Distribution and Ecology of COLPOMENIA PEREGRINA SAUVAGEAU within the Northwest Atlantic
Bibliographic record
Abstract
The saccate Asiatic brown seaweed Colpomenia peregrina was first recorded within the NW Atlantic in 1960 at Atkins Point, Nova Scotia. By 2014 it was recorded from 57 sites ranging from the Grand Barachois Lagoon, Newfoundland to South Wellfleet, MA. We first found extensive populations in New England at Fort Foster, Kittery, Maine where we subsequently conducted floristic and ecological studies of the alga. Colpomenia peregrina is superficially similar to another saccate brown alga, Leathesia marina, although they have differences in morphology, anatomy, and reproduction. The species is a common epiphyte on at least 33 seaweeds within the NW Atlantic, with Corallina officinalis being its most common host. It also grows on the seagrass Zostera marina and on at least two common invertebrates, Mytilus edulis and Semibalanus balanoides. Colpomenia peregrina is an annual somewhat like Petalonia fascia, with some specimens bearing plurilocular gametangia year-round. Based upon collection of samples from 57 sites, its convoluted hollow thalli had mean diameters and heights of less than 7.5 cm and damp dried weights of less than 10.0 g. Subtidal transects studies within the shallow subtidal zone at the Isles of Shoals, NH/ME, showed a wide range of densities (15–2721 m−2) and mean diameters of 0.47–1.72 cm. The demography of 663 drift, 442 attached, and 903 epiphytic thalli were documented from Fort Foster, ME during 31 monthly visits. Drift thalli had their largest diameter and height in winter (6.9×4.7 cm), whereas those from low intertidal ledge quadrats were largest in summer (3.4×2.5 cm), and random mid-intertidal pool samples were largest in the fall (2.9×1.6 cm). The mean number of epiphytic thalli on apical parts of three fucoid algae within a mid-intertidal pool ranged from 0.09 cm−1 on Ascophyllum nodosum, to 0.23 cm−1 on Fucus vesiculosus, and 0.43 cm−1 on F. distichus subsp. evanescens. The alga's southward expansion and colonization of low intertidal and shallow subtidal habitats in the NW Atlantic indicate that it is already competing for space and resources with native vegetation as well as causing removal of attached hosts.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 |
| 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 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".