Interspecific differences in the response of juvenile stages to physical stress: fluorometric responses of fucoid embryos to variation in meteorological conditions<sup>1</sup>
Bibliographic record
Abstract
Chl fluorescence during and immediately after low tide under four meteorological conditions was measured in embryos of three fucoid algae [ Ascophyllum nodosum (L.) Le Jol., Fucus vesiculosus L., and Fucus distichus subsp. edentatus Bach. (Pyl.) H. T. Powell] vertically distributed in the intertidal zone in Québec, Canada. Artificial substrata with attached embryos of each species were outplanted into each zone and into two different microhabitats: under and outside an adult canopy. Several fluorescence measurements were made using pulse‐amplitude‐modulated (PAM) fluorometry, from which maximum quantum yield ( F v / F m ), effective quantum yield (φ PSII ), relative electron transport rate (rETR), and nonphotochemical quenching (NPQ) were calculated. F v / F m , φ PSII , and rETR decreased, and NPQ increased during low tide, most rapidly under the most desiccating meteorological conditions (i.e., sunny‐windy weather). The species occurring lowest in the vertical distribution, F. distichus subsp. edentatus , was the most affected, and the two highest species, A. nodosum and F. vesiculosus , only rarely differed. Tidal height itself also influenced the decline in fluorescence parameters, with more gradual declines in lower zones, except under the least desiccating conditions (i.e., cloudy‐calm weather). Recovery upon reimmersion was rapid in all circumstances. Under a canopy, decreases in maximum and effective quantum yields were more gradual than in exposed locations. Although the young stages of these species were affected by physical conditions experienced during low tide and their exact response depended on the precise meteorological conditions, differences in responses among species were surprisingly small. The abilities of young stages to withstand aerial conditions were, however, consistent with the zonation patterns of adults, and conditions under an adult canopy offered some protection.
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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 | 0.003 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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) | 0.001 | 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".