An initial comparison of growth rates in the rare grass <i>Achnatherum hendersonii</i> and its common associate <i>Poa secunda</i>
Bibliographic record
Abstract
The rare grass, Achnatherum hendersonii (Vasey) Barkworth, and the more widely distributed Poa secunda J. S. Presl grow together on shallow soils derived from basaltic rock that are subject to cryogenic disturbance. It has been proposed that the solifluction allows A. hendersonii to persist by inhibiting the competitive ability of P. secunda . A correlate of this proposal is that P. secunda will have a superior growth rate in undisturbed soils. This idea was tested by growing both species in potting soil, both singly and in combination. Under these conditions, P. secunda grew faster and attained a larger above‐ground size than A. hendersonii . Thus, one factor allowing the survival of the rare A. hendersonii seems to be its occurrence on sites where the competitive ability of a wide‐ranging species is restricted. The survival of A. hendersonii on disturbed sites may also be partly explained by its roots that are apparently adapted to growing where solifluction occurs.
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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".