In this Saturday episode of Talking Trees , we examine the findings of the European Red List of Trees, a landmark IUCN-based assessment revealing that nearly 42% of Europeās native tree species are threatened with extinction. We discuss: The major threats contributing to this crisis, including invasive species, habitat loss, poor land management, and deforestation Geographic trends and country-level data, showing where conservation challenges are most acute The critical role of ex situ conservat...
May 18, 2025ā¢13 minā¢Season 2025Ep. 168
In this Friday episode of Talking Trees , we turn our attention to the Czech Republicās ArboristickĆ” akademie, a leading platform for education, certification, and outreach in the field of arboriculture. We discuss: The Academyās role in promoting care for trees in non-forest environments, combining science, practice, and communication Its wide range of activities, including seminars, workshops, national and international certifications, and professional development courses The importance of acc...
May 16, 2025ā¢9 minā¢Season 2025Ep. 167
In this Thursday episode of Talking Trees , we spotlight a practical digital tool developed by Tim Moya Associates (TMA)āa free mobile app designed to help arborists and tree managers identify wood-decay fungi on trees in the UK. We discuss: How the app simplifies fungi identification through intuitive menus, photos, and information on decay type, host species, and ecological role Its value for field-based arborists, consultants, and students seeking fast, reliable fungal data TMAās broader work...
May 15, 2025ā¢10 minā¢Season 2025Ep. 166
In this Wednesday episode of Talking Trees , we explore how thoughtful tree species selection is essential for building resilient green infrastructure in cities facing climate change, soil limitations, and urban stressors. We discuss: Why tree selection should be based on site-specific conditions, including soil compaction, heat exposure, and rooting space Tools and frameworks for choosing species, including guides that rate trees by drought tolerance, flood resilience, and ecosystem service pot...
May 14, 2025ā¢12 minā¢Season 2025Ep. 165
In this Tuesday episode of Talking Trees , we dive into the world of friction hitches, essential tools for climbers that provide control, safety, and flexibility during ascent and descent in tree work. We discuss: How friction hitches function by gripping the rope under tension while allowing easy adjustment when unloaded Popular hitches like the Prusik, Blake's Hitch, Valdotain Tresse (VT), JRB, and Longhorn, and how each performs under different climbing systems (Ddrt and SRT) How to match hit...
May 14, 2025ā¢20 minā¢Season 2025Ep. 164
In this Monday episode of Talking Trees , we explore how urban trees respond to rising temperatures and what determines their heat resistance in the face of climate change and the urban heat island effect. We discuss: The physiological and biochemical effects of heat on trees, including impacts on photosynthesis, respiration, and water regulation Methods to assess heat tolerance, from leaf-level tests to remote sensing technologies Why urban trees are particularly vulnerable due to limited rooti...
May 12, 2025ā¢16 minā¢Season 2025Ep. 163
This is your weekly summary of the Talking Trees podcast! š± Monday 156 - Transpiration, Evaporation and Interception We explored three key water-related processes in treesātranspiration, evaporation, and interceptionāand how they influence tree health, microclimate regulation, and the hydrological cycle. š§ Tuesday 157 - Personal Fall Protection Systems We discussed climbing safety systems, focusing on moving and stationary rope techniques, backup anchor systems, and the importance of proper eq...
May 11, 2025ā¢10 minā¢Season 2025Ep. 162
In this Saturday episode of Talking Trees , we take a closer look at the Cerambyx cerdo, also known as the great capricorn beetleāa striking and ecologically significant member of the longhorn beetle family. We discuss: Its scientific classification and broad geographic range across Europe, Asia, and North Africa, with historic extinction noted in the UK The beetleās distinctive appearance, including body size, dark coloration, and the notable difference in antenna length between males and femal...
May 10, 2025ā¢20 minā¢Season 2025Ep. 161
In this Friday episode of Talking Trees , we pay tribute to one of the most influential figures in modern arboricultureāProf. Dr. Dirk Dujesiefken. His career has shaped the way we understand, teach, and care for trees in urban environments across Europe. We discuss: His early fascination with nature protection and the urban role of trees, which led him from studying wood to researching living trees and tree care systems The founding of the Institute for Tree Care and its three central pillars: ...
May 09, 2025ā¢16 minā¢Season 2025Ep. 160
In this Thursday episode of Talking Trees , we delve into the use of acoustic tomographyāspecifically the PiCUS Sonic Tomograph and TreeTronic systemsāfor diagnosing hidden internal decay in trees. We discuss: How sound waves and electrical resistance are used to map internal wood structure without damaging the tree The key steps in setting up, calibrating, and interpreting tomograms, including common challenges like the ācogwheel effectā Insights into the biology of wood-decay fungi and how tom...
May 08, 2025ā¢30 minā¢Season 2025Ep. 159
In this Wednesday episode of Talking Trees , we explore the principles and practices of dynamic tree cabling, a system designed to enhance tree stability while allowing natural movement and growth. We discuss: The difference between dynamic and static cabling systems, and when dynamic solutions are most appropriate Key installation principles such as placement height, tension calibration, and selection of appropriate materials How dynamic systems absorb energy and reduce mechanical stress, helpi...
May 07, 2025ā¢16 minā¢Season 2025Ep. 158
In this Tuesday episode of Talking Trees , we dive into the essentials of Personal Fall Protection Systems (PFPS) used in modern arboricultural climbing and aerial rescue operations. We discuss: The two primary climbing techniques: Moving Rope Technique (MRT), where the rope moves over an anchor point, and Stationary Rope Technique (SRT), with a fixed rope setup The structure of a fall protection system, which includes a main line and a backup system, both critical to minimize the risk of a fall...
May 06, 2025ā¢12 minā¢Season 2025Ep. 157
In this Monday episode of Talking Trees , we explore three essential water-related processesātranspiration, evaporation, and interceptionāthat shape how trees interact with their environment and regulate the water cycle. We discuss: Transpiration, the movement of water from roots through the plant and its release as vapor from leaf surfaces, driven by sunlight, humidity, and stomatal activity Evaporation, the transformation of water from liquid to vapor at exposed surfaces such as soil, bark, or...
May 05, 2025ā¢13 minā¢Season 2025Ep. 156
This is your weekly summary of the Talking Trees podcast ā diving deep into tree biology, gear, policy, soil, and society. Hereās what we explored this week: š± Monday 149 - Osmosis and Root Function We kicked off the week by examining how osmosis and root structure support water uptake and nutrient transport. From soil macropores to seaweed-based biostimulants, this episode provided practical insights for improving tree establishment and root resilience. š§· Tuesday 150 - Tree Climbing Spikes Tu...
May 04, 2025ā¢11 minā¢Season 2025Ep. 155
In this Saturday episode of Talking Trees , we turn our attention to the human dimension of biodiversity protection, exploring how public attitudes shape conservation outcomes and the role arboriculture plays in supporting a healthy social-ecological system. We discuss: A national study from Spain revealing that the general population holds a strong pro-conservation stance toward protecting threatened flora Survey insights into public willingness to support government spending, and even limit de...
May 03, 2025ā¢13 minā¢Season 2025Ep. 154
In this Friday episode of Talking Trees , we explore the soil microbiome as a critical but often overlooked driver of tree health, biodiversity, and ecosystem resilience. Far beyond just a substrate for roots, soil is a living, dynamic system influencing the entire tree environment. We discuss: How soil microbial communities support nutrient cycling, disease resistance, and plant growth through complex interactions The concept of soil health as a foundational element of the One Health frameworkā...
May 02, 2025ā¢15 minā¢Season 2025Ep. 153
In this Thursday episode of Talking Trees , we focus on the global threat posed by Phytophthora species, aggressive plant pathogens that have devastated forests, gardens, and natural landscapes worldwide. We discuss: The biology and life cycle of Phytophthora fungi-like organisms, including their ability to spread through water, soil, and infected plant material The impact of Phytophthora ramorum and Phytophthora kernoviae in the UK, with studies estimating significant public value at risk acros...
May 01, 2025ā¢13 minā¢Season 2025Ep. 152
In this Wednesday episode of Talking Trees , we explore the newly updated guidance from the National Tree Safety Group (NTSG) on applying common sense risk management to trees. Balancing public safety with the immense environmental and social benefits of trees is at the heart of this approach. We discuss: Why the overall risk from trees is very low, but still requires responsible, proportionate management Key legal frameworks involved, including the Occupiersā Liability Acts and the Health and S...
Apr 30, 2025ā¢16 minā¢Season 2025Ep. 151
Tree climbing spikes, also known as spurs, are essential tools for specific arboricultural operations but come with important considerations. In this Tuesday episode of Talking Trees , we explore the different types of climbing spurs, focusing on materials like steel and aluminum, and gaff lengths suited for tree, pole, or hybrid work. We discuss: How steel spurs offer durability ideal for beginners, while lighter options suit experienced climbers The importance of proper footwear, emphasizing s...
Apr 29, 2025ā¢10 minā¢Season 2025Ep. 150
In this Monday episode of Talking Trees , we explore the vital processes of osmosis and root function that underpin healthy tree growth and establishment. Understanding how roots interact with their environment is crucial for arborists and anyone managing young or mature trees. We discuss: How osmotic processes drive water uptake and nutrient transport in tree roots Research findings on the role of seaweed extract biostimulants in enhancing root development and physiology in woody seedlings The ...
Apr 28, 2025ā¢14 minā¢Season 2025Ep. 149
This is your weekly summary of the Talking Trees podcast! š± Monday 142 - Easter and Tree Traditions We explored the symbolic connections between Easter celebrations and trees, highlighting the Tree of Life, Slavic spring rituals, and the deep-rooted relationship between seasonal traditions and nature. š§ Tuesday 143 - Elyās London Plane ā Earth Day We celebrated Earth Day by focusing on the conservation efforts for the Great London Plane of Ely, a heritage tree preserved through expert arboricu...
Apr 27, 2025ā¢16 minā¢Season 2025Ep. 148
In this special Arbor Day episode of Talking Trees , we shine a light on the role of consulting arborists and the importance of the American Society of Consulting Arborists (ASCA) in shaping the arboricultural profession. We discuss: The differences between arborists, certified arborists, and consulting arborists, focusing on training, experience, and responsibilities What it means to be a Registered Consulting ArboristĀ® (RCA)āa designation earned through advanced education, peer review, and eth...
Apr 25, 2025ā¢12 minā¢Season 2025Ep. 146
In this special Earth Day episode of Talking Trees , we spotlight one of the UKās most iconic trees: the Great London Plane of Ely. Celebrated as the largest of its kind in the country, this remarkable specimen stands not only as a botanical giant, but also as a symbol of heritage, science, and community engagement. We discuss: The historic and cultural significance of the Ely London Plane, now recognized as a national heritage tree A cutting-edge morphophysiological assessment led by arboricult...
Apr 22, 2025ā¢10 minā¢Season 2025Ep. 143
In this Monday holiday episode of Talking Trees , we explore the rich symbolic and cultural connections between Easter celebrations and trees. From the ancient Tree of Life to Slavic rituals involving willow branches, this episode weaves together mythology, art, and seasonal tradition. We discuss: The Tree of Life as a universal symbol of regeneration, often associated with spring, rebirth, and the cycle of life in both pagan and sacred traditions Czech and Slovak Easter customs, such as the pla...
Apr 21, 2025ā¢14 minā¢Season 2025Ep. 142
This is your weekly summary of the Talking Trees podcast ā exploring everything from microbiomes to medicine. Here's what we uncovered this week: š± Monday 135 - Street Trees and Soil Microbiota We opened the week underground, exploring how microbial life in the rhizosphere supports urban street trees. Bacteria, fungi, and endophytes form biochemical alliances that boost tree health, immunity, and resilience. š§· Tuesday 136 - Groundie We celebrated the essential role of the ground worker in tree...
Apr 20, 2025ā¢10 minā¢Season 2025Ep. 141
In this Friday episode of Talking Trees , we celebrate the legacy and ongoing impact of the International Society of Arboriculture (ISA)āthe worldās 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 & Urban Forestry (AUF) The transition of AUF to open access in 2022, expanding its reach and influen...
Apr 18, 2025ā¢13 minā¢Season 2025Ep. 139
In this Friday episode of Talking Trees , we celebrate the remarkable career of Dr. Mark Johnston, a pioneer in urban forestry whose lifeās 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: Markās early life and how his passion for trees developed His academic and professional path across London, Wales, and N...
Apr 13, 2025ā¢20 minā¢Season 2025Ep. 132
This is your weekly summary of the Talking Trees podcast ā bringing you expert insights and practical knowledge from Monday to Saturday. Hereās what we covered this week: š± Monday 121 - Function of Assimilation Apparatus We explored the role of the assimilation apparatus ā leaves and needles ā in photosynthesis and stress adaptation. Learn how tree anatomy supports vitality, how morphology reflects pollution exposure, and why this matters when choosing trees for urban environments. š§· Tuesday 1...
Apr 06, 2025ā¢14 minā¢Season 2025Ep. 127
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 adaptation in the evolving field of arboriculture. Background information: David Lonsdale :: British ...
Apr 04, 2025ā¢20 minā¢Season 2025Ep. 125
This is your weekly summary of the Talking Trees podcast. Letās revisit the fascinating episodes we explored this week: š± Monday 114 - Pulleys and Friction Rings We kicked off the week with a look at the essential climbing gearāpulleys and friction rings. We discussed their functions, differences, and best use cases in tree work. š§ Tuesday 115 - Stockholm Soils On Tuesday, we explored the diverse soil conditions in Stockholm and how they impact urban tree health and management strategies. āļø W...
Mar 30, 2025ā¢11 minā¢Season 2025Ep. 120
