Talking Trees

In this Friday episode of Talking Trees , we celebrate the legacy and ongoing impact of the International Society of Arboriculture (ISA)—the world’s leading organization dedicated to advancing the profession of arboriculture. We explore: The history of ISA, which celebrated its 100th anniversary in 2024 The evolution of its scientific journal from the Journal of Arboriculture to Arboriculture &amp...

In this Friday episode of Talking Trees , we celebrate the remarkable career of Dr. Mark Johnston, a pioneer in urban forestry whose life’s work has shaped tree care across the UK and beyond. Drawing from his autobiographical reflections in the 2024 TREES e-book, this episode offers a personal and professional journey through decades of dedication to arboriculture. We explore: Mark’s early life an...

This is your weekly summary of the Talking Trees podcast – bringing you expert insights and practical knowledge from Monday to Saturday. Here’s what we covered this week: 🌱 Monday 121 - Function of Assimilation Apparatus We explored the role of the assimilation apparatus – leaves and needles – in photosynthesis and stress adaptation. Learn how tree anatomy supports vitality, how morphology reflec...

In this episode, listeners meet renowned arboricultural expert David Lonsdale. David shares his inspiring journey and extensive experience, discussing his insights on tree pathology, tree risk assessment, and management strategies that promote healthy urban forests. He provides practical knowledge blended with anecdotes from his long career, highlighting the importance of continuous learning and a...

This is your weekly summary of the Talking Trees podcast. Let’s revisit the fascinating episodes we explored this week: 🌱 Monday 114 - Pulleys and Friction Rings We kicked off the week with a look at the essential climbing gear—pulleys and friction rings. We discussed their functions, differences, and best use cases in tree work. 🧗 Tuesday 115 - Stockholm Soils On Tuesday, we explored the divers...

In this episode of Talking Trees , we pay tribute to Dr. Alex Shigo, the father of modern arboriculture. His groundbreaking research on tree biology, particularly the CODIT model (Compartmentalization of Decay in Trees), revolutionized how arborists understand and care for trees. We discuss: His pioneering work at the U.S. Forest Service The shift from wound "healing" to compartmentaliza...

Welcome to this week's recap of Talking Trees, where we summarize the key insights from Monday to Saturday. Let’s dive into what we covered this week! 🌱 Monday 107 - Hirons - Applied Tree Biology We explored the essential principles of tree biology as outlined in Dr. Andrew Hirons' book Applied Tree Biology . Topics included tree anatomy, root functions, responses to pruning, climate ad...

In this special episode of Talking Trees , we highlight the International Day of Forests and its significance in promoting global awareness of forest conservation. Established by the United Nations, this annual event encourages efforts to protect and restore forests worldwide. We also explore the Singapore Biodiversity Index, a tool designed to measure and monitor biodiversity conservation efforts...

Welcome to this week's recap of Talking Trees, where we summarize the key insights from Monday to Saturday. Let’s dive into what we covered this week! 🌱 Monday 100 - Ecobenefits and Disservices of Trees We explored the balance between the benefits and challenges of trees in urban and natural environments. While trees provide essential services like carbon sequestration and air purification,...

Welcome to this week's recap of Talking Trees, where we summarize the key insights from Monday to Saturday. Let’s dive into what we covered this week! 🌱 Monday 093 - Lifespan Approach to Tree Care We explored the concept of lifespan tree care, discussing best practices from planting to maturity. The episode covered strategies for young tree establishment, mature tree maintenance, and veteran...

In this episode of Talking Trees , we explore the best practices for mistletoe management, a critical aspect of tree care in urban and natural landscapes. While mistletoe ( Viscum album ) plays an essential role in biodiversity, excessive infestations can weaken host trees, reducing their vitality and increasing susceptibility to pests and diseases. We discuss key mistletoe control strategies, inc...

Welcome to this week's recap of Talking Trees, where we summarize the key insights from Monday to Saturday. Let’s dive into what we covered this week! 🌱 Monday 086 - Mistletoe General We explored the fascinating ecology of mistletoe, a parasitic plant that plays a crucial role in forest ecosystems. The discussion covered how mistletoe interacts with its host trees, its impact on tree health,...

Welcome to this week's recap of Talking Trees, where we summarize the key insights from Monday to Saturday. Let’s dive into what we covered this week! 🌱 Monday 079 - Epicormic Shoots, Reiteration We explored how trees use epicormic shoots and reiteration to adapt to stress and environmental challenges. The discussion covered their role in survival, regeneration, and structural stability, as...

In this episode of Talking Trees , we explore the work of Doctor Árbol, a leading Spanish arboriculture consultancy specializing in tree risk assessment, urban forestry, and transplanting. As Spain’s urban areas grow, tree management has become a crucial aspect of sustainable city planning, and Doctor Árbol is at the forefront of ensuring tree safety and health. We discuss key services offered by...

Welcome to this week's recap of Talking Trees, where we summarize the key insights from Monday to Saturday. Let’s dive into what we covered this week! 🌱 Monday 072 - Water Transport and Balance We explored the fascinating mechanisms behind water transport in trees. The discussion covered how trees move water from roots to leaves through cohesion, adhesion, and transpiration, as well as new r...

In this episode of Talking Trees , we explore the work and mission of the Ancient Tree Forum (ATF), a UK-based organization dedicated to the protection, management, and conservation of ancient and veteran trees. Established in 1993 by a group of arboricultural experts, the ATF promotes best practices, supports research, and engages with policymakers to ensure the survival of these irreplaceable tr...

Welcome to this week's recap of Talking Trees, where we summarize the key insights from Monday to Saturday. Let’s dive into what we covered this week! 🌱 Monday 065 - Phytohormones We explored the role of phytohormones in tree development, stress response, and growth regulation. The discussion covered key hormones such as auxins, gibberellins, and cytokinins, highlighting their biochemical pa...

This episode highlights the work of Instytut Drzewa, a Polish organization dedicated to tree care education and consulting. It discusses their training programs, online courses, and professional development initiatives for arborists. The institute's involvement in international projects for arboricultural standardization and qualification improvements is also explored. The episode emphasizes...

Welcome to this week's recap of Talking Trees, where we summarize the key insights from Monday to Saturday. Let’s dive into what we covered this week! 🌱 Monday 058 - CODIT Model and Principles This episode explored how trees compartmentalize decay using the CODIT model. We discussed the formation of barrier zones, the biochemical processes that help trees isolate infections, and the practica...

This week's Talking Trees recap delves into various aspects of trees and forest ecosystems: 🌱 Monday 51 - Wood Wide Web The week began with a fascinating discussion about the "Wood Wide Web," an underground fungal network that connects trees, facilitates nutrient exchange, and promotes forest resilience. 🧗 Tuesday 52 - Anchor Point Selection We explored how to select anchor points...

This week's Talking Trees recap dives into a variety of engaging topics, shedding light on the intricate world of trees and their care: Monday 44 - Anatomy and Biomechanics of Wood and Forks We began the week exploring the anatomy and biomechanics of wood and tree forks. Topics included reaction wood, water transport through the xylem, and the structural adaptations that enhance tree stabilit...

This week's Talking Trees recap brings together a variety of captivating topics related to tree care and management: Monday 37 - Meristems We explored the essential role of meristems, the plant tissues responsible for growth. The episode highlighted their importance in primary (lengthening) and secondary (thickening) growth, along with how hormonal regulation and genetics control these critic...

In this episode of Talking Trees, we discuss the first European Tree Worker (ETW) exam held in Hong Kong, which highlighted significant gaps in local training and skills. The exam, covering both practical and theoretical modules such as tree identification, pruning, and Visual Tree Assessment (VTA), revealed that Hong Kong arborists fall short of international standards. Sammy Au, the author of th...

Welcome to the Sunday recap episode of Talking Trees, where we summarize the key insights from this week’s episodes. Let’s review what we covered from Monday to Saturday: Monday 30 - Mycorrhiza and Root Symbiosis We delved into the fascinating world of mycorrhiza, the symbiotic relationship between fungi and plants. We explored different types of associations, such as ectomycorrhiza and arbuscular...

In this episode of Talking Trees , we highlight the work of Professor Francesco Ferrini, a leading expert in urban arboriculture whose research focuses on the impact of trees on air pollution and their adaptation to urban environments. We also discuss the European Arboriculture Conference held in Prague on February 13–14, 2025, which covered various aspects of tree care, including tree assessment,...