Vegetation associations of the endangered <i>Opuntia cespitosa</i> (Prickly Pear, Cactaceae) and microsite variation in Point Pelee National Park, Ontario, Canada
Why this work is in the frame
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Bibliographic record
Abstract
Many Opuntia engage in nurse associations. Opuntia cespitosa is an endangered cactus species in Canada that is infrequent to rare in many parts of its US range. This study quantifies Opuntia cespitosa associations with other native and non-native plant species in its only substantial extant population in Canada, at Point Pelee National Park. Species cover was estimated along 100 transects across 50 Opuntia plants and in matched non-Opuntia transects. To determine Opuntia influence on its microsite, paired soil samples from under the cacti and near the cacti compared soil nutrients. Kruskal-Wallis tests, Wilcoxon Rank Signed tests and ANOVA tests compared microsites with and without cactus cover and compared groupings such as native/non-native status, growth form and life cycle. Soil moisture is low in the open, but higher yet variable under Opuntia. Opuntia soils have higher magnesium levels. Opuntia do not strongly favor any one species, but may be more beneficial to non-native species than to native ones. Poa compressa and other non-native graminoids were associated with Opuntia. Opuntia cespitosa, despite being at their northern range limit, do not appear to engage in facilitative associations with native species either as nurse or as protégé, but may be nursing non-native species.
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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 it