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Record W1789851646 · doi:10.4000/cybergeo.26969

Identification des variables expliquant la distribution spatiale d’oiseaux de la forêt boréale et modélisation de tendances futures : une approche multivariée

2015· article· fr· W1789851646 on OpenAlexaboutno aff
Jonathan Gaudreau, Liliana Pérez, Pierre Legendre

Bibliographic record

VenueCybergeo · 2015
Typearticle
Languagefr
FieldEnvironmental Science
TopicSpecies Distribution and Climate Change
Canadian institutionsnot available
Fundersnot available
KeywordsForestryGeographyHumanitiesArt

Abstract

fetched live from OpenAlex

Les changements climatiques prennent une importance grandissante dans l’étude de la dynamique des populations animales. Plusieurs experts s’entendent pour affirmer que les changements climatiques seront un des principaux moteurs de changement écologique dans les prochaines décennies. L’objectif de cette recherche est l’identification des principaux facteurs responsables de la distribution spatiale d’oiseaux de la forêt boréale au Québec, afin de proposer des modèles de distribution d’espèces suivant les changements climatiques prévus. Deux approches multivariées sont employées : l’analyse de redondance canonique (RDA) et le partitionnement de variation. Au total, 39 espèces d’oiseaux sont sélectionnées, en plus de variables bioclimatiques, anthropiques, écoforestières et d’élévation. Les variables bioclimatiques sont responsables de 53% de la variation dans la répartition spatiale des oiseaux étudiés, les variables ressources, c’est-à-dire l’altitude et le pourcentage de milieu humide, de 5%, et les variables anthropiques de moins de 1%. Les résultats des modèles démontrent que les deux espèces modélisées verront leur répartition spatiale fortement modifiée par les changements climatiques et se déplaceront vers les latitudes plus septentrionales ou en altitude, suivant l’intensité du réchauffement.

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)0.005
metaresearch head score (Gemma)0.008
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.044
Threshold uncertainty score0.087

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0050.008
Meta-epidemiology (narrow)0.0020.001
Meta-epidemiology (broad)0.0020.005
Bibliometrics0.0020.002
Science and technology studies0.0010.001
Scholarly communication0.0020.001
Open science0.0020.001
Research integrity0.0020.002
Insufficient payload (model declined to judge)0.0040.001

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 head0.035
GPT teacher head0.298
Teacher spread0.263 · 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 designSimulation or modeling
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

Citations5
Published2015
Admission routes1
Has abstractyes

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