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Record W2919059100 · doi:10.1002/fee.2010

New recruit at the tree line

2019· review· en· W2919059100 on OpenAlexaffabout
Anna L. Crofts

Bibliographic record

VenueFrontiers in Ecology and the Environment · 2019
Typereview
Languageen
FieldEarth and Planetary Sciences
TopicTree-ring climate responses
Canadian institutionsMemorial University of Newfoundland
Fundersnot available
KeywordsEcotoneTree lineLarchTundraBorealTaigaEcologyBiological dispersalSubarctic climateClimate changeRange (aeronautics)Boreal ecosystemEcosystemBiologyEnvironmental scienceShrubPopulation

Abstract

fetched live from OpenAlex

New needles emerge from a year-old Larix laricina seedling at the alpine tree line in Newfoundland, Canada, following its first winter. This boreal conifer is widely distributed across North America, often occurring as a co-dominant species at boreal forest range limits. The treeline ecotone – the transition between forest and alpine or tundra ecosystems – is commonly recognized as a thermal boundary and represents the uppermost altitudinal and greatest latitudinal conditions that can support tree growth, survival, and reproduction. Treeline populations of L laricina, and other treeline-forming boreal conifers, are expected to advance upslope and to greater latitudes in response to increasing atmospheric temperatures. Treeline advance must initially depend on increased recruitment, the production or dispersal of viable seeds followed by seedling establishment and survival at or beyond current range limits. Although there has been no ubiquitous response to atmospheric warming among other boreal conifer tree genera, evidence suggests that recruitment of Larix spp at the tree line has increased. Differential responses between co-dominant tree species will result in the formation of novel treeline communities, which will likely have critical implications for treeline ecotone structure and function. Will these changes promote or inhibit climate-change effects on boreal tree distribution?

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)0.000
metaresearch head score (Gemma)0.001
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: Review · Consensus signal: Review
Teacher disagreement score0.011
Threshold uncertainty score0.022

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0010.001
Science and technology studies0.0000.000
Scholarly communication0.0010.001
Open science0.0010.001
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0060.004

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 head0.027
GPT teacher head0.238
Teacher spread0.211 · 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
GenreReview

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

Citations1
Published2019
Admission routes2
Has abstractyes

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