13th SAG Workshop

on October 9 th 2017 in Ferrara, Italy


Tree Architecture and Morphophysiology

The shape of trees is the dynamic result of the continuous interaction of every individual tree with the context, even physical, that surrounds it. Tree architecture is the discipline that, defining the principles underlying such interaction, allows to reconstruct the past of a tree, to understand its present and to predict its future evolution.

Through tree morphophysiology it is also possible to relate the architecture of a tree with its biological and functional characteristics, defining the morphological and anatomical relationships that connect the different parts of it. In this way it is possible, for example, to infer the root system organization from the characteristics of the tree’s canopy.

Similarly, it is possible to identify any energetic, hormonal or structural alterations, because the tree architecture would show the consequences of them, or you can evaluate the importance of some symptoms, such as cavities, depending on the indi-
vidual evolution of a tree.

Although the principles of tree architecture and morphophysiology have been studied for more than thirty years, their use at diagnostic and application levels is still very limited. The presentation, from a practical point of view, intends to contribute to highlight this subject.

Dr Giovanni Morelli, agronomist and arborist, owner of Progetto Verde since 1994, is a consultant in in urban arboriculture, specialized in tree risk and tree stability assessment. He has written numerous articles and he is a lecturer in university courses. He has been speaker at more than 60 national and international conferences or seminars. He is a member of the ISA International Society of Arboriculture (ISA), of the SIA (Società Italiana di Arboricoltura), and of SAG Baumstatik e.V.. He is ISA Certified Arborist, ETT – European Tree Technician, Board Certified Master Arborist (ISA) and TRAQ (Tree Risk Assessment Qualification).

The presentation will be held in English language. Translations of questions from English to German or Italian will available upon request.


8:30 – 8:45 Opening, registration
8:45 – 9:00 Welcome, introduction
9:00 – 10:20 Giovanni Morelli: Tree Architecture
10:20 – 10:40 Coffée break
10:40 – 12:15 Giovanni Morelli: Tree Morphophysiology
12:15 – 12:45 Question time
12:45 – 13:30 Lunch break
13:45 – 15:45 Observation of tree architecture in Massari Park
16:00 – 16:30 General discussion, end


On the following day, October 10 th , the Annual General Meeting of SAG Baumstatik will take place in the same venue. The AGM is not open to the public.

language: Italian, English
time: Monday, 9.10.2016, 9:00 am to 4:30 pm
location: Sala Imbarcadero 2 – Castello Estense – Piazza Castello – Ferrara
fees: SAG-members 35.- € for food & beverages
non-members 245.- € plus VAT
early bird 180.- € plus VAT registration before Sept. 9 th
rooms: Hotel Europa, Corso della Giovecca, 49, 44121 Ferrara,
we reserved 20 rooms for SAG workshop participants until the 8 th of September with special prices, www.hoteleuropaferrara.com
registration: or phone +49-89-752150

12th SAG Workshop

on October 4 th 2016 in Nancy, France


Advances in biomechanics and mechanobiology for the diagnostic of urban trees

Over the last 3 decades, the biomechanical inputs for the analysis of urban trees have been largely developed, starting with the seminal works of Lothar Wessolly and Klaus Mattheck. As a consequence, leading experts in the diagnostic of mechanical stability and safety of urban trees are now using techniques of biomechanical engineering such as model of static wind loads on trees and/or static tension-flexion tests.

We would like to make an update and to share ideas with arboriculture experts about novel findings from the biomechanics and mechanobiology research along 3 lines directly related to tree safety: crown reconfiguration in wind, dynamics and compartmentalization of mechanical energy, long term acclimation of trees (see program).

The following exchange between scientists and expert will be on i) how to improve current biomechanical tools for the mechanical analysis of trees and ii) how we may change from punctual diagnosis to longitudinal monitoring and long-term diagnosis.

language English, translations to and from French and German on request
time Tuesday, 4.10.2016, 8:30 am to 5:30 pm
location INRA Centre de Nancy, Rue d’Amance,
54280 Champenoux, France
building and room number to be announced
fees SAG-members only for food and drinks
non-members 245.- € plus VAT
rooms QuickPalace
midway between Nancy and INRA,Ibis

www.hotel-stanislas.fr/ in Nancy

regristration Öffnet ein Fenster zum Versenden der E-Maila.akontz(at)tree-consult.org
or phone +49-89-752150


Download the Invitation with detailed PDF-Program.

11. SAG Workshop

Kommender Workshop:

“Messungen im natürlichen Wind – Einsatzmöglichkeiten für die Beurteilung der Verkehrssicherheit”

am Montag, den 9.5.2016 wird der nächste SAG-Workshop stattfinden.
In Gauting werden wir uns mit dem Thema “Messungen im natürlichen Wind – Einsatzmöglichkeiten für die Beurteilung der Verkehrssicherheit” beschäftigen.

Hier die Einladung mit genauen Details als PDF.

10th SAG Workshop

Ancient Tree Managemnet

will be on the 19th and 20th of October 2015 in Gauting near München

9th SAG Workshop

Our next, the 9th workshop will be on the 2nd of march 2015 in Strassbourg (INSTALLATIONS IN TREES)

The Annual General Meeting will take place on the following day (3rd of March 2015)

More informations and the online-registration will be published at the begin of January 2015.




Workshop 29./30. April 2015 in Eindhoven


Prof. Bert Blocken

1 2