🔒 Allergenicity and Trees

Talking Trees

#Science #Environment #Arboricultural Academy #Podcasting Education #Arboriculture #Tree #Tree Limber

38:05

In late 1972, U.S. Marine Captain Ron Forrester disappeared on a bombing run into North Vietnam. Back home in Texas, his family could only wait and hope. Audio subscribers to Texas Monthly can get early access to episodes of the series, plus exclusive interviews and audio. Visit texasmonthly.com/audio to join. Go to HelloFresh.com/FLIGHT10FM to get 10 Free Meals with a Free Item For Life.…

9 days ago 10:18

MP3•Episode home

Subscriber-only episode

In this Saturday episode of Talking Trees, we explore how urban trees and green spaces contribute to pollen allergenicity, a growing health concern—especially as climate change alters pollen production patterns.

We discuss:

Findings from Florence and Córdoba showing how urban park design, plant species selection, and park size influence ground-level pollen concentrations
Research from Poland evaluating allergenicity in urban parks using plant volume and allergenicity indices
A new framework for creating regional guides on allergenic tree species, helping planners make better planting decisions
Insights from a systematic review showing that climate change is increasing the Annual Pollen Integral (APIn), exacerbating allergies across Europe and North America
Strategies for balancing biodiversity, urban greening, and public health, including allergen-aware urban forestry practices

This episode emphasizes the importance of species selection and climate-sensitive planning to create healthier, greener cities.

Background information:

Ciani et al. 2021. The effect of urban green areas on pollen concentrations at ground level_ a study in the city of Florence (Italy).pdf
De Weger et al. 2024. Method to develop a regional guide for the allergenic potential of tree pollen.pdf
Kasprzyk et al. 2018. Evaluation of the allergenicity of various types of urban parks in a warm temperate climate zone.pdf
Mousavi et al. 2024. Impacts of climate change on allergenic pollen production_ A systematic review and meta-analysis.pdf
Velasco-Jiménez et al. 2020. Allergenicity of the urban green areas in the city of Córdoba (Spain).pdf

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https://arboristickaakademie.cz

Podcast is created using AI tools.

Chapters

1. Introduction to Urban Pollen Research (00:00:00)

2. Florence Study: Moss Cushion Method (00:01:10)

3. IOZIA: Measuring Allergy Risk (00:02:00)

4. Climate Change Impact on Pollen (00:03:07)

5. Strategic Tree Selection for Cities (00:05:20)

6. Building Healthier Urban Ecosystems (00:07:35)

7. Key Takeaways and Conclusion (00:09:17)

159 episodes

🔒 Allergenicity and Trees

Talking Trees

published 9 days ago

MP3•Episode home

Subscriber-only episode

We discuss:

Findings from Florence and Córdoba showing how urban park design, plant species selection, and park size influence ground-level pollen concentrations
Research from Poland evaluating allergenicity in urban parks using plant volume and allergenicity indices
A new framework for creating regional guides on allergenic tree species, helping planners make better planting decisions
Insights from a systematic review showing that climate change is increasing the Annual Pollen Integral (APIn), exacerbating allergies across Europe and North America
Strategies for balancing biodiversity, urban greening, and public health, including allergen-aware urban forestry practices

This episode emphasizes the importance of species selection and climate-sensitive planning to create healthier, greener cities.

Background information:

Ciani et al. 2021. The effect of urban green areas on pollen concentrations at ground level_ a study in the city of Florence (Italy).pdf
De Weger et al. 2024. Method to develop a regional guide for the allergenic potential of tree pollen.pdf
Kasprzyk et al. 2018. Evaluation of the allergenicity of various types of urban parks in a warm temperate climate zone.pdf
Mousavi et al. 2024. Impacts of climate change on allergenic pollen production_ A systematic review and meta-analysis.pdf
Velasco-Jiménez et al. 2020. Allergenicity of the urban green areas in the city of Córdoba (Spain).pdf

Send us a text

Buzzsprout

free episodes without subscription
all episodes with subscription
https://talkingtrees.arboristika.cz/

HeroHero

all episodes with subscription
https://herohero.co/talkingtrees

Arboricultural academy

https://arboristickaakademie.cz

Podcast is created using AI tools.

Chapters

1. Introduction to Urban Pollen Research (00:00:00)

2. Florence Study: Moss Cushion Method (00:01:10)

3. IOZIA: Measuring Allergy Risk (00:02:00)

4. Climate Change Impact on Pollen (00:03:07)

5. Strategic Tree Selection for Cities (00:05:20)

6. Building Healthier Urban Ecosystems (00:07:35)

7. Key Takeaways and Conclusion (00:09:17)

159 episodes

#Science #Environment #Arboricultural Academy #Podcasting Education #Arboriculture #Tree #Tree Limber

All episodes

1
RECAP - CW 18/2025 10:50

20 hours ago10:50

10:50

This is your weekly summary of the Talking Trees podcast – diving deep into tree biology, gear, policy, soil, and society. Here’s what we explored this week: 🌱 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. 🧷 Tuesday 150 - Tree Climbing Spikes Tuesday’s episode focused on climbing spurs: their construction, proper use, and the serious damage they can cause to living trees. Learn when spikes are appropriate, how to use them safely, and why correct technique matters for both arborist and tree. ✂️ Wednesday 151 - Common Sense Risk Management of Trees We explored the second edition of the UK’s tree safety guidelines. Emphasizing proportionate, informed tree management, this episode highlighted the importance of balancing public safety with tree preservation and legal responsibility. 📋 Thursday 152 - Phytophthora We dove into the global spread of Phytophthora, a genus of destructive pathogens threatening forest ecosystems. Learn how early detection, hygiene practices, and awareness are key to managing this persistent threat. ✨ Friday 153 - Soil Microbiome and Trees This episode spotlighted the soil microbiome's pivotal role in nutrient cycling, disease resistance, and climate resilience. We discussed how soil health connects plant, animal, and human systems within the One Health framework. 🐝 Saturday 154 - Social Study Protect Biodiversity We ended the week with a human perspective on biodiversity. A study from Spain showed strong public support for conservation, and we reflected on how arboriculture contributes to community resilience and ecological awareness. Every episode this week connected the living systems beneath, within, and around trees – including the people who care for them. Keep tuning in to Talking Trees and grow with us. Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
Social Study Protect Biodiversity 13:04

2 days ago13:04

13:04

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 development or private property rights, in favor of biodiversity goals The importance of social engagement, education, and communication in bridging the gap between policy, management, and the public Reflections on how arboriculture contributes not only to ecological outcomes but to mental well-being, civic identity, and community resilience The growing recognition that protecting biodiversity is not only a biological challenge but a social and cultural commitment Biodiversity protection begins not just in the forest, but in the hearts and minds of people—our choices, values, and actions matter. Background information: Algarra et al. 2024. Is the Spanish Population Pro-Conservation or Pro-Utilitarian towards Threatened Flora_ Social Analysis on the Willingness to Protect Biodiversity.pdf Kuo. 2003. The role of arboriculture in a healthy social ecology.pdf Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
Soil Microbiom and Trees 14:37

3 days ago14:37

14:37

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 framework—linking plant, animal, and human well-being The evolving understanding of soil as a multifunctional ecosystem service, not merely a medium for productivity Why soil health assessment should integrate biological, chemical, and physical indicators to reflect its true vitality The dual role of soil microbes as both beneficial allies and potential sources of pathogens, highlighting the need for careful balance Healthy soils mean healthy trees—and understanding this hidden world is key to building sustainable, resilient landscapes in the face of climate and biodiversity challenges. Background information: Banerjee et van der Heijden. 2022. Soil microbiomes and one health.pdf Lehmann et al. 2020. The concept and future prospects of soil health.pdf Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
Phytopthora 13:25

4 days ago13:25

13:25

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 across woodlands and heritage landscapes Broader examples such as Phytophthora cinnamomi, responsible for widespread root rot in forest trees across Australia and the Americas Common symptoms of infection: crown thinning, bleeding cankers, dieback, and root decay The importance of early detection, biosecurity measures, and public awareness to limit spread and protect vulnerable ecosystems Phytophthora continues to reshape forest health policy and underscores the need for vigilant, science-informed tree management. Background information: Drake et Jones. 2017. Public value at risk from Phytophthora ramorum and Phytophthora kernoviae spread in England and Wale.pdf Hardy. 2004. Phytophthora Root Rot of Forest Trees.pdf Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
Common Sense Risk Management of Trees 16:10

5 days ago16:10

16:10

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 Occupiers’ Liability Acts and the Health and Safety at Work Act Different levels of tree risk assessment, from informal checks and drive-by assessments to formal inspections based on public access and context How the second edition of the guidance encourages retention of trees rather than unnecessary removals The promotion of a balanced, reasonable, and practical culture of tree safety among landowners, managers, and arborists Trees are vital assets, and this updated guidance helps ensure they are protected and managed wisely, without excessive fear or overreaction. Background information: Common sense risk management of trees, Guidance on trees and public safety in the UK for owners, managers and advisers, NATIONAL TREE SAFETY GROUP, © Crown copyright 2024 article from the Arboricultural Association - launch of the second edition of Common Sense Risk Management of Trees by the National Tree Safety Group (NTSG). Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
Tree Climbing Spikes 10:23

6 days ago10:23

10:23

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 stiff soles and strong heels to prevent slippage The significant damage spurs can cause to living trees by puncturing the cambium, highlighting why their use should be limited to removals or emergencies Techniques and safety measures to avoid "gaffing out"—losing grip with the spurs—and the critical role of correct climbing form When and how to responsibly incorporate spikes into tree climbing practices while protecting tree health Understanding the right time and method for using spurs is key to maintaining both safety and professional integrity in tree work. Background information: EVERYTHING You Need To Know About Tree Climbing Spurs! A Complete Guide to Choosing and Using Spurs! Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
Osmosis and Root Function 14:21

7 days ago14:21

14:21

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 influence of soil structure complexity, including the presence of macropores and heterogeneous conditions, on root penetration and growth Why both biological treatments and physical soil conditions are key to fostering strong, resilient root systems Practical insights for improving tree establishment and long-term vigor through better understanding of root function Roots do much more than anchor trees—they are dynamic systems adapting to their environment, driving the success of the entire organism. Background information: Comin et al. 2024. Growth, Physiology, and Root Development in Seedlings of Woody Species Treated with a Seaweed Extract.pdf Giuliani et al. 2024. Effects of soil structure complexity to root growth of plants with contrasting root architecture.pdf TREE BIOLOGY, Tree Warden Learning Guides, Module 2 Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
RECAP - CW 17/2025 15:35

8 days ago15:35

15:35

This is your weekly summary of the Talking Trees podcast! 🌱 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. 🧗 Tuesday 143 - Ely’s London Plane – 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 arboricultural practices and community collaboration. ✂️ Wednesday 144 - Severe Pruning and Ecoservices We examined how severe pruning impacts urban trees’ ability to regulate microclimates and provide ecosystem services, emphasizing the benefits of moderate, frequent pruning for long-term tree health. 📋 Thursday 145 - Fire, Humans and Trees This episode reflected on humanity's ancient relationship with fire, its role in shaping both human evolution and our interactions with trees, from forest management to environmental impacts. ✨ Friday 146 - ASCA – Arbor Day On Arbor Day, we highlighted the American Society of Consulting Arborists (ASCA) and the crucial role consulting arborists play in preserving trees through science-based assessments and professional guidance. 🐝 Saturday 147 - Allergenicity and Trees We explored how urban trees contribute to airborne pollen levels, the effects of climate change on allergenic pollen production, and strategies for allergen-aware urban greening. Keep listening and growing with Talking Trees! Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
🔒 Allergenicity and Trees 10:18

9 days ago10:18

10:18

Subscriber-only episode In this Saturday episode of Talking Trees , we explore how urban trees and green spaces contribute to pollen allergenicity, a growing health concern—especially as climate change alters pollen production patterns. We discuss: Findings from Florence and Córdoba showing how urban park design, plant species selection, and park size influence ground-level pollen concentrations Research from Poland evaluating allergenicity in urban parks using plant volume and allergenicity indices A new framework for creating regional guides on allergenic tree species, helping planners make better planting decisions Insights from a systematic review showing that climate change is increasing the Annual Pollen Integral (APIn), exacerbating allergies across Europe and North America Strategies for balancing biodiversity, urban greening, and public health, including allergen-aware urban forestry practices This episode emphasizes the importance of species selection and climate-sensitive planning to create healthier, greener cities. Background information: Ciani et al. 2021. The effect of urban green areas on pollen concentrations at ground level_ a study in the city of Florence (Italy).pdf De Weger et al. 2024. Method to develop a regional guide for the allergenic potential of tree pollen.pdf Kasprzyk et al. 2018. Evaluation of the allergenicity of various types of urban parks in a warm temperate climate zone.pdf Mousavi et al. 2024. Impacts of climate change on allergenic pollen production_ A systematic review and meta-analysis.pdf Velasco-Jiménez et al. 2020. Allergenicity of the urban green areas in the city of Córdoba (Spain).pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
ASCA - Arbor Day 11:34

10 days ago11:34

11:34

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 Arborist® (RCA)—a designation earned through advanced education, peer review, and ethical standards ASCA’s mission to support education, communication, and excellence in tree consulting How consulting arborists provide objective, science-based assessments critical to tree preservation, urban planning, and risk management The significance of Arbor Day as a celebration of trees and the professionals who protect them This episode honours the technical expertise and advisory role of consulting arborists—and the trees they help save every day. Background information: American Society of Consulting Arborists What are the differences between an arborist, a certified arborist, a consulting arborist, and a Registered Consulting Arborist® (RCA)? | LandArbor Consulting, LLC Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
🔒 Fire, Humans and Trees 15:19

11 days ago15:19

15:19

Subscriber-only episode In this Thursday episode of Talking Trees , we take a long-view perspective on one of humanity’s most transformative relationships: the discovery and use of fire, and its complex connection with trees and the natural world. We discuss: How early hominins first encountered natural wildfires and slowly began to control and harness fire The role of wood as fuel, and how fire shifted the dynamic between humans and trees—from forest dwellers to landscape shapers The evolutionary implications of fire use, including the cooking hypothesis and its role in human brain development The cultural and ecological legacy of fire—both as a tool for survival and a driver of deforestation and forest management Why fire remains a double-edged force in arboriculture and landscape ecology today From ancient hearths to controlled burns, this episode traces how fire not only changed humans, but also reshaped our relationship with trees. Background information: The discovery of fire by humans: a long and convoluted process | Philosophical Transactions of the Royal Society B: Biological Sciences.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
🔒 Severe Pruning and Ecoservices 12:13

12 days ago12:13

12:13

Subscriber-only episode In this Wednesday episode of Talking Trees , we take a critical look at how severe pruning—especially topping—affects urban trees and their ability to provide ecosystem services. Drawing from the latest scientific research, we explore how pruning practices shape tree physiology, carbon capture, and microclimate regulation. We discuss: Findings from Comin et al. (2024), showing that topping significantly reduces a tree's capacity for cooling and carbon assimilation, despite some short-term physiological responses Insights from Muscas et al. (2024), revealing that frequent, moderate pruning can better maintain trees’ long-term ability to sequester carbon and capture particulate matter (PM10) How pruning waste management plays a role in the overall carbon balance of urban forestry The tension between visual/aesthetic goals and functional performance in tree management Why evidence-based pruning strategies are essential for sustaining the ecosystem services trees provide in cities This episode urges arborists and municipalities to rethink the long-term impact of pruning practices on urban climate and air quality. Background information: Comin et al. 2024. Effects of severe pruning on the microclimate amelioration capacity and on the physiology of two urban tree species.pdf Muscas et al. 2024. Effects of urban tree pruning on ecosystem services performance.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
Ely`s London Plane - Earth Day 9:58

13 days ago9:58

9:58

In this special Earth Day episode of Talking Trees , we spotlight one of the UK’s 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 arboricultural experts to evaluate the tree’s health and structure Conservation strategies including precision pruning, new cable bracing, and real-time monitoring systems A collaborative effort by organizations such as the Tree Council, Woodland Trust, and University of Cambridge Broader reflections on the role of Earth Day in promoting tree awareness and conservation at both local and global levels The Ely Plane reminds us that caring for individual trees can be a powerful act of ecological stewardship and cultural preservation. Background information: article from the Arboricultural Association's ARB Magazine focuses on the conservation efforts for the Great London Plane Tree of Ely Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
Easter and Tree Traditions 14:12

14 days ago14:12

14:12

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 playful whipping with willow rods (pomlázka), rooted in fertility rites and seasonal renewal The pagan origins of Easter symbols like eggs, hares, and decorated trees, representing growth, magic, and connection to the earth How ancient and modern art continue to use trees as a central motif in celebrations of life and transformation Reflections on how trees connect us to cyclical time, seasonal transitions, and collective memory This episode invites us to look beyond chocolate eggs and into the arboricultural echoes of Easter. Background information: Art and The Ancient Secrets of the Tree of Life The Czech Easter tradition of whipping girls | Radio Prague International The Pagan Roots of Easter — School of the Sacred Wild • Marysia Miernowska Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

1
🔒 RECAP - CW 15/2025 15:41

14 days ago15:41

15:41

Subscriber-only episode This is your weekly summary of the Talking Trees podcast – bringing you a full week of arboricultural knowledge, inspiration, and science. 🌱 Monday 128 - Tree Interactions with Other Organisms We began the week exploring how trees coexist with fungi, animals, and microbes. Learn how mycorrhizal networks, competition, and symbiosis shape forest resilience and biodiversity in both natural and urban settings. 🧷 Tuesday 129 - Structural Substrates This episode took a deep dive into engineered soil systems like CU-Structural Soil®, offering practical solutions to soil compaction in urban environments. Discover how to support root growth beneath pavement without sacrificing infrastructure stability. ✂️ Wednesday 130 - Tree Injections We discussed vegetative endotherapy, a targeted method of delivering treatments directly into a tree’s vascular system. Explore the tools, applications, and best practices for pest, disease, and nutrient management. 📋 Thursday 131 - Who Should Pay to Protect Trees We tackled the complex intersection of urban tree ordinances, legal frameworks, and environmental ethics. The Canton Township case revealed the challenges of enforcing tree protection policies. ✨ Friday 132 - Mark Johnston - Lifelong Arborist A tribute to the impactful career of Dr. Mark Johnston, urban forestry leader and educator. From the UK to global influence, his work has helped shape arboriculture policy, education, and public engagement. 🐝 Saturday 133 - Chalara fraxinea We ended the week with a sobering look at ash dieback. Learn how Chalara fraxinea, the emerald ash borer, and other stressors are decimating Fraxinus excelsior populations, and what science offers in response. From fungal pathogens to engineered soils and tree protection law, this week brought a dynamic mix of knowledge. Stay curious and rooted – only on Talking Trees. Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

Talking Trees

1
RECAP - CW 16/2025 10:25

15 days ago10:25

10:25

This is your weekly summary of the Talking Trees podcast – exploring everything from microbiomes to medicine. Here's what we uncovered this week: 🌱 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. 🧷 Tuesday 136 - Groundie We celebrated the essential role of the ground worker in tree care. Groundies are the backbone of every crew, providing safety, support, and coordination on the ground. Inspired by Jeff Jepson's book, this episode is a tribute to skill and teamwork. ✂️ Wednesday 137 - Lightning and Trees Midweek struck with energy as we examined lightning's impact on trees. From decay to habitat creation, we discussed how lightning shapes ecosystems and when arborists should install protection systems for vulnerable trees. 📋 Thursday 138 - Trees and Cancer Could trees help prevent cancer? We explored emerging research linking green spaces to reduced cancer risk, including lower breast cancer rates in urban areas. Though evidence is still evolving, the episode makes a strong case for trees in public health. ✨ Friday 139 - International Society of Arboriculture = ISA We highlighted ISA's century of dedication to tree care. From launching Arboriculture & Urban Forestry to advancing certification and research, ISA continues to lead global arboriculture into the future. 🐝 Saturday 140 - Trees Pharmacological We closed the week by stepping into the world of medicinal trees. Discover how ash and white willow produce compounds with anti-inflammatory, antimicrobial, and antioxidant effects – and how sustainable use could shape future medicine. From microbes to medicine, this week showed how trees touch every layer of life. Keep listening and growing with Talking Trees. Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

Talking Trees

1
🔒 Trees Pharmacological 11:30

16 days ago11:30

11:30

Subscriber-only episode In this Saturday episode of Talking Trees , we explore the pharmacological potential of trees, focusing on two iconic species: Fraxinus (ash tree) and Salix alba (white willow). Both have long histories in traditional medicine and are now gaining attention in modern pharmacological research. We discuss: The presence of powerful compounds in ash trees such as secoiridoids, flavonoids, and lignans, with demonstrated anti-inflammatory, antioxidant, anticancer, antimicrobial, and neuroprotective effects The pharmacological profile of white willow, especially its salicin-rich bark, and its applications as a natural source of salicylic acid derivatives Scientific studies quantifying phenolic compounds across different parts of these trees—including bark, leaves, and branches The role of tree-based compounds in future drug discovery and the growing interest in plant-derived therapeutics The importance of sustainable sourcing and continued research into these underexplored biological treasures Trees are more than landscape features—they are living pharmacies with immense potential for human health. Background information: Fraxinus_A_Plant_with_Versatile_Pharmacological_an.pdf Neagu_AndreeaMiruna_art.1.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

Talking Trees

1
International Society of Arboriculture = ISA 13:07

17 days ago13:07

13:07

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 & Urban Forestry (AUF) The transition of AUF to open access in 2022, expanding its reach and influence in global tree care and research ISA’s core mission: promoting education, certification, research, and professional development in arboriculture The journal’s role in supporting urban forestry as cities increasingly invest in green infrastructure As the field of arboriculture grows in importance, ISA continues to serve as a pillar of knowledge and community, connecting practitioners and researchers worldwide. Background information: Celebrating 50 Years of Arboriculture & Urban Forestry:Journal of Arboriculture | Arboriculture & Urban Forestry.pdf International Society of Arboriculture > Who We Are Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

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🔒 Trees and Cancer 15:47

18 days ago15:47

15:47

Subscriber-only episode In this Thursday episode of Talking Trees , we explore the emerging and complex connections between exposure to trees and green spaces and the risk of cancer, particularly breast cancer. While research is still developing, recent studies have started to uncover possible protective effects of urban greenery on human health. We discuss: A multi-regional study from Spain suggesting lower breast cancer risk among women living near urban green spaces, compared to higher risk near agricultural areas A systematic review analyzing global data, revealing inconsistent but potentially protective links between greenspace exposure and various cancer outcomes The challenges of isolating environmental vs. lifestyle factors in cancer risk assessments Why tree-filled environments might contribute to stress reduction, better air quality, and increased physical activity, all of which may influence long-term health outcomes The importance of urban tree planning not only for ecology but for public health strategies This episode highlights how trees may play a subtle but meaningful role in supporting human health—and how more research is needed to fully understand their therapeutic potential. Background information: O’Callaghan-Gordo et al. 2018. Residential proximity to green spaces and breast cancer risk_ The multicase-control study in Spain (MCC-Spain).pdf Sakhvidi et al. 2022. Exposure to greenspace and cancer incidence, prevalence, and mortality_ A systematic review and meta-analyses.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

Talking Trees

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🔒 Lightning and Trees 14:49

19 days ago14:49

14:49

Subscriber-only episode In this Wednesday episode of Talking Trees , we investigate the powerful and often underestimated role of lightning in the life and death of trees. Lightning not only causes physical damage but may also shape tree evolution and biodiversity over time. We explore: How lightning strikes affect tree aging, decay processes, and habitat creation The ecological significance of lightning-damaged trees as microhabitats for biodiversity Current technical standards for lightning protection, including components, installation procedures, and long-term maintenance When and why to install lightning protection systems in high-value or ecologically important trees Insights from arboricultural and engineering practices that help reduce tree loss due to strikes Lightning is not just a destructive force—it’s a natural phenomenon deeply intertwined with forest dynamics and arboricultural care. Background information: 2003 - The possible role of lightning in the tree evolution and biodiversity - Fay.pdf KnŪöka 2.1 Final.pdf SPPK A02 006_2015Ochrana_Blesk_FINAL_AOPK.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

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🔒 Groundie 13:32

20 days ago13:32

13:32

Subscriber-only episode In this Tuesday episode of Talking Trees , we focus on the often underappreciated but absolutely essential role of the Groundie—the ground worker in tree care operations. Inspired by Jeff Jepson’s book Groundie , we explore what it takes to thrive in this demanding position. We discuss: The core responsibilities of a ground worker during tree work operations Why the job is both physically intense and mentally engaging The reality of high turnover versus the deep satisfaction for those who commit to the craft How the role of a groundie provides the foundation for climbing arborists and safe, efficient teamwork Why Jepson’s book is a valuable introduction for those entering the field of arboriculture This episode celebrates the Groundie not as a stepping stone, but as a profession in its own right, rich in skills, pride, and purpose. Background information: Excerpt from “Groundie” by Jeff Jepson: The Role of the Ground Worker….At a Glance. - Sherrilltree Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

Talking Trees

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🔒 Street Trees and Soil Microbiota 14:59

21 days ago14:59

14:59

Subscriber-only episode In this Monday episode of Talking Trees , we uncover the hidden world beneath our feet—the soil microbiota that supports and sustains urban street trees. This episode dives into the crucial roles played by bacteria, fungi, and other micro organisms living in the rhizosphere and within tree tissues. We discuss: How microbial communities affect tree nutrition, immunity, and resilience The constant biochemical communication between roots and microbes The importance of endophytes and rhizospheric organisms in supporting tree health Why moving beyond an anthropocentric perspective helps us appreciate the complexity of urban tree ecosystems How this knowledge can inform better urban tree care and soil management strategies Street trees are not isolated individuals but hubs in a vibrant, living underground network. Recognizing their microbial allies is key to sustaining greener, healthier cities. Background information: SUELO, ÁRBOL URBANO Y VECINOS INVISIBLES.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

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Mark Johnston - Lifelong Arborist 19:55

22 days ago19:55

19:55

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 and how his passion for trees developed His academic and professional path across London, Wales, and Northern Ireland Key projects and collaborations that influenced urban forestry policy and education The intersection of social values, politics, and green infrastructure Insights on how urban forestry has evolved—and where it’s going next Listeners will be inspired by Mark’s commitment to trees, communities, and sustainable cities. Background information: Planting Ideas in the Urban Forest (https://markjohnstontrees.com/free-ebook/) https://markjohnstontrees.com Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

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🔒 Chalara fraxinea 14:33

23 days ago14:33

14:33

Subscriber-only episode Episode Summary (English): In this Saturday episode of Talking Trees , we examine the devastating impact of Chalara fraxinea ( Hymenoscyphus fraxineus ), the fungal pathogen behind ash dieback in Europe. We explore the spread, symptoms, and susceptibility factors affecting Fraxinus excelsior and other ash species, including findings from Ukraine, Poland, and Lithuania. We discuss: How the ash dieback pathogen and emerald ash borer are compounding damage in Eastern Europe The potential role of bud burst timing in ash resistance, with earlier-bursting clones showing greater survival The presence of wood-inhabiting fungi , like Armillaria cepistipes , in weakened trees, and their possible role in secondary decline The importance of phenological and genetic traits in breeding programs for resilient ash populations This episode highlights current scientific insights into ash decline and disease ecology , offering a hopeful look at strategies for future forest resilience. Background information: Davydenko et al. 2022. Invasion of Emerald Ash Borer Agrilus planipennis and Ash Dieback Pathogen Hymenoscyphus fraxineus in Ukraine - A Concerted Action.pdf Przybylski et al. 2024. Spring's Signal_ Can Bud Burst Timing Enhance Resistance to Ash Dieback in Europe_.pdf Wood-inhabiting_fungi_in_stems_of_Fraxin.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

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🔒 Who Should Pay to Protect Trees 13:58

25 days ago13:58

13:58

Subscriber-only episode In this Thursday episode of Talking Trees , we examine one of the most contentious questions in urban arboriculture: who should bear the cost of protecting trees? Focusing on legal and planning frameworks in the United States, the episode explores how local tree protection ordinances can spark conflict between environmental goals and private property rights. We discuss: The concept of regulatory takings and its legal implications for tree protection The case of Canton Township and its failed legal defence of mitigation fees The risks of poorly designed or overly rigid tree ordinances How municipalities can create more balanced, defensible policies that benefit both the public and property owners Ethical considerations in distributing the responsibilities and costs of environmental stewardship This episode offers a thought-provoking look at the intersection of law, urban planning, and tree protection policy. Background information: Who Should Pay to Protect Trees Tree Protection Regulatory Takings and Unconstitutional Conditions.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

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🔒 Tree Injections 17:08

26 days ago17:08

17:08

Subscriber-only episode In this Wednesday episode of Talking Trees , we dig into the science and practice of tree injections, also known as vegetative endotherapy. This method of delivering substances directly into a tree's vascular system is transforming plant care, especially in managing pests and diseases. We explore: The history and development of endotherapy techniques Types of injection systems: trunk opening, interface, and direct injection The most common uses: applying insecticides, fungicides, and nutrients Practical considerations such as dosage, tree species suitability, and seasonal timing Benefits and limitations of injections compared to foliar sprays and soil treatments With insights from recent research, this episode highlights how tree injections are emerging as a sustainable, targeted approach in arboriculture and urban forestry. Background information: The endotherapy | Endoterapia Vegetal Tree Injection - an overview | ScienceDirect Topics.pdf Tree injection - Wikipedia Why Tree Injection? - Tree Care Industry Magazine agriculture-13-01465-v2.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

Talking Trees

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🔒 Structural Substrates 26:40

27 days ago26:40

26:40

Subscriber-only episode In this Tuesday episode of Talking Trees , we ascend into the practical world of structural substrates and their critical role in supporting healthy urban trees, especially in areas with paved surfaces and compacted soils. We focus on Cornell University’s CU-Structural Soil® system, an engineered soil blend combining crushed stone and uncompacted soil to provide a load-bearing yet root-friendly environment. This innovation allows trees to thrive beneath sidewalks, plazas, and roads without compromising infrastructure stability. Topics include: Challenges of urban soil compaction Benefits and function of structural substrates Key features of CU-Structural Soil® and its practical applications Installation, irrigation, and tree species considerations Examples from real-life urban projects This episode is a must for arborists, urban planners, and landscape architects looking to enhance tree health in dense city environments. Background information: Guía Suelos Estructurales Universidad de Cornel.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

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🔒 Tree Interactions with Other Organisms 12:53

28 days ago12:53

12:53

Subscriber-only episode In this Monday episode of Talking Trees , we dive into the intricate world of how trees interact with a wide range of other organisms—from fungi, lichens, and microbes to insects, birds, and mammals. These relationships are fundamental to ecosystem balance, biodiversity support, and forest resilience. Drawing from recent research, including findings from ScienceDirect, we highlight how trees interact with each other and other life forms both positively (facilitation) and negatively (competition). Key mechanisms like resource sharing, dilution of pests, and biotic feedbacks are explained, along with the importance of species diversity and mixed-species forests. The episode also explores practical implications for forest design and urban tree planning. Listeners will gain insight into: Mycorrhizal symbiosis and microbial communication Tree–tree interactions and resource partitioning The role of trees in providing habitats and food sources Real-world experiments such as BEF-China that measure ecological complexity These interconnected systems show how trees are not isolated organisms, but dynamic participants in evolving ecosystems. Background information: Plant Interactions with Other Organisms.pdf Plant interactions with other organisms: molecules, ecology and evolution.pdf Plant–animal interaction - Wikipedia The significance of tree-tree interactions for forest ecosystem functioning - ScienceDirect.pdf Send us a text Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

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RECAP - CW 14/2025 14:14

29 days ago14:14

14:14

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 reflects pollution exposure, and why this matters when choosing trees for urban environments. 🧷 Tuesday 122 - Soil Decompaction This episode tackled compacted urban soils and how they hinder tree health. We reviewed air spading, vertical mulching, and the use of biochar or compost to restore root zones and improve soil structure. ✂️ Wednesday 123 - Practical Pollarding Pollarding returns to the spotlight! We discussed how this traditional technique supports sustainable urban forestry, the difference between pollarding and topping, and how to handle neglected trees. 📋 Thursday 124 - Tree Value Calculation We examined how arborists and municipalities calculate the economic, social, and ecological value of trees. The episode broke down methods like Replacement Cost and Amenity Valuation. ✨ Friday 125 - David Lonsdale A tribute to David Lonsdale, a cornerstone in arboriculture. We revisited his work on tree pathology, risk assessment, and decay, and celebrated his lifelong contribution to arboricultural knowledge. 🐝 Saturday 126 - Erwinia amylovora We wrapped up the week with fire blight: the bacterial disease Erwinia amylovora. Learn how it affects apple and pear trees, how to identify symptoms, and strategies for managing and preventing outbreaks. Don’t miss a single episode of Talking Trees – your daily source of arboricultural inspiration and expertise. Send us a text Support the show Buzzsprout free episodes without subscription all episodes with subscription https://talkingtrees.arboristika.cz/ HeroHero all episodes with subscription https://herohero.co/talkingtrees Arboricultural academy https://arboristickaakademie.cz Podcast is created using AI tools.…

Talking Trees

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🔒 Erwinia amylovora 17:08

30 days ago17:08