Monday, April 28, 2008

ISA HK/China --- ISAAC e-news (Speakers Preview of the 2008 Brisbane ISA Conference)

Dear Station Members,

Underneath is the latest ISA Australia Chapter (ISAAC) e-news given to our region. Inside is a special preview on the Speakers of the May 8 Brisbane ISA Conference at which ISA HK/China will send in a group of no less than 13 participants (8 tree climbers to compete or support at the ATCC, & another 5 persons reported of going to ISA HK/China. No news has been received of which of our Govt Depts is going, although some said they may attend ...).

All ISA Conferences by tradition are serious education & networking known in ISA history of 84 years. In them, the latest research & practices are discussed & information from different regions is exchanged. Arborists are practitioners & talking with fantasy will not please most of them. They want to see things working with objectives attained, & not just talk, talk & talk. This is the attitude that makes Arborists such a distinctive profession accepted in the greenery industry around the world.

The Brisbane Conference will focus on knowledge relevant to our region such as tree inspection, tree pathology, risk assessment & tree failures which our region is aiming to improve. ISA HK/China hopes to bring back updates to educate our professionals so that our trees can become assets to our community rather than liabilities. Further announcement on this may be given later on.

ISA HK/China looks forward to participate & learn hard at the Brisbane Conference in about one week's time.

best regards,

Sammy Au
Station Manager

----- Original Message -----

From: ISAAC E-news


Sent: Sunday, April 27, 2008 4:15 PM

Subject: ISAAC Enews #39 - ISA Asia Pacific Conference - SPEAKER PREVIEW

Visit the ISAAC Website - Now with live tree news from around Australia!If you're not a member of the ISAAC E-news mailing list, you can join it at It's free and you don't have to be a member of ISAAC.

****** ISA Asia Pacific Conference FILLING FAST ******

ISA Asia Pacific Conference - May 9-14, Brisbane, Australia. Interest is strong and more workshops and hotels are booked out. You will regret missing this once-in-a-lifetime opportunity to see this diverse range of speakers. See below for a sample of speaker biographies and abstracts.Register online at the ISAAC Online Shop to avoid disappointment, or go to the ISAAC Website for more details.

Ted Green:

Ted, a founder member of the Ancient Tree Forum, travels world wide to raise the profile of ancient trees.Ted grew up on the edge of Windsor Great Park, home to some of the finest ancient trees in Europe and many have been special to him from childhood. He is a consultant to the Crown Estates there.Ted has worked on plant pathology at London University. He is a regular writer and broadcaster and campaignstirelessly to make sure that we understand why these trees are special and to encourage anyone who will listen to take action on their behalf.Veteran Tree Management and Conservation or Growing downwards: what can we learn fromancient trees and the natural aging process‘An oak tree grows for 300 years, rests for 300 years and then spends the next 300 years gracefully expiring’. Hence the phrase ‘growing downwards’.Growing downwards was a concept developed by the Ancient Tree Forum, a group of Europe-wide specialists andexperts made up of primarily professional arborists, foresters, historians and conservationists. They are concerned about the continued loss of Europe’s old trees.Studying the way old trees age has provided so many insights into how trees grow naturally to maturity, rest andthen decline. This has led to some methods of management preventing collapse such as retrenchment pruningespecially in the management of 1000s of old pollard trees that remain in the UK and other limited parts of Europe.The essential role of decay fungi in the hollowing process has led to the phrase: ‘the co-evolutionary relationshipbetween trees and fungi’. Words such as disease and fungal attack are now disappearing from the arborist’svocabulary.Recognising the fundamental role of other groups of fungi in tree health and longevity, has led to the management and retention of dead standing and fallen trees and they are now much more common in the landscape.

Ken James :

Ken James is an engineer at the University of Melbourne, Australia and has been investigating tree biomechanics and dynamic wind forces on trees for ten years. He currently is conducting research into tree dynamics and has developed new instruments that can measure the wind loads on trees during storms. He has presented papers at the many international conferences including ISA Conferences in America, Tree biomechanics Conference, Savannah, 2001, European Arboricultural Conferences in Maastricht and Oslo, Australia and New Zealand. He has published several papers on tree biomechanics and is currently developing a dynamic structural model to describe tree movement and loads in high winds. Other research interests include structural loads in tree cables and measurement of internal growth stresses in living trees.Tree BiomechanicsThe mechanical properties of trees is being studied to assess the structural strength and stability under a range of conditions. Understanding the structural properties of trees is fundamental to understanding how trees adapt and survive in their environment. Two methods are used, i.e. statics and dynamics. Static tree pull tests apply forces with ropes to simulate wind loading. Dynamic wind measurements are giving us a different understanding of how trees withstand high winds.Tree dynamics and WindHow trees withstand wind forces is being studied using new instruments that monitor the tree under wind stormconditions. Dynamic analysis is providing information on the forces that impact a tree. This information is being used to assess the stability of trees. Recent wind storms in Melbourne are discussed with some case studies that report on wind loading and the assessment of strength.

Dr David Lonsdale:

Dr David Lonsdale is a consultant, author and educator, specialising in the biology, pathology and mechanicalintegrity of trees. After studying at the universities of Southampton and Manchester, he worked for the BritishForestry Commission for 26 years before going freelance in 2002. His research has involved tree diseases and decay, including the role of latent stress dependent fungi. His many publications include “Principles of Tree Hazard Assessment and Management” (1999). He received the Annual Award of the Arboricultural Association in 1999 and an award for Advancement of Knowledge of Arboriculture from the ISA (UK & Ireland Chapter) in 2001.Tree-related hazards: recognition and assessmentA tendency to fall or to shed parts is the main cause for concern about tree-related hazards from trees. Otherhazards, which will not be mentioned further here, relate to obstruction, poisoning, damage to structures caused by tree growth and subsidence or heave of the ground, related to water uptake by tree roots.Everyone with a responsibility for tree safety should be able to recognise signs that may indicate a potential formechanical failure. Someone with specialist skills and knowledge should, if necessary, inspect such signs in moredetail and assess their significance. Options for conducting general and detailed inspections will be discussed here, with reference to the main signs of potential hazard; these can be summarised as follows:Structural ‘defects’ • Bark inclusions (especially at branch unions)• Cracking/splitting of various kinds• Branch subsidence• Crossing and abrading branchesPotential sites of decay initiation• Wounds from pruning or branch failure• Dysfunctional wood in the centre of the root plates of old trees• Bark wounds, above or below ground• Dead branchesSigns of possible weakness due to decay• Cavities• Dead branches• Exposed, decayed wood• Fruiting of decay fungi (often indicating no more than a need for investigation!)There is much interest in devices for aiding the internal mapping of decay, but these should used only by those with a good understanding of the spatial patterns of decay development, both above and below ground. They should in particular be able to interpret the significance of different types of wounds (e.g. wounds that involve only bark loss or wounds that expose sapwood and/or heartwood or ripewood). They should also understand the tendency for coalescence to occur between decay columns arising from a number of wounds.Structurally weak attachments weakened further by decay• Signs of decay at or near included bark unions• Coppice re-growth on decaying stumps• New growth from positions of previous topping or pollardingSite related information• Soil type and hydrology and hence rooting depth (for the tree species concerned)• Cohesion of soil• Topography (especially regarding steep slopes)Past failure of the tree or of similar trees nearby• Signs of past failure that can be observed during inspection• Types of failure that have been documented (or anecdotally noted by local residents).

Dr Elizabeth Philip:

Dr Elizabeth Philip is currently a Senior Research Officer with the Forest Research Institute Malaysia (FRIM). During her 17 years tenure here, she has spearheaded about eight research and development projects dealing with arboriculture and forestry issues. Amongst the issues addressed in arboriculture are growth and development of urban trees, abiotic factors affecting tree growth and urban trees in mitigating changing weather and climatic change.She is a certified arborist by the ISA. In improving the arboricutural practices in Malaysia, she has developed aprotocol for monitoring tree vitality and detection tree heath decline.Dr Philip has published more than 25 papers in referred journals and presented more than 100 working papers. In addition, she sits in a number of technical committees as well.Environmental Influence on the Growth and Development of TreesE.Philip and Y.Noor AzlinForest Research Institute Malaysia (FRIM), 52 109 Kepong, Selangor, MalaysiaMan’s fast paced development has brought about secondary problems like increased pollution, degradation of theenvironment and affected human well-being. The call for combating further environmental degradation has been discussed in many international fora and resulted in Conventions like Biological Diversity and United NationFramework on Climate Change Convention and others. The call for more public parks, green space and conservation of biological resources is getting greater attention in light with the changing climatic scenarios.This paper will highlight the different environmental influence on tree growth. The influence of water stress,temporary flooding, and soil compaction on the growth of urban trees will be discussed. In addition, environmental services provided by urban trees in Malaysia would be also be discussed. Amongst the services provided are natural biological air filters to air pollution and therapeutic. In addition, they acts filter to reduce the heat-island effects in urban areas. Besides, it is a good platform for inter-cultural activities while preserving each identity. Man has very strong linkages with nature and is reflected in the daily activities of our forefathers. Cities and towns have been named after plants.Remember to forward this to other tree care professionals that may find this useful.

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ISAAC MembershipMembership of ISAAC links you to the professional world of practicing arborists and tree managers in Australia. As a member you get discounted entry to ISAAC events, discounts on books and business insurance, as well as the locally produced newsletter 'The Bark'. Full ISA Members also get the ISA's publications 'Journal of Arboriculture' and 'Arborist News'. Membership supports the continued growth in professionalism of arboriculture in Australia. Now is the time to join. If you already are a member, now is the time to recruit someone else.

You can download a membership form right now -"join online.

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Contents of this newsletter are provided for information only and the International Society of Arboriculture, Australia Chapter takes no responsibility for loss or damage resulting from its use. ISA, ISAAC and associated logos are for use by members of the ISA and ISAAC only. (c) 2008 International Society of Arboriculture Australia Chapter Ltd. ABN 77 090 873 644.
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1 comment:

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