Forestcheck: terrestrial vertebrate associations with fox control and silviculture in jarrah (<i>Eucalyptus marginata</i>) forest
Bibliographic record
Abstract
Summary Terrestrial vertebrate associations with silviculture and other factors were investigated as part of the FORESTCHECK monitoring program in the jarrah (Eucalytpus marginata) forests of south-west Western Australia. A total of 48 integrated monitoring grids form the basis of this study—sampled over five years (2001–2006), across five ecosystem-defined regions (one sampled per year), each with replicates of two silvicultural treatments (shelterwood, gap release) and external reference forest (uncut forest or structurally mature forest that had not been harvested for timber for over 40 y). Terrestrial vertebrates were surveyed in spring and autumn using pitfall traps and wire cages. Forty-one terrestrial vertebrate taxa (8 frogs, 22 reptiles, 11 mammals) comprising 1165 captures were recorded. Fox (Vulpes vulpes) control had the strongest effect on terrestrial vertebrates, with baited areas supporting significantly more individuals (three-fold increase) than unbaited areas. The mammals Trichosurus vulpecula, Bettongia penicillata, Cercartetus concinnus and Dasyurus geoffroii, and the skink Tiliqua rugosa were particularly more abundant in fox-baited forest. Several terrestrial vertebrate community attributes (species accumulations by grids and number of individuals, dominance-diversity plots, overall community structure and overall abundance) differed little among the three treatments (i.e. two silvicultural, plus external reference forest). However, external reference grids had significantly lower species richness than the shelterwood grids and a significantly different community structure. These differences resulted from a greater prevalence within shelterwood of some species such as the reptiles Egernia napoleonis, Menetia greyii, Ctenotus labillardieri and Ramphotyphlops australis. Forests that had never been harvested, a subset (8/15 grids) of the external reference treatment, had the lowest overall abundance, due largely to a confounding with fox control. The level of replication enabled differences between treatments of greater than 23% in species richness, and 37% in overall abundance, to be detected as statistically significant. Significant ecosystem/year differences were found. Differences in community structure between ecosystems/years approximated the geographic/bioclimatic relationships between the grids, with the distinction between southern jarrah communities (Jarrah South/2001–02 and Jarrah Blackwood Plateau/2005–06) and the northern communities being particularly apparent. Time since last fire, live tree basal area, and the proportion of basal area removed by harvesting and silvicultural treatment were not correlated with vertebrate species richness, abundance or community structure. In comparison to the effect of fox control and regional/temporal variation, silvicultural treatment and the intensity of timber harvesting had minor impacts. Suggestions for the improvement of this and similar studies are discussed, with a particular focus on reducing residual variance and increasing sample size.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot 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.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
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".