The effect of single versus successive warm summers on an intertidal community
Bibliographic record
Abstract
To accurately predict how organisms and ecological communities will respond to future conditions caused by climate change, we must consider the temporal dimension of environmental stressors, including the effects of repeated exposures to stress. We performed a two-year passive warming experiment in coastal British Columbia to explore the response of intertidal communities to single and successive warm summers. Elevated summertime temperatures tended to reduce the abundance of barnacles and grazers, algal cover, and alpha diversity compared to ambient temperatures, and both contemporaneous and persistent effects of warming were detected. While elevated summer temperatures appeared to have direct effects on organism survival and growth, the persistent effects of warming through time and differences in community structure between treatments were likely mediated by differences in foundation species (barnacle) abundance between treatments. Unexpectedly, the effects of thermal stress in year two were rarely dependent on whether there had been thermal stress in year one. Our study suggests that, while barnacle beds can recover from single warm summers, recurring thermal stress will result in a more depauperate, less diverse community over time, particularly if foundation species are negatively affected.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 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".