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Record W4253726014 · doi:10.22215/etd/2014-10118

Disturbance-based restoration for recovery of pitch pine (Pinus rigida) in the Thousand Islands Ecosystem: a comparison of prescribed fire and mechanical disturbance on seedling regeneration

2014· dissertation· en· W4253726014 on OpenAlexafffundabout
Joshua Van Wieren

Bibliographic record

Venuenot available
Typedissertation
Languageen
FieldEnvironmental Science
TopicFire effects on ecosystems
Canadian institutionsCarleton University
FundersParks Canada
KeywordsDisturbance (geology)EcosystemRange (aeronautics)Environmental scienceRegeneration (biology)SeedlingEcologyIntermediate Disturbance HypothesisPinus <genus>Fire regimeNatural regenerationBiologyAgroforestryAgronomyBotany

Abstract

fetched live from OpenAlex

Disturbance plays an important role in maintaining forests worldwide. Many natural disturbance regimes, especially wildfire, have been modified, which can lead to the loss of disturbance adapted forest communities. Pinus rigida (pitch pine) is strongly associated with wildfire in the core of its range, however the association becomes less certain towards the species’ range margins. I tested the efficiency of a prescribed fire and mechanical disturbance treatment on increasing P. rigida seedlings using a Before-After Control-Impact (BACI) design at two sites at the northeast range margin of P. rigida in the Thousand Islands Ecosystem, Canada. Fire had the greatest effect on regenerating P. rigida seedlings and mechanical treatments were ineffective. My results suggest that the use of prescribed fire is the best approach to increase P. rigida seedlings in the Thousand Islands Ecosystem, possibly because these populations are exhibiting phenotypic plasticity in traits that favour conditions created by fire.

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)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.951
Threshold uncertainty score0.098

Distilled classifier scores by category (both heads)

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)0.0010.000

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 head0.012
GPT teacher head0.252
Teacher spread0.240 · 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 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

Citations0
Published2014
Admission routes3
Has abstractyes

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