Spatial and Temporal Patterns of Nekton Communities in Different Subhabitats of Maritime Canadian Salt Marshes
Bibliographic record
Abstract
Abstract Salt marshes are composed of a mosaic of subhabitats including intertidal creeks, the marsh platform, and salt pools. During tidal inundation, these subhabitats function together to provide habitat to nekton (fish and crustaceans). We determined nekton community compositions and spatiotemporal scales of variation between two biophysical regions with contrasting tidal regimes in Maritime Canada, on a seasonal basis (April‒November) in 2022‒2023. Bay of Fundy salt marshes with their megatides have higher marsh platform elevations and lower inundation times, compared to Northumberland Strait salt marshes with their microtides. The nekton community was speciose with a distinct composition between regions (accounting for up to ~40% of the variation) mostly reflecting different dominating species (Fundulus heteroclitus, Microgadus tomcod, sticklebacks, and Crangon septemspinosa) and varied seasonally (accounting for ~20% of the variation) reflecting transient and resident strategies. Subhabitat (in a separate presence-absence PERMANOVA) also accounted for a large portion of the compositional variation (~30%). Notably, creek and platform nekton communities differed regionally, while salt pool communities were more similar. Identifying community structure in salt marsh subhabitats across seasons enhances the understanding of nekton habitat function of this ecosystem in Maritime Canada.
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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 | 0.002 | 0.002 |
| 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) | 0.001 | 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 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".