Approval Plans OPW16-0203.01 pdf

Arboricultural Assessment Report v1                                                                        NCES REF: J000742
Proposed Footpath – Elm St, Cooroy (Palm Lakes)



APPENDIX 4 – DEFINITIION OF TERMS

AS4373-2007                          Australian Standard relating to the Pruning of Amenity Trees.
AS4970-2009                          Australian Standard relating to the Protection of Trees on Development Sites
Amenity Trees:                       Trees with recreational, functional, environmental, ecological, health, social or
                                     aesthetic value rather than production purposes.
Tree:                                Long lived perennial plant usually greater than 3m high. Trees possess roots, stem
                                     and leaves.
Leaves:                              The main photosynthetic tree component. Used for the production of sugars and
                                     oxygen for energy production required for cellular function, non-woody component of
                                     a tree.
Trunk:                               Organ which supports branches, leaves, flowers and fruiting bodies.
Aerial Inspection:                   Arboricultural inspection of upper branches unable to be viewed from ground.
                                     Generally performed by and climber/Arborist.
Arborist:                            Person with level 3 Arboricultural training as per the Australian Qualification
                                     Framework (AQF)
Consulting Arborist:                 Person with level 5 Arboricultural training as per the Australian Qualification
                                     Framework (AQF)
DBH:                                 Diameter at breast height measured 1.4m above ground level.
Height:                              Measure of tree height from root plate to highest leaves.
Spread:                              Measure of the tree’s width from outermost leaves.
Vigor:                               Inherent genetic capacity of a tree to deal with stress.
Vitality:                            Ability of plant to deal effectively with stress.
Co dominant:                         Stems or trunks close to the same diameter originating from the same location on
                                     the main stem.
Compartmentalization:                Compartmentalization of decay in trees (CODIT). Trees defence mechanism to stop
                                     the spread of decay to adjacent tissues.
Included Bark:                       Inwardly formed bark within the junction of branches and/or co-dominant branches.
Pathogen:                            Any disease-causing organism
Wound:                               An opening in a tree where pathogens can enter.
Epicormic Growth:                    Weak shoots produced from epicormic buds located at the cambium of trunks and/or
                                     branches. Often caused by poor pruning practices. Can also be called waterspouts,
                                     whorls and suckers.
Dead Wood (DW):                      Branches within the canopy that have died. This is a natural occurrence that can be
                                     accelerated through poor site management including inadequate exclusion zones.
Drip Line:                           Circumference of tree canopy projected upon the ground plane. Area where water
                                     lands beneath tree canopy under the influence of gravity.
Compaction:                          Soil that has been compressed to a level that gas and water exchange has been
                                     limited. This in turn prevents the tree from obtaining the vital minerals it requires.
Decay:                               An area where fungal and/or bacterial agents that have affected the tree causing
                                     degradation of the woody tissue.
Decay Pockets:                       An area of decay isolated or compartmentalised by the tree. This is not always
                                     critical however, the level of decay requires monitoring.
Poor Pruning:                        Pruning that does not comply with Australian Standards AS4373.
Protective Fencing:                  Fencing as per Vegetation Management Plans (VMP) or Tree protection plans (TPP)
                                     as per Local council specifications or landscape details.
Class 2 Prune (Cl 2):                Pruning to remove any dead wood greater than 50mm in diameter to improve the
                                     safety or structure of trees. This must comply with AS4373
Weight Reduction:                    Pruning of selected branches in compliance with AS4373 to reduce pressure on
                                     branch unions. This should be carried out with Class 2 pruning and is mainly on
                                     lateral branches.
Aeration:                            Use of compressed air injected into the soil profile to create fissures and reverse the
                                     effects of compaction.




© 2020                                                        15