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Record W4240558166 · doi:10.1139/cjz-78-5-713

Predator size and distance to edge: is bigger better?

2000· article· en· W4240558166 on OpenAlexvenueaboutno aff
Steven H. Ferguson

Bibliographic record

VenueCanadian Journal of Zoology · 2000
Typearticle
Languageen
FieldAgricultural and Biological Sciences
TopicStudy of Mite Species
Canadian institutionsnot available
Fundersnot available
KeywordsPredationBiologyEcologyPredatorMicroclimateSoil mesofaunaLitterPlant litterSoil waterSoil biologyEcosystem

Abstract

fetched live from OpenAlex

I investigated the use of edge by soil arthropods by testing whether mesoarthropod predators were closer to edge than expected and whether large predators were closer to edge than small predators. The experimental design consisted of 120 boxes, each covering 200 cm2 of soil, that were randomly distributed within a 0.13-km2 aspen stand located in the Canadian prairie region. Each 2-kg box depressed the leaf litter, creating a microhabitat island for soil arthropods consisting of 61 cm of edge. During 20 weekly surveys from May to September in 1997 and 1998, numbers and distribution of arthropods located immediately beneath the boxes were recorded. Mesoarthropod predators were found closer to edge than expected. Centipedes, beetle larvae, and predatory mites (Acari) were found at intermediate distances to edge, whereas beetles, ants, adult flies, bugs, and spiders were distributed adjacent to edge. Generally, larger mesoarthropod predators were found closer to edge than smaller individuals, within each taxonomic group. Collembola, the major mesofauna prey, were distributed randomly with respect to edge during wet periods of high density. During the subsequent dry periods, reduced densities of Collembola occurred and distribution became skewed, with greater numbers in interior areas and reduced densities near edges. Temperature and moisture under the boxes did not vary with distance to edge, although the microclimate was cooler and more humid under the experimental boxes relative to beyond the boxes. These results support the hypotheses that mesoarthropod predators forage along box edges (i.e., linear corridors) and that larger individuals may gain access to edge owing to their larger size, although alternative explanations are possible, depending on the particular taxonomic group.

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: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.505
Threshold uncertainty score0.993

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)0.0080.000

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 head0.010
GPT teacher head0.192
Teacher spread0.181 · 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

Citations7
Published2000
Admission routes2
Has abstractyes

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