No evidence of an allelopathic effect of Eurasian watermilfoil ( <i>Myriophyllum spicatum</i> ) on cyanobacteria in two Canadian Lakes
Bibliographic record
Abstract
Eurasian watermilfoil (Myriophyllum spicatum) is an exotic vascular plant in North America and highly invasive in lacustrine environments. This plant forms dense, extensive beds that can interfere with recreational activities. Eurasian watermilfoil has been shown in laboratory experiments to cause mortality or low growth rates to several species of cyanobacteria, because of allelopathic molecules (fatty acids, polyphenols) released into the water by the plant. The allelopathic effect of Eurasian watermilfoil has never been studied in a natural setting. The main objective of this study was to verify whether a causal link between Eurasian watermilfoil and cyanobacteria could be established in two infested lakes of southern Québec, Canada. Some fatty acids or polyphenols (ellagic, nonanoic, octadecenoic and oleic acids) were detected in summer and autumn in the water, but in concentrations well below (30 to 35,000 times lower) the theoretical concentrations at which they reduce the growth of cyanobacteria. There was no evidence of allelopathic effects of Eurasian watermilfoil on the cyanobacterial assemblages. Other chemical and physical factors likely had greater influences on cyanobacterial assemblage composition than Eurasian watermilfoil, notably phosphorus concentration and water temperature. However, some cyanobacterial species known to be influenced by Eurasian watermilfoil, in particular Microcystis aeruginosa, were not specifically identified in this study, so caution must be exercised before concluding that there is no allelopathic effect.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".