The Institute of Arboriculture Studies Hong Kong

Promoting knowledge & research to protect and preserve Asia’s trees. The non-profit organization drawing together internationally recognized educators for study and in-depth research in modern arboriculture.

2015 Spring Training Programs

The Institute of Arboriculture Studies Hong Kong has long been committed to bringing high-quality educators and serious educational programs to Hong Kong… and now IASHK has a dedicated space as a training home in Fotan. The IASHK Space is conveniently located approximately a 5 minute walk from Exit D at the Fotan MTR Station, 30-32 Au Pui Wan Street, Wah Yiu Industrial Centre, Floor 13, Unit 2. The following training is available this April…

  1. Tree Biology & Tree Biomechanics; What does this have to do with Public Liability?
  2. Documenting Evidence; Practical Guidance for Arborists
  3. ISA Municipal Arborist Certification Exam Training
  5. Various local short workshops in Cantonese; Support Systems, Property Management, & Tree ID…


Tree Biology & Tree Biomechanics; What does this have to do with Public Liability?

Julian Dunster, Mark Duntemann, & Local Hong Kong Lawyer

Location: Institute of Arboriculture Studies Hong Kong Space (IASHK Space)

Date & Time:     20, April Monday 2015                       9:00-5:00

     Full Course Charge:       HK$1290 per person

Early Registration: HK$1160 until April 10, see registration page for discount offer!


(low cost lunches are conveniently available near IASHK Space)


Julian Dunster

of Dunster & Associates Environmental Consultants Ltd. is the primary author for the new Tree Risk Assessment Qualification (TRAQ) Manual & the originator of Tree Risk Assessment Course & Exam (TRACE) which preceded the new ISA Qualification. Dunster is also a Registered Consulting Arborist (RCA), Registered Professional Forester, as well as a Registered Professional Planner. In addition to holding two degrees in forestry, he holds a Doctorate in Regional Planning and Resource Development. Julian has over thirty years of hands on experience from assignments all over the world and has extensive experience representing parties in tree-related liability court cases in North American as well as Hong Kong. He has just published a new book, Documenting Evidence, Practical Guide for Arborists which will debuted at the IASHK Space during Julian’s visit to Hong Kong this April… Julian has also written Arboriculture and the Law in Canada, Preliminary Species Profiles for Tree Failure Assessment, and Dictionary of Natural Resource Management.

Julian designed and implemented the much acclaimed Tree Risk Assessment and Exam (TRACE) course, leading to the designation Certified Tree Risk Assessor. Copies the manual are available for purchase in the publications section of this site. He is also the lead author of the course manual for the Tree Risk Assessment Qualification (TRAQ) launched by the ISA in 2013. He is a fully qualified instructor in both programmes. He has trained arborists in risk assessment in Hong Kong, and all over North America.

Julian has worked on many projects, policy analysis and development, and several high profile environmental impact assessments, including writing the National Guidelines for EIA of Forestry projects in Nepal. He was the lead author of the book Forestry and Assessment. Development of the Class Environmental Assessment for Timber Management in Ontario. He has conducted audits of forestry practices in Chile, and was a member of the audit panel for the FRDA (Forest Resource Development Agreement) project in British Columbia.

In addition to his work as a consulting arborist and land use planner, he also undertakes sophisticated timber and wood testing work for engineers, architects, home owners, and government agencies. Using state of the art technology Julian provides technical reports documenting decay in trees and timber structures. Examples include the famed Hollow Tree in Vancouver, The Kinsol Trestle on Vancouver Island, totem poles, timber framed buildings, piers, docks, and bridges.


Mark Duntemann

of Natural Path Urban Forestry Consultants of Chicago, Illinois is a Tree Risk Assessment Qualification (TRAQ) Approved Instructor and Board-Certified Master Arborist (RM-131B) with vast experience in evaluating trees. Mark has served as President of the Illinois ISA Chapter as well as many research committees with the ISA. Mark has also obtained certification in LANTRA tree risk methodology and holds certification in Quantified Tree Risk Assessment (QTRA). Duntemann is an expert tree assessor with over twenty-five years of experience in urban forestry. He has served as an expert witness and provided testimony in over fifty appraisal, injury and tree-related fatality cases. He specializes in tree forensics, tree value appraisal and operational and management policies associated with tree-related fatalities, personal injuries and property damage. He provides services to an international client base and speaks regularly on tree risk topics including program management. He serves on numerous professional Boards and provides peer review on tree failure and related topics for articles, manuals, guides and publications.

Mark is a member of the American Society of Consulting Arborists (ASCA). He is a past President of the Illinois Arborist Association, the Governor-appointed urban forestry member of the Illinois Council on Forestry Development and a member of the ISA’s Tree Appraisal Review Committee for the CTLA 10th Edition Appraisal Guide. He speaks internationally in such places as Italy and South America on urban forestry policies and tree risk management.

Mark founded Natural Path Urban Forestry Consultants in 1988 while in graduate school to provide urban forestry management and technical support to municipalities across the United States. He has a B.S. in Forest Resources from the University of Montana – Missoula and an M.S. in Urban Forestry from the University of Wisconsin, Madison. Mark’s early career took him through a number of local, regional and State urban forestry positions. He managed the parks for a small Chicago suburb and was the Urban Forestry Specialist the State of Montana. With a keen interest in history, he also served for a time organizing the archives of Glacier National Park and Sequoia National Park.

The business has migrated from a localized company that provided tree inventories to one that now includes international clients. In the past twenty five years, Natural Path has inventoried over 1.5 million trees in over two hundred communities in North America, Europe and South America. The policies that have developed from these projects have allowed Mark to expand his services to tree risk management.

A Local Hong Kong Lawyer may also be part of this workshop and will be announced…

On Monday 20 April, 2015 some of the topics for in-depth consideration of Tree Risk Assessment include:

Defining Tree Risk Thresholds

A key element of risk management often missing in urban forestry is the identification of risk thresholds. Meaning, at what point does risk associated with a certain feature exceed acceptable levels. While the concept of risk management has existed for many years, our profession’s understanding of the topic is still very young. The importance of this limitation is that, as urban forestry managers, most of our tree risk management decisions are driven by the biomechanics of tree failure and catastrophic tree events. Both, of which, may skew our understanding of risk. In this ninety minute session, Mark will outline the underpinnings of risk calculation and provide examples of how this information can be used to inform our municipal tree programs.


Post Failure Bias in Tree Litigation Cases

When a tree part fails causing injuries, the plaintiff has an advantage in litigation because the fact that the incident in question has occurred is not in dispute. Discussion, in part, centers on what the tree owner should have known about the specific tree part in question. Often, the dialogue disregards many important elements of determining risk and the post failure knowledge of the tree part becomes the dominant factor. Additionally, in litigation, an often mistaken view is that every tree part failure results in harm and can be reasonably managed to the point of no risk. This false premise underscores the need for arborists and urban foresters to better understand the real risk present in managing mature trees and how even a reasonable program has a level of risk that must be articulated and accepted.


An Evaluation of Ordinal Risk Rating Systems

With the advent of the ISA’s Tree Risk Assessment Qualification (TRAQ) our professions understanding of risk has matured. Tree risk is the potential for an event happening with some level of negative consequences. We now understand that rather than identifying the part most likely to fail on a tree, every part on a tree has some potential to fail and strike a target. This session will discuss the ordinal rating systems that our profession has historically relied on and the measurement issues that exist in these systems and how they may bias our understanding of risk.


The Larger Context: Risk Assessment and Risk Management      

The risks associated with trees can be managed in many ways. The first step is to understand the process of risk management and risk assessment. Risk management is the overall process in which tree populations and individual trees are reviewed and treated as needed. Risk assessment is one part of risk management. The assessment process documents individual tree conditions and provides a data base of risk issues that need to be managed.

Once a baseline inventory of tree conditions has been established, the process of managing risk is iterative; it relies on risk assessment data being updated as trees are treated, age and deteriorate, or become unstable for any number of reasons.

It is important to separate the two roles of risk management and risk assessment. The manager’s role is to  keep risk issues at an acceptable level within the constraints of public policy, political imperatives, and the available funds. It is not always an easy task to balance costs and benefits in the face of varying opinions about what should or should not be done to any one tree. It becomes more difficult when well-intentioned but often uninformed members of the public loudly insist that they have ‘the answer’ about risk and tree health. Risk managers need to balance the strident noise of the ‘squeaky wheel’ against the quieter sound of well-informed opinion from qualified people.

The assessor focusses on the trees, the targets, and the site conditions. The assessor should be acting independently of political imperatives and should be working on the actual tree, target and site conditions without being constrained by what others think the risk might be. Tree risk assessors should never allow themselves to be bullied or cajoled into producing a risk assessment result designed to match an answer desired by the client, an uninformed public, or politicians. That should also be true for the risk manager, but in practice management is often directed by politicians dictating what is or is not an acceptable risk threshold, and constraining how much time and money is allocated to the task.                     The focus of today’s talks will be primarily of the assessment part.

Risk Assessment Inputs

Tree risk can be assessed at various levels of intensity. Level 1 is a walk by or drive by exercise. It is useful as a relatively fast way to locate the most obvious problem tree. Level 2 is standard visual assessment and examines each tree from the ground, all the way round the tree. This is the most commonly used level of assessment and will usually be enough for most trees. Level 3 is advanced assessment, examining target ratings, site conditions, and parts of the tree in much more detail.

In all assessment levels the critical inputs involve the target and the tree. In the ISA TRAQ scheme these inputs are examined in terms of :
– Likelihood of Failure
– Likelihood of impact
– Consequences

Realistically, the target evaluation comes first of all to see whether or not an assessment is actually needed. If the target is of very low value, or extremely unlikely to include human occupation issues, it may not be necessary to conduct any tree risk assessment. If the tree falls down no damage and no harm will result.

All tree risk assessment has limitations. These include:
– imperfect knowledge
– subjective inputs
– translating visual assessment to assumed implications
These issues will be examined in more detail to show how a balance can be achieved between retention and removal.
Understanding Likelihood of Failure

Assessing the likelihood of any one tree part or the whole tree failing requires a very sound knowledge of tree biology and tree mechanics. Key factors to understand include two fundamental principles:
1    Know what to look for
2    Know what you are looking at

To implement these principles the assessor must understand the concept of baselines and the biomechanically perfect tree, as well as be able to examine trees and ‘read’ them accurately in order to predict which part of the tree is most likely to fail within a specified future time frame.

Reading the tree involves knowledge of species-specific characteristics, past failure patterns matched with site specific conditions and weather patterns, and learning about indicators on and in a tree that help to highlight possible internal problems affecting stability. In this module we will review the main factors likely to be of importance and show how assessors can utilise them to be create better assessments.
Who should attend?

  • Anyone who deals with assessing trees for risk and potential hazardous conditions…
  • Anyone who needs to understand tree structural makeup and how it relates to safety…
  • Anyone who wants to understand how tree biology and structure are related to risk…
  • Anyone who is in management of trees or others who must regularly observe trees…
  • Anyone who must gather information and data to prepare effectual reports on trees…
  • Anyone who intends to advance their professional arboriculture practice to the next level…


LECTURE:          Documenting Evidence; Practical Guidance for Arborists

Dr. Julian A. Dunster


Location: Institute of Arboriculture Studies Hong Kong Space (IASHK Space)

Date & Time: 21, April Tuesday 2015        9:00-5:00       

Early Registration: HK$1260 until April 10,            see registration page for discount offer!

Full Price:      HK$1400 per person (HK$300 for Evidence book; normally HK$398)

CEU VALUE: 7                                  (low cost lunches are conveniently available near IASHK Space)





                                   DUNSTER & ASSOCIATES

                                                                   Environmental Consultants Ltd.


Documenting Evidence

Arborists routinely examine trees for health and risk. The assignment may involve site review, or checking a tree before pruning or removing it. Perhaps it involves collecting data to report about appraisal of damage or trespass issues, or forensic investigations about injuries caused by falling trees.

This course covers the professional practice of recognizing and understanding evidence, and learning how to effectively use it in reports. It applies to tree care companies and climbers, municipal, utility, and consulting arborists – anyone working with trees who may later need to explain what was done on any given day.

In every case, from the routine to the unusual, the arborist needs to clearly understand the practical and intellectual process of documenting what was seen on site. That is then translated into a written (or verbal) description identifying:

  • what was seen,
  • how it was considered and interpreted,
  • what the likely implications are, and
  • opinions about how best to proceed.

Regardless of the assignment, the process needs to be systematic collect, analyse and interpret evidence, record keeping, and photography, and how to assemble all of that into a well ordered report.

In this course we will examine all of these stages and learn how to effectively implement two key principles:

  • Know what you are looking for.
  • Know what you are looking at.

Topics covered include how to systematically collect, analyse and interpret evidence, record keeping, and photography, and how to assemble all of that into a well ordered report.

Before the course, participants are encouraged to submit case studies for class discussion. Selected examples will be used in the PowerPoint presentation.

The book will be made available at a reduced price for those who attend;

HK$300.00 (Regularly HK$398.00)


Registrants for the course are encouraged to submit a case study for discussion in class.

The case studies selected will be presented by Julian Dunster with input from the submitter. You may submit up to three case studies. For each case study try to put together the following details.


The assignment

– What were you doing? Preparing an estimate? Assessing tree risk? Tree Health?

What you saw on site

– Describe it for us and explain why it was important

How you analysed and interpreted what you saw

– What process did you use? Were any tools involved? If so tell us about how you used them and why.

What were your conclusions / opinions about what you found?

– Describe them

What did you recommend and why?

-Tell us why you selected that recommendation

-Tell us what you learned from the case?

We will have about ten minutes for each case study. Four or five of the submissions will be selected and discussed in class.

For each submission we will need:

4 or 5 power point images showing the exact issue to be discussed. Start with a broad shot of what attracted your attention, then move down to details, and if possible, show us what you found after investigation. Keep the images simple and clear.

Once you have registered and paid for the course you will be free to contact Julian Dunster in advance if you have questions or want help to prepare effectively for the workshop.



Recent Training at IASHK Space

In addition to the HK ISA Chapter regularly holding their monthly meetings, two full Tree Risk Assessment Qualification (TRAQ) course were conducted

10-15 November, 2014


TRAQ Offered by the ISA Hong Kong Chapter in May

Is your TRA certification expiring soon? Then you should consider responding immediately to register…

TRAQ Course and Exam

(30 April – 2 May 2015 and 4 May – 6 May 2015)

The ISA Hong Kong Chapter has organized the TRAQ Tree Risk Assessment Qualification (TRAQ), Course and Exam in Hong Kong in May this year:

Two Classes are offered in May:

(Class A & B) in May 2015  

Class A

Trainer: Don Picker

Date: 30 April (whole day), 1 May (whole day), 2 May (am) 2015

Time: 9am – 6pm

Max. Class size: 20 ppl

(Priority is given the existing TRAQ/TRACE holders whose qualification is expiring soon)

Venue: No.2 13/F Wah Yiu Industrial Centre,30-32 Au Pui Wan Street, Fo Tan, Sha Tin, NT


Class B (open only when Class A is full)

Trainer: Don Picker

Date: 4 May (whole day), 5 May (whole day), 6 May (am) 2015

Time: 9am – 6pm

Max. Class size: 20 ppl

(Priority is given the existing TRAQ/TRACE holders whose qualification is expiring soon)

Venue: No.2 13/F Wah Yiu Industrial Centre, 30-32 Au Pui Wan Street, Fo Tan, Sha Tin, NT



BOOK DEBUT by the Institute of Arboriculture Studies Hong Kong; April 2015:



   The book is available for HK$398.00 from the IASHK, plus HK$25.00 shipping fee.


LECTURE: ISA Municipal Arborist Certification Exam Training

                                 Mark Duntemann of Natural Path Forestry Consultants


Location: Institute of Arboriculture Studies Hong Kong Space (IASHK Space), Fotan

Dates: (2 Days) April 22-23, Wednesday & Thursday 2015

Full Price: HK$2990, after April 6

Early Registration Deadline and Discount: April 10, 2015, HK$2660

Time: 9:00-6:00 daily (low cost lunches are conveniently available near IASHK Space)

Final Registration Deadline to purchase a book: April 10, 2015

CEU VALUE: 15                                   See registration page for discount offer!

This two-day workshop must have a minimum registration of 10 people.


Please note a minimum of 10 must register. This course does not include the actual examination and examination cost. The examination can be taken through the Hong Kong ISA Chapter or at a testing centre. Prerequisite: Anyone can attend but be aware you must be an ISA Certified Arborist for 3 years in order to apply to take the exam.

Who should attend?

  • Anyone who is involved in modern arboriculture in the urban areas
  • Any Certified Arborist who desires to advance to a level of management in their career
  • Arborists who would like to become the leaders of Arboriculture in urban Hong Kong



ISA – Municipal Specialist Certificate Training

Course Agenda

(as provided for the Illinois Chapter of the ISA)

This two-day class will cover in detail all nine chapters of the Municipal Specialist Study Guide. Each session will include a review of chapter objectives and key terms. The end of each session will include a class participation component on each Chapters workbook and challenge questions.

Day 1


9:00     Municipal Arboriculture and Urban Forestry

This opening session will differentiate arboriculture, the care of individual trees, with urban forestry, the management of a system

10:30   Planning the Urban Forest

          Planning involves the systematic approach to managing a resource. This session details elements of the four components to the  planning process: What do you have? What do you want? How do you get what you want? Are you getting what you want?

12:30   Lunch

1:30     Assessing and Quantifying the Urban Forest

             Information is the cornerstone for making good urban forestry policy choices. This session details the various approaches to assessing the urban forest and the ramifications of the information collected

3:30     Planting the Urban Forest

             A core philosophy of urban forestry is sustainability. An important element of sustainability is perpetuating tree presence in the urban forest. This session details the range of approaches to tree planting.

5:30-6:00         End of Day

Day 2


9:00     Maintaining the Urban Forest

       The primary goal of the urban forester is to maintain a system that is healthy, safe and expanding. It is from meeting this goal that residents of cities obtain the most environmental, aesthetic and economic benefits from trees

10:00   Managing Risk in the Urban Forest

           Managing risk in large urban systems is a complex task. This session covers the different components of implementing a reasonable tree risk management program

12:30   Lunch

1:00     Protecting the Urban Forest

             Urban trees are managed in the built environment. This setting presents an environment that is in most situations hostile to   maintaining healthy trees. This session discusses the urban factors that affect trees and methods for minimizing the negative impacts from construction

2:30     Administrative Duties of the Municipal Arborist

            The final session of this course will detail the numerous operational and management duties for the person or department tasked with overseeing the different components of the urban forestry program

4:30     Municipal Specialist Exam

              Discussion and sample of the multiple choice exam of 115 questions covering the topics over the two days will be conducted in order to provide an approximation of the certification exam.

5:30-6:00         End of Day



Why should you attend the Municipal Specialist Program of training?

Following acknowledgement by Phoebe Liu                ISA Certified Arborist/ Municipal Specialist in Hong Kong

The Municipal Arborist Certification program provides the foundation for better tree management in Hong Kong. Many arborists have not yet pursued it, but having completed the programme I think it is very important and valuable. It takes arboricultural practice to a higher level; beyond skills and knowledge for performing tree care routines, diagnosis and tree risk assessments. It is about the planning, design, management, maintenance and administration of urban forests and publicly-owned trees, and also handling public relations on tree management issues.

If you are an arborist working in a landscaping section in Government departments, are required to manage a very large number of trees within a district and must respond to public enquiries and complaints, getting trained and qualified as a Municipal Specialist suits exactly what you need.

The knowledge of urban forest planning, design and management may also be useful for landscape consultants in providing solutions in master planning, tree preservation and tree-friendly designs in land development; while landscape managers in private properties may find this helpful in organizing better tree maintenance programs.

The Municipal Specialist Certification Study Guide is a well-written book that elaborates theories and concepts with numerous real-world cases and examples to facilitate the readers’ understanding. Even though some content is not fully applicable to Hong Kong situations, I have enjoyed reading the book and found those concepts useful in my consultancy work.

The exam consists of 100 multiple choice questions which can put your past working experience with trees to a real big test. Candidates who are not familiar with the practices of the arboricultural industry, and North American municipal organization structures and conditions may find it a bit more challenging. A tip here for people who want to take this exam: It is ALMOST IMPOSSIBLE that you can find straight answers in the Certification Study Guide and in any of the reference readings! The exam questions are indeed testing your logical thinking, common sense and the mastery of concepts instead of your ability to memorize study materials.

Good Luck!

Phoebe Liu

Click here to read more about the certification at the ISA website.

Municipal Specialist Certification Study Guide

By Nelda P. Matheny and James R. Clark

  • ISA Web Item #: MS1003
  • Member Price: $59.95
  • Retail Price: $69.95
  • Price does not include shipping

Note: If you intend to register for the course you will also need to consider purchasing the Municipal Specialist Certification Study Guide; an informative book whether you take the exam or just use it for reference to understand the primary and universal principals in urban tree management. If you are attending the course and want to order the Study Guide we can help you to obtain the book with the early registration.

  • Order guide with Course Early Registration; by April 10 including shipping, HK$595.00 (member/non-member)
  • Order guide after early registration and shipping time is not guaranteed; HK$695 (member/non-member)



[email protected]



Two-Day Training Workshop

With Mark Duntemann, Natural Path Urban Forestry Consulting Arborist, BCMA R-113B



Examination Eligibility Requirement
To sit for the BCMA exam, you must be an ISA Certified Arborist® in good standing and have obtained a total of (8) eight points from any or all of the four categories that include measurable experience, formal education, related credentials, or professional experience.

*Category A—ISA Certification Program:
ISA Certified Arborist®…………………………………………………….1 point for each year certified
ISA continuing education ………………………………………………….1 point for every 60 CEUs over the required 30 every three years
Municipal Specialist………………………………………………………….1 point
Utility Specialist……………………………………………………………….1 point
ISA Certified Tree Worker/Climber Specialist™………………….1 point

*Category B—Formal Education: Based on highest level of degree obtained in arboriculture or related field.
Two-year associate’s degree or equivalent ………………………….1 point
Four-year undergraduate degree or equivalent …………………….2 points
Master’s or equivalent terminal degree ……………………………….3 points
Ph.D. or equivalent graduate degree …………………………………..4 points

*Category C—Verifiable Related Credentials:
ASCA Registered Consulting Arborist……………………………………3 points
SAF Certified Forester………………………………………………………….1 point
State license or certification in arboriculture or urban forestry….1 point
European Certified Tree Worker …………………………………………..1 point
TCIA Professional Tree Care Specialist program completion…..1 point

*Category D—Professional Work Experience:
Years of experience in arboriculture …………………………….1 point every six years

*Proof of the above must be in writing, such as a copy of a certificate and original transcripts or letter from a certifying agency. These must be submitted with your application for approval. By submitting your application, you authorize ISA certification staff to contact the practical experience reference named on your application to substantiate your eligibility.


ISA Board-Certified Master Arborist

Exam Preparation Course


This two day comprehensive course is designed to address all of the main components covered in the ISA Board-Certified Master Arborist exam. The discussions focus on the three domains which are included in the BCMA body of knowledge: biological sciences, practice, and management. Format will focus on training participants to apply critical thinking in a range of diverse scenarios. This course is worth 14 full CEUs.



Biological Sciences    

Discussion covers tree structure and physiology with an emphasis on the tree as an integrated system.

Soil Science    

Areas of focus will include soil texture, structure and morphology and the ramifications of each on tree health and physiology.

Plant Identification and Selection     

Discussion will focus on methods for gross anatomy identification, followed by an overview of tree forms, and concluding with species selection that are compatible for the site.

Abiotic Influences      

External issues that are typically human created that affect tree health. How do we identify them and options for correcting them will be discussed.

Biotic Influences

This session will cover a full range of insect and disease concerns that are universally at issue for maintaining tree health.

Diagnostic Processes 

A template for implementing a systematic process to evaluate internal and external, tree-specific and site specific issues will be discussed



Installation Practice  

Whether a tree lives into maturity begins with its installation. This session outlines the appropriate techniques for site considerations, proper installation and after planting care.

Water Management  

Available water is a critical component for tree survival, especially in the establishment phase of a tree. Discussion will center on identifying water deficiencies and processes for modulating available water.

Soil Treatment                       

Urban soils can, at times, be inadequate for tree health. Discussion will focus on analyzing soils for mineral deficiencies and structural issues and corrective measures that can be implemented.



Pruning is carried out to meet a number of objectives. They range from health to aesthetic and safety issues. The discussion will cover the types of pruning techniques and what their purpose serves.

Climbing, Rigging, and Removal

Arboricultural practices are the center of this session. Discussion will detail techniques and considerations in each of the three topic areas.

Integrated Pest Management

IPM requires accurate diagnosis of site and pathology threats and then strategies for maintaining tree health and appropriate treatments.

Support and Protection

Session will detail the processes for determining appropriate support systems for a tree being assessed. Topics include tree evaluations to consider and the types of systems to consider.



Inventory and Management Plans

Session begins with a discussion on the mechanics involved with the design and implementation of a tree inventory and concludes with how the data is used to develop operational to strategic management plans.

Risk Assessment        

Risk is the potential for a negative event occurring. This session discusses this concept and how it applies to trees. Provides an overview of identifying tree parts likely to fail and the likelihood of a failure striking a target and causing harm.


As arborists, consultants and municipal managers, working with trees is inherently risky. This session will review safety considerations and protocols for working in and around trees.

Plant Appraisal

The mechanics of carrying out tree appraisals based on the Council of Tree and Landscape Appraisers (CTLA) Guide to plant appraisal will be detailed.

Tree Preservation

Trees that exist in the built environment have an increased range of site and environmental impacts that diminish their vigor. The session will discuss these impacts and cultural practices that can be implemented to minimize their impact.

Business Relations

The concluding session of the course will discuss the professional and ethical standards required of us in arboriculture and how that translates to our interaction with employees and the public.



Applied Tree Support Systems, the Proper Application of Dynamic Cobra Support

Leon Lau of the Hong Kong Tree Society

Location: Institute of Arboriculture Studies Hong Kong Space (IASHK Space), Fotan

Dates: May 2, Saturday 2015

Full Price: HK$380

Time: 9:30-12:30 NEW TIME 14:30-17:30            (following TRAQ)

Final Registration Deadline: April 10, 2012

CEU VALUE: 3                                              Call office for potential 10+ group discount offer, 2669-5126!



Tree ID in Hong Kong; Meetings with Flowers, Fruits, & Leaves

Leon Lau of the Hong Kong Tree Society

Location: Institute of Arboriculture Studies Hong Kong Space (IASHK Space), Fotan

Dates: 9 May, Saturday 2015

Price: HK$390

Time: 9:00-1:00

Final Registration Deadline: 24 April, 2012

CEU VALUE: 4                                                      Call office for potential 10+ group discount offer, 2669-5126!


Call for Presentations for the IASHK November

Educational Gathering in Hong Kong

The International Arboriculture Summit – Hong Kong conference will be held this November.  The theme of this year’s talks is Inside the Tree.  “The Benefit of Trees in Our Concrete Jungle”.  We welcome individuals in the region to submit their presentations, especially in the areas of Special Trees or Landscapes in Asia, Biology for Tropical Asia, or other appropriate topics with the local regional aspects in mind.  The time slots for speaking at the conference will be either 30 or 45 minutes. Presentations will be evaluated based on overall quality, appropriateness and timeliness of topic, well-defined focus, practical application of material, and the subject’s interest to a diverse audience.                                                   This call for presentations will close on 29 May, 2015.
Please submit your presentations to [email protected]
Thank you for your interest.

8th annual

2015 International Arboriculture Summit – Hong Kong

The Benefits of Trees in Our Concrete Jungle

November 18-20, 2015

Keynote Educator:

Professor Cecil Cornelis Konijnendijk

With Richard Hauer of the University of Wisconsin, Stevens Point &

Francesco Ferrini of University of Florence Italy, others soon to be announced…

Hosted by:

watch for a new venue to be announced for this year’s summit