AC-Ch. 12 Tree Assessment And Risk Management Flashcards
Decay of the lower trunk, trunk flare or butress roots.
Basal rot
Fungal wood rot characterized by the breakdown of cellulose
Brown rot
In determining legal liability the test of the proximate cause and foreseeability of the consequences.
Causation in fact
Open or closed hollow within a tree stem usually associated with decay
Cavity
Fruiting body or nonfruiting body (sterile) of a fungus. Often associated with decay
Conk
Any device used to assess the presence of hidden internal decay
Decay detection device
Legal obligation that requires an individual to use a reasonable standard of care when performing tasks that may potentially harm others.
Duty of care
In tree risk assessment the professional assessment of the likelihood for a tree to fail within a defined period of time
Failure potential
Reproductive structure of a fungus. The presence of certain species may indicate decay in a tree.
Fruiting body
Any of several types of fungal decay of tree heartwood often beginning with infected wounds in the living portions of wood tissue.
Heartwood rot
Device used to take core samples from trees to determine age or detect problems such as decay
Increment borer
Something for which one is responsible. Legal responsibility
Liability
General term used to indicate the magnitude of a force, bending moment, torque, pressure etc. applied to a substance or material.
Load
Cargo; weight to be borne or conveyed.
Load
In tree risk management, reducing, alleviating or minimizing risk of harm.
Mitigation
Failure to exercise due care
Negligence
Legal term that describes an act or omission that can be attributed as cause if loss and/or injury.
Proximate cause
Wood formed in leaning or crooked stems or on lower or upper sides of branches as a means of counteracting the effects of gravity
Reaction wood
Non-destructive means of determining the soundness or structural integrity of an object or material by determining the rate at which sound waves travel through it.
Resonance testing
Process of evaluating what unexpected things could happen, how likely they are to happen and what the likely outcomes are. In tree management the systematic process to determine the level of risk posed by a tree tree part or group of trees
Risk assessment
Systematic application of management policies, procedures and practices for identifying, evaluating, treating, monitoring and communication risk
Risk management
Process of removing soil to expose and assess the root collar of a tree
Root collar excavation
Decay located in the sapwood. Bark and/or cambium may be damaged or dead. Signs of this classification of rot are usually numerous, but small, fruiting bodies along the bark’s surface are common.
Sapwood rot
Decay of plant tissues characterized by the breakdown of tissues within the cell walls.
Soft rot
Degree of care that a reasonable person should exercise in performing duty of care; a measurement used to assess whether an individual acted in a reasonable manner
Standard of care
Any naturally occurring or secondary conditions such as cavities, poor branch attachments, cracks or decayed wood in the trunk, crown or roots of a tree in that may contribute to structural failure.
Structural defects
Change in diameter over the length of trunks, branches and roots
Taper
Person, object or structure that could be harmed by a tree or tree part in the event of failure.
Target
Location of target pruning
Target
Image generated by tomography. Created by sending waves through an object; a computer then produces images of cross sections of the object by using information about how the waves change
Tomogram
Method of assessing the structural integrity of trees using external symptoms of mechanical stress and defects.
Visual tree assessment
Fungal decay of wood in which both cellulose and lignin are broken down.
White rot
Device that directs a jet of highly compressed air to excavate soil. Used within the root zone of trees to avoid or minimize damage to the roots or near underground structures such as pipes and wires.
Air excavator
