Effect of cold exposure on seed germination of 58 plant species comprising several functional groups from a mid-mountain Mediterranean area
Bibliographic record
Abstract
The effects of cold stratification on seed germination of 58 species from a Mediterranean area in central—eastern Spain were studied. The area is subject to fires and has a very continental climate, with long winters (187 frost days during the year). Differences in germination among species taking into account their phylogeny were studied by dividing them according to their life form (chamaephytes, hemicryptophytes), post-fire regeneration strategy (non-sprouters, sprouters), and geographical distribution range (Iberian Peninsula endemics, Mediterranean, widely distributed species). Treated seeds were stratified at 5 °C for 4 weeks, then incubated, along with the control seeds, at 15 °C for 6 weeks. Most species were not affected by cold stratification, and in the cases where they were, germination was generally lower after stratification, not higher. In general, germination percentages were low, which shows that stratification by itself was not able to break seed dormancy. Functional groups differing in their post-fire regenerative strategy or distribution range showed differing responses. Sprouters and endemic species from the Iberian Peninsula were negatively affected by stratification treatment. This is interpreted as a mechanism to stop germination after winter, preventing plants from late germination in spring, which would leave them facing summer drought without a deeply developed root system.
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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 | 0.000 | 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 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".