<i>Spartina alterniflora</i> genotypic identity affects plant and consumer responses in an experimental marsh community
Bibliographic record
Abstract
Summary Competition and herbivory are ubiquitous processes known to interactively shape plant performance, distribution and community assembly. Likewise, plant genetic variation and associated trait differences can impact both plant–plant and plant–herbivore interactions individually, yet few studies have explored these interactions simultaneously. Saltmarsh communities are an ideal system to study these questions, as they are dominated along the Atlantic and Gulf coasts of the United States by a foundation plant species, Spartina alterniflora , with high levels of genetically based trait variation. Furthermore, consumer pressure and plant competitors are known to influence both the distribution and production of Spartina . We manipulated Spartina genetic identity, neighbour identity (needlerush, Juncus roemerianus ) and consumer presence (snail, Littoraria irrorata ) in a 1‐year field experiment in St. Joseph Bay, FL , to test how the strength and direction of neighbour and consumer interactions vary by plant genotype. Consumer effects on Spartina were generally stronger and more variable than those of the plant neighbourhood, and these effects were generally consistent across Spartina genotypes. However, genotype‐specific variation in morphology, phenology and palatability significantly influenced both consumer and neighbour responses to Spartina : the consumer Littoraria was more likely to climb palatable Spartina genotypes, and neighbouring Juncus had shorter stems in the presence of highly productive Spartina genotypes. Synthesis . Our results add to the growing list of examples high‐lighting the role of intraspecific variation in species interactions and suggest that variation in these interactions may promote the maintenance of plant genetic variation and community composition.
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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 | 0.001 | 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 | 0.001 |
| 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".