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Record W2999450773 · doi:10.5558/tfc2019-027

Forest growth trends in Canada

2019· article· en· W2999450773 on OpenAlexaffvenueabout
Craig Loehle, Kevin A. Solarik

Bibliographic record

VenueThe Forestry Chronicle · 2019
Typearticle
Languageen
FieldEarth and Planetary Sciences
TopicTree-ring climate responses
Canadian institutionsAir Canada
FundersNational Council for Air and Stream Improvement
KeywordsDendrochronologyPrecipitationAbiotic componentGeographyForestryEnvironmental scienceAgroforestryPhysical geographyEcologyBiologyArchaeology

Abstract

fetched live from OpenAlex

Reports have identified changes in abiotic factors that potentially affect forest growth. A synthesis of studies of thesechanges in Canada over the past century was undertaken to evaluate how these factors may be influencing forest growth.Reviewed papers used multiple sources of data including long-term inventory plots, tree-ring reconstructions, historicalgeographic data, and forest growth models. The synthesis showed that several positive growth trends were found inBritish Columbia and eastern Canada, while results from the western interior of Canada were mixed. Trembling aspen(Populus tremuloides Michx.) dieback has been noted due to severe and prolonged drought events, with growth reduc-tions and mortality also documented for conifers in the western interior. Studies have also found slow forest expansionin many areas and at the northern tree-line. Overall, authors attributed positive forest growth trends to rising CO 2 con-centrations, N deposition, increased precipitation, and increased temperature. Growth declines were generally attributedto a combination of increased temperatures and reduced precipitation. Studies also differed due to time periods consid-ered and how age effects were corrected. Methodological issues were identified that led to contradictory results betweensome studies. These issues need further study.

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 distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesInsufficient payload (model declined to judge)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.040
Threshold uncertainty score0.998

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0030.000

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.

Opus teacher head0.011
GPT teacher head0.206
Teacher spread0.195 · 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 teacher head, not a consensus.

Study designObservational
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

Citations15
Published2019
Admission routes3
Has abstractyes

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