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Record W2144583982 · doi:10.1088/1755-1307/5/1/012002

Marine palynology and its use for studying nearshore environments

2009· article· en· W2144583982 on OpenAlexaff
Anne de Vernal

Bibliographic record

VenueIOP Conference Series Earth and Environmental Science · 2009
Typearticle
Languageen
FieldEarth and Planetary Sciences
TopicGeology and Paleoclimatology Research
Canadian institutionsUniversité du Québec à Montréal
Fundersnot available
KeywordsPalynologyBenthic zoneFluvialPollenGeologyBiotaSedimentSedimentary organic matterOrganic matterPaleontologyEcologyOceanographyBiology

Abstract

fetched live from OpenAlex

Palynology is the study of microfossils composed of highly resistant organic matter called palynomorphs. In the sediments of neritic environments, palynomorphs may include cysts of dinoflagellates, phycoma of prasinophytes, organic linings of benthic foraminifers and thecamoebians, in addition to inputs from the terrestrial vegetation (pollen grains and spores) or the freshwater biota (chlorococcales). Marine palynology is thus used for characterizing the type of sedimentary environment, identifying the source of organic matter in the sediment, and weighting the relative importance of fluvial and pelagic inputs. Among marine palynomorphs, dinoflagellate cysts or dinocysts usually dominate the assemblages. Dinocysts comprise phototrophic and heterotrophic taxa and occur in almost all aquatic environments. Along the continental margins, assemblages are usually characterized by high species diversity and cyst concentrations reaching up to 10 5 cysts cm -3 . The distribution of dinocyst assemblages in sediments shows latitudinal patterns in addition to onshore to offshore gradients. Multivariate analyses illustrate close relationships between dinocyst assemblages and sea-surface parameters such as sea-ice cover, salinity, temperature, seasonality and productivity. Transfer functions developed from dinocysts permit the reconstruction of sea-surface temperature and salinity and the evaluation of past productivity, with applications dealing with climate changes and eutrophication. Dinocysts are also used for the study of harmful algal blooms since a few taxa relate to toxic species.

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 imitation

Not 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.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.002
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.008
Threshold uncertainty score0.025

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.002
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0070.010
Science and technology studies0.0010.001
Scholarly communication0.0030.002
Open science0.0000.002
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0080.002

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.

Opus teacher head0.032
GPT teacher head0.229
Teacher spread0.197 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreEmpirical

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".

Quick stats

Citations31
Published2009
Admission routes1
Has abstractyes

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