| to the environment | 10 | transitive-object |
| as primary producers in aquatic ecosystems | 8 | other |
| to life on earth | 7 | transitive-object |
| algae → be → important | 23 |
| algae → be → essential | 11 |
| algae → be → vital | 8 |
| algae → be → crucial | 5 |
| algae → be → critical | 5 |
| negative | neutral | positive |
| 0.066 | 0.502 | 0.432 |
| Raw frequency | 52 |
| Normalized frequency | 0.705 |
| Modifier score | 0.500 |
| Perplexity | 165.402 |