Effect of Flea Beetles (<i>Aphthona Nigriscutis</i>) on Prairie Invaded by Leafy Spurge (<i>Euphorbia Esula</i>) in Maintoba
Bibliographic record
Abstract
Leafy spurge (Euphorbia esula) is an invasive exotic weed in Great Plains rangelands and pastures. Aphthona nigriscutis, the black dot flea beetle, was released as a biological control agent in nine heavily infested sites in south-central Manitoba (three sites in 1986, three in 1988, and three in 1990). In 1992 we evaluated beetle impact by sampling the vegetation in 25 x 25 cm quadrats. We measured cover, height, density, and biomass of leafy spurge, the cover of litter and bare ground, and the presence of other plant species both at the release point and at randomly-chosen nearby nonrelease reference points at each site. Leafy spurge near the release points showed significantly lower cover, biomass, height, and stem density than at the reference points. Also, release points had significantly more bare ground, higher grass and sedge biomass, and greater plant diversity. Other plant species, especially perennial grasses and sedges, increased in frequency, while frequency of leafy spurge did not change over time. Data such as these are important if we are to employ management techniques that can both reduce invasive weeds and restore native species diversity to the Great Plains prairies and rangelands.
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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) | 0.001 | 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 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".