−1) | p = 0.172 | p < 0.001 | p = 0.546 |
| Calanoida copepods (ind L−1) | p = 0.498 | p < 0.001 | p = 0.271 |
| Nauplii (ind L−1) | p = 0.461 | p < 0.001 | p = 0.086 |
| Ceriodaphnia reticulata (ind L−1) | p = 0.545 | p = 0.002 | p = 0.766 |
| Macrothrix hirsuticornis (ind L−1) | p = 0.335 | p < 0.001 | p = 0.275 |
| Alona sp. (ind L−1) | p = 0.071 | p < 0.001 | p = 0.017 |
| Ostracoda (ind L−1) | p = 0.598 | p < 0.001 | p = 0.422 |
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