Plant community response to operational use of glyphosate for conifer release
Bibliographic record
Abstract
Glyphosate (N-(phosphonomethyl) glycine) is the active ingredient in many commercially used herbicide formulations. Primarily manufactured by Bayer Group (formerly Monsanto Company), these herbicides are cost-effective, non-selective, and degrade relatively quickly , making them desirable for both agriculture and forest industries. In Alberta, glyphosate-based herbicides are commonly used to control vegetative competition during reforestation, primarily with the goal of aiding conifer release. However, concerns persist about potential negative impacts of glyphosate on human and animal health, biodiversity, forest composition, and ecological succession, which has compelled government and industry to re-evaluate the use of glyphosate for operational forestry purposes. The objective of this research is to assess the persistence of glyphosate within operationally treated forestry cut-blocks to evaluate plant biomass recovery, potential exposure of wildlife through browse, species diversity, and plant community change. Data were collected throughout thirty-nine recently treated planted cut-blocks across western Alberta over three years, and glyphosate concentration was quantified for eighteen plant species of interest. Biomass sampling was used to estimate biomass of available browse, and nonmetric multidimensional scaling (NMDS) ordinations were done to evaluate plant community change. Results indicate minimal persistence of glyphosate at one-year post-treatment, and further rapid decline. Preferred ungulate browse species are initially reduced, and many do not exhibit significant recovery within the study period, suggesting limited potential for wildlife exposure to glyphosate through browse. Glyphosate has the strongest influence on plant community composition in the first year following application; however, in subsequent years, shifts in community structure appear to be more closely driven by climatic factors. This suggests that glyphosate persisting within plant tissues does not adversely impact the community composition when used for operational forestry purposes.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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) | 0.000 | 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 source (direct Gemma or distilled Codex), 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".