trunk
Enable an agent to recognise a tree trunk, record its structural and biological condition, and identify interventions that require further assessment.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise a tree trunk, record its structural and biological condition, and identify interventions that require further assessment.
In the botanical sense, a trunk is the principal persistent woody stem of a tree, supporting the crown and containing tissues involved in transport, storage and structural support.
It can be Identify and map individual trunks within a multi-stemmed tree.; Measure trunk size and form using a documented, repeatable protocol.; Locate and photograph wounds, cracks, cavities, and bark changes for comparison over time.; Flag observations that warrant assessment by a qualified tree specialist.; Evaluate proposed attachments, guards, or nearby works for potential trunk injury.; Track authorised interventions and subsequent changes in trunk condition..
Distinguishing features
It is identified as a main stem of a tree, rather than simply any woody axis.
Its lower boundary connects to the root collar; roots extending from that transition belong to the root system.
Branches arise from it, while forks may create multiple competing main axes requiring an explicit boundary convention.
It remains part of a standing tree or standing dead tree; a detached segment is ordinarily managed as a log.
A palm's trunk-like main stem can fall within scope, but its tissue organisation must not be assumed to match that of a typical woody tree.
Scope
+ Identification of a trunk and its relationship to its parent tree
+ Root-collar and crown transitions, forks, and multiple main stems
+ Trunk dimensions, form, orientation, and growth observations
+ Bark, underlying tissues, cavities, wounds, and visible biological activity
+ Trunk support, exposure to loading, and constraints on intervention
- An elephant's trunk and the anatomical torso of an animal
- Storage trunks, vehicle luggage compartments, and technical trunk networks
- Whole-tree taxonomy, population ecology, and conservation assessments
- Detailed root-system and branch-system models beyond their trunk interfaces
- Felled logs, processed timber, and wood products as managed materials
Characteristics
- Parent tree and stem identity
- Parent-tree reference and locally unique stem identifier Keeps observations attached to the correct stem, particularly in multi-stemmed trees.
- Growth-form context
- Woody tree stem; palm main stem; other tree-form stem; unresolved Determines which anatomical and growth assumptions are appropriate.
- Diameter at a recorded height
- cm, with measurement height in m, method, date, and treatment of irregularities Supports repeatable size and growth comparisons without concealing measurement conventions.
- Trunk extent
- m between explicitly identified lower and upper boundaries Makes measurements comparable when branching and crown transitions are ambiguous.
- Stem architecture
- Single main axis; forked; multiple main stems; fused stems; unresolved Guides stem identification and interpretation of unions and load paths.
- Lean and curvature
- Degrees from vertical, direction, reference segment, and observation date Allows changes in position to be distinguished from established growth form.
- Tissue and surface condition
- Located observations of intact bark, wounds, cracks, cavities, exposed tissue, and growth response; unknown where unexamined Separates observed condition from assumptions about internal soundness.
- Load and exposure relationships
- Supported crown, attachments, nearby targets, and known changes in exposure Places trunk condition in the context needed to judge inspection and intervention priorities.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.trunk
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 14 findings · 25 questions.
Trunk identity and boundaries Establishes which main stem is being modelled and where its extent begins and ends.
Trunk observations become ambiguous when stems fork, fuse, or lack a distinct crown transition.
Parent tree and main axis
Connects the trunk to its tree and distinguishes it from neighbouring axes.
Identified main stem
Record the parent tree, growth form, and evidence for treating this axis as a trunk.
- Which parent tree and individually identifiable main stem does this record describe? definition
- What distinguishes this axis from a branch, basal shoot, or adjacent tree? boundary
Root collar, crown, and forks
Defines operational boundaries at anatomical transitions.
Explicit trunk extent
Record lower and upper landmarks and the convention used at forks or fused stems.
- Which visible landmarks define the root-collar and upper trunk boundaries? boundary
- At each fork or fusion, are the axes recorded as one trunk or separate trunks, and why? boundary
Trunk form and growth Records dimensions and changes in main-stem geometry.
Taper, buttresses, lean, and irregular cross-sections affect both measurement and interpretation.
Diameter, taper, and extent
Makes trunk measurements reproducible despite irregular form.
Repeatable stem dimensions
Record dimensions with their measurement locations, methods, and exceptions.
- What diameter or circumference was measured, at what height and date, and by which method? measurement
- How were buttresses, swellings, forks, or a non-circular cross-section handled? measurement
Orientation and change
Tracks lean, curvature, and growth without assuming every asymmetry is a defect.
Documented form change
Separate established trunk form from changes supported by comparable observations.
- What are the trunk's lean direction, angle, and curvature relative to recorded reference points? measurement
- Which dated observations establish whether its lean, diameter, or shape has changed? provenance
Trunk tissues and condition Organises observations of trunk surfaces and evidence about underlying tissues.
External appearance, internal condition, and growth response are distinct and depend on the tree's anatomy.
Anatomy and bark
Interprets surface features using the parent tree's growth form.
Growth-form-specific surface
Record bark and surface features without applying unsupported anatomical assumptions.
- Which parent-tree identification supports the anatomical interpretation used for this trunk? provenance
- Which surface features are expected for that growth form, and which remain unexplained? definition
Wounds, cavities, and associated organisms
Locates damage and biological observations while retaining uncertainty about hidden tissues.
Located condition evidence
Record the position and extent of wounds, cracks, cavities, and organism signs separately from diagnostic conclusions.
- Where is each wound, crack, cavity, or organism sign, and what observable extent does it have? measurement
- What examination supports any claim about decay or internal tissue condition, and what remains unexamined? provenance
- Does a cavity or associated organism require specialist identification before work proceeds? action
Trunk support and intervention Connects trunk condition to supported loads, surroundings, and proposed actions.
A visible trunk feature alone does not establish failure likelihood or justify an intervention.
Load paths and exposure
Relates trunk geometry and condition to crown loading and the root interface.
Contextual structural assessment
Record relevant loading and site context, including limits of a trunk-only assessment.
- Which crown sections, major unions, and installed attachments load this trunk? boundary
- What changes in wind exposure, crown loading, or root support affect the assessment? provenance
- Which observations require a whole-tree assessment before a structural conclusion can be made? action
Protection and follow-up
Defines evidence and constraints for trunk protection, treatment, and monitoring.
Justified trunk actions
Tie each proposed action to a documented need, relevant authority, and follow-up criterion.
- What evidence supports the proposed guard, attachment adjustment, investigation, or other trunk intervention? action
- Which permissions, habitat constraints, and specialist requirements apply to the proposed work? action
- What trunk changes should be checked afterward, and what would trigger reassessment? measurement
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- The botanical sense is assumed; PHY.LIV alone does not distinguish a tree trunk from an anatomical trunk.
- A trunk is an organ, not a taxon, so it has no species-level taxonomic authority or conservation assessment of its own.
- Dimensions and internal anatomy depend strongly on species, age and growth form; palms and other tree-like plants require distinctions from typical woody trees.
- Which of these check these first hold for the sense of trunk this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Single trunk
- Forked trunk
- Buttressed trunk
- Which of these kinds and varieties hold for the sense of trunk this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Timber and wood production
- Tree inventory and growth monitoring
- Assessment of tree stability and structural condition
- Habitat for organisms living in bark, wood and cavities
- Estimation of tree biomass and carbon stocks
- Which of these real-world use hold for the sense of trunk this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Wood decay can reduce structural strength.
- Cracks and weak unions can contribute to trunk failure.
- Girdling damage can interrupt transport through the inner bark.
- Boring insects and pathogens can damage trunk tissues.
- Wind, fire and mechanical impacts can injure or break trunks.
- Which of these failure modes and hazards hold for the sense of trunk this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Tree inventories use different prescribed heights and conventions for measuring trunk diameter, particularly for sloping ground, forks and buttresses.
- Which of these regional variation hold for the sense of trunk this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- tree - A tree is the whole organism; its trunk is one structural part.
- stem - Stem is the broader botanical category; a trunk is a principal persistent woody stem.
- branch - A branch is a lateral stem arising from the trunk or another branch.
- bark - Bark comprises tissues outside the vascular cambium; it is part of the trunk rather than the entire trunk.
- log - A log is a cut section of woody stem, whereas trunk names the tree's structural organ.
- elephant trunk - An elephant trunk is an elongated muscular organ formed from the nose and upper lip, not a plant stem.
- human trunk - In human anatomy, trunk denotes the torso rather than a woody plant organ.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of trunk this model covers, and on what evidence? provenance
What the second pass must settle
- Does vr.tr.trunk denote a tree's main stem, an elephant's trunk, an animal torso, or another sense in the source registry?
- Does an existing Vercy model already own the botanical trunk concept or its main-stem abstraction?
- Should botanical scope include palms and other tree-form plants whose stem anatomy differs from typical woody trees?
- Which conventions should govern trunk boundaries and identifiers in forked, fused, coppiced, and multi-stemmed trees?
- Which measurement and tree-assessment standards should supply the protocols and terminology for a researched publication?