Asymmetric competition between a hemiparasitic plant and a cyst nematode on a shared host plant
Bibliographic record
Abstract
Closely related parasites can compete for limited resources of a shared host. We extend prior work by examining the interactions of two parasites from different kingdoms. We conducted a greenhouse experiment to test for possible competition between a root hemiparasitic plant Rhinanthus serotinus (Schönh.) Oborny and a plant parasitic cyst nematode (Heterodera trifolii Goffart) which share a common host plant, the red clover (Trifolium pratense L.). Competition between these species was strongly asymmetric: the presence of nematodes reduced the biomass and flower production of the hemiparasitic plant by 74% and 81%, respectively. In fact, the performance of hemiparasites grown on nematode-infected hosts was about as poor as that of hemiparasites grown without a host plant. In contrast, the presence of the hemiparasitic plant did not affect the population size or number of cysts produced by the parasitic nematodes. These results demonstrate competition between an animal parasite and a plant parasite for a shared host resource.
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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 | 0.001 | 0.001 |
| 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 | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".