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Science of Arboriculture Podcasts



TitleCEUsPrice

This presentation discusses specifics of soil testing, including proper management practices and components to be aware of when testing. Increasingly, the importance of soil testing before prescribing use of fertilizers is recognized, but all soil tests are not created equally; agricultural soil metrics are not appropriate for use in landscapes. Moreover, relevant soil test data can be correlated with careful site observations to learn more about what constitutes sustainable levels of organic matter and nutrient levels. Learning how to interpret soil tests by ground-truthing with site conditions allows arborists and landscape managers to understand how rhizospheres are currently functioning and what, if anything, should be added.

This quiz is worth 0.5 CEU credits. (A, U, T, M, L, Bp)

CEUs for this quiz may be earned only once during the life of your certification.



0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

While aging urban trees provide a wealth of benefits to the residents who live amongst them, they may also begin to pose more risk, and as urban centres become increasingly dense, trees, people and infrastructure often come into conflict. Balancing these competing interests while looking out for the trees can be a real challenge. Today’s arborists can choose from a wealth of methods to better manage and assess the risk of trees. The recently introduced ANSI A300 Part nine describes three levels of risk assessment. By presenting a series of case studies, this talk will focus on how advanced risk assessment methods (Level 3) are being used to better understand the likelihood of failure and to contribute useful information used in the development of conservation management strategies for aging and significant urban trees.

This quiz is worth 0.5 CEU credits. (A, U, T, M, L, Bm)
CEUs for this quiz may be earned only once during the life of your certification.



0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

En esta presentación, Carlos Llanos habla de las intervenciones incorrectas, aplicadas a los árboles en las ciudades y en todas las latitudes, que dañan gravemente a los árboles adultos. A corto plazo, estos árboles no pueden reemplazar las funciones de soporte y nutrición que realizan sus raíces y, mientras el árbol permanezca abierto, hongos, insectos y otros patógenos pueden ingresar a través de los cortes. La improvisación hace que se produzcan varias podas de raíces en el mismo árbol y conduce al colapso del árbol con consecuencias que todos conocemos en algunos casos dramáticos.

Esta prueba vale 0.5 CEU. (A, U, T, M, L, Bs [0.25], Bp [0.25])
Las CEU de esta prueba pueden obtenerse sola una vez durante el período de certificación.

CEU quiz in Spanish. In this presentation, Carlos Llanos describes how the incorrect interventions applied to trees in cities and in all latitudes severely injure adult trees. In the short term, these trees are unable to replace the support and nutrition functions performed by their roots, and, as long as the tree remains exposed, fungi, insects, and a number of other pathogens can enter through the cuts. Improvisation can result in root pruning in multiple places on the tree, which can lead to the collapse of the tree with consequences we're all familiar with in some dramatic cases.

This quiz is worth 0.5 CEU credits. (A, U, T, M, L, Bs [0.25], Bp [0.25])
CEUs for this quiz may be earned only once during the life of your certification.



0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

With the adoption of the newly revised ANSI A300 standard for managing trees on construction sites, the International Society of Arboriculture updated the best management practices. This presentation reviews the new standard and discusses both the science and practice behind the changes. The presentation is highly recommended for arborists who deal with construction protection for tree.
This quiz is worth 0.5 CEU credits. (A, U, T, M, L, Bm)
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

Kaitlyn Pike presents a follow-up to a study exploring the efficacy of a comprehensive tree preservation ordinance. Pike’s study details how surveyed homeowners view trees and nature on their private property and how these views may differ between types of homeowners. The results show that homeowners are largely uninformed about the home development process and its impact on the urban canopy, and that they are even removed from decisions about their own yard. The study covered in this presentation emphasizes the importance of an ordinance that requires tree preservation during construction.

This quiz is worth 0.5 CEU credits. (A, U, T, M, L, Bm)
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

Vegetation management is typically one of a utility’s largest budget items. Presently, identification of high-risk trees near utility lines is labor intensive, time consuming, and costly. In this presentation, Ryan Suttle and Nasko Apostolov share a study that describes a machine-learning approach which trains a novel convolutional neural network (CNN) to automatically classify trees, using only a single photograph and with a high degree of accuracy, into likelihood of failure categories. The CNN’s high degree of accuracy demonstrates the potential of artificial intelligence to automate risk assessment and consequently to reduce costs. Preliminary results are extremely promising for future study and improvement.

This quiz is worth 0.5 CEU credits. (A, U, T, M, L, Bm)
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
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Dr. Nadina Galle is joined by Julietta Sorensen Kass, Founder of Our Nature, to discuss what a tree would say if it could talk, why people find it easier to open up to trees rather than other people, how text messaging can be used to promote human-nature relationships, the ins and outs of her viral Text-A-Tree initiative that saw 3,000 Haligonians send nearly 11,000 texts to 15 different trees, and the tree texts that still bring her to tears.

This quiz is worth 0.5 CEU credits. (A, M, Bm) 
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

Dr. Nadina Galle is joined by Mark Bode and Willem de Feijter, Co-Founders of TreeCollective, to discuss what happens when you combine an urban forester and a business developer, why trees make an essential and valuable contribution to our dense cities, how blockchain technology and tokenization can register the value of trees, monitor their ROI, and help transfer “tree ownership,” and why trees need a business model now more than ever.


This quiz is worth 0.5 CEU credits. (A, M, Bm) 
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

Dr. Nadina Galle is joined by Carlotta Conte, Lead of TreesAI and the Nature-based Solutions Mission at Dark Matter Labs, to discuss what urban forestry gets wrong about carbon sequestration, why trees are assets, not liabilities, how to change "tree accountancy", and how Dark Matter Labs' Trees As Infrastructure (TreesAI) is establishing nature as a critical part of urban infrastructure, alongside bridges, roads, and rail, enabling investment, profitability, and sustainability.

This quiz is worth 0.5 CEU credits. (A, M, Bm) 
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
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Greg King discusses research that utilizes dendrochronology (science of annual tree-ring analysis) to investigate the long-term influence of residential development on tree growth indices. It is an opportunity to compare trees in adjacent green spaces that were not impacted by development. The results will be informative for those interested in a decades-long perspective on the impacts of development on tree growth. 

This quiz is worth 0.5 CEU credits. (A, U, T, M, L, Bs [0.25], Bm [0.25])
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

Kim Coder provides a review of the last decade of research. Coverage will include tree sail, height, size issues, and their impact resisting applied wind and gravity loads. Arboricultural solutions gleaned from biomechanical research will be presented with minimal math and targeted at field applications.

This quiz is worth 0.5 CEU credits. (A, U, T, M, L, Bs [0.25], Bp [0.25])
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars

Dr. Nadina Galle is joined by René Voogt, Founder of ConnectedGreen, to discuss the problems facing newly planted urban trees, why overwatering trees is just as damaging as underwatering trees, why a nuanced understanding of soil biology is critical to applying sensors correctly, and how nearly 2,000 sensors across the Netherlands and beyond are helping landscaping companies, municipalities, nurseries, and water boards transform from reactive to proactive tree care.

This quiz is worth 0.5 CEU credits. (A, M, Bp, Bs) 
CEUs for this quiz may be earned only once during the life of your certification.


0.5 CEU
ISA Members: $9.95
Retail Price: $11.95
All prices in US Dollars
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