Adbian

Static Tree Pulling Test 🌳

The static tree pulling test is a diagnostic method used to assess the mechanical stability of a tree and to determine the probability of failure, either by stem breakage or root plate overturning. However, the method does not account for dynamic wind effect, such as gusts, changing wind direction, oscillations, and adaptive growth responses which cannot be fully replicated by static loading.

📖James, K.R. (2010) A dynamic structural analysis of trees subject to wind loading. Melbourne: University of Melbourne, Melbourne School of Land and Environments.
Machar, I. et al. (2022) Identifikace a hodnocení významných stromů. Olomouc: Univerzita Palackého. ISBN 978-80-244-6040-6.

🌳Urban Forestry Adaptation: From Passive Planting to Precision Management 💧

Integrating technologies extends tree lifespan by decades and maximizes their cooling potential. Investing in a "smart root zone" is now more economically viable than constantly replacing dead saplings.

These solutions help secure tree survival in the early stages of their life cycle. Adbian focuses on preserving mature and senescent trees — the ones we most want to keep.

🎄 What Christmas Tree Can Withstand the Season?

Each tree grows under different conditions, and its wood shows high individual variability. Even an otherwise healthy-looking tree may possess wood with mechanical traits that significantly reduce its load-bearing capacity.

Safety comes first, which is why today every candidate undergoes strict testing and structural analysis!

🍄 𝐖𝐡𝐞𝐧 𝐟𝐮𝐧𝐠𝐢 𝐫𝐞𝐬𝐡𝐚𝐩𝐞 𝐩𝐥𝐚𝐧𝐭 𝐦𝐞𝐜𝐡𝐚𝐧𝐢𝐜𝐬: 𝐦𝐢𝐜𝐫𝐨𝐭𝐮𝐛𝐮𝐥𝐞𝐬 𝐚𝐬 𝐞𝐚𝐫𝐥𝐲 𝐫𝐞𝐬𝐩𝐨𝐧𝐝𝐞𝐫𝐬

Fungi do not trigger only chemical defenses — their activity also alters the mechanical environment of plant tissues, which plants can detect through highly sensitive mechanosensing systems.

This mechanobiological pathway is well documented in the herbaceous stem of Arabidopsis, where fungal-induced changes in cell-wall tension reorganize cortical microtubules and activate immunity. Although this has not yet been demonstrated in the woody tissues of mature trees, the evolutionary conservation of mechanosensing, the known mechanical responsiveness of cambial and xylem tissues, and the presence of CMT-based stress perception in secondary growth all suggest that similar mechano-signaling processes may operate in trees as well — even if they remain experimentally unconfirmed in secondary xylem.

🪱 Living soils, not heavy machines 🚜

Urban trees help buffer the impacts of climate change by storing carbon, yet their resilience is often undermined by soil compaction from urban activity. Recent research is testing nature-based approaches—such as earthworms and nitrogen-fixing white clover—alongside established methods like vertical mulching and woodchip layers.

Perhaps the next step in urban forestry isn’t just about relieving compaction, but about building living soils that sustain themselves — integrating ecological processes into engineering models.

Visual narrowing 🌳

Trees near roads can pose collision risks, so careful design is essential, appropriate setback, species selection, and trunk protection. Despite this, the overall safety effect of trees is positive.

🌳 Trees create vertical edges that make the road feel narrower, prompting drivers to slow down.

🍃 Greenery calms drivers and reduces risk-taking.

🚗 Simulator studies show drivers shift lane position and behave more cautiously where trees are present.

🌳💧In every tree, water transport is a matter of balance between performance and safety. To move water efficiently from roots to leaves, trees rely on a hydraulic system that must remain both conductive and resilient.

The efficiency–safety principle applies to tree biomechanics as well. Adbian quantifies this balance through data, modeling, and spatial analysis, revealing the tree as an integrated system where vitality and stability are one.

📖 Source:
Tyree, M. T. & Zimmermann, M. H. (2002). Xylem Structure and the Ascent of Sap. Springer Series in Wood Science.

A huge thank you to ISA Texas for an incredible experience at the Waco conference last week! We were thrilled by the warm welcome and the opportunity to connect with so many passionate experts. Grateful for the new friendships forged and excited to reconnect next year. Next up: New Zealand!

Old trees are priceless for biodiversity, but what if nature doesn’t have enough time? Researchers tested veteranisation, the deliberate creation of wounds in younger oaks to mimic natural aging.

The goal: speed up the development of tree microhabitats.

Why it matters:

🪲 Supports saproxylic insects (species depending on decaying wood)
🦇 Provides roosts for bats and nesting spots for birds
🧬 Boosts biodiversity in forests, parks, and urban areas
🪜 Bridges the gap while ancient trees slowly disappear.

Veteranisation isn’t about harming trees, it’s about helping them host life and keeping ecosystems alive while future generations of giants grow.

📖 Cizek, L., Kozel, P., Hauck, D., Ambrožová, L., Helclová, M., Šebek, P., Panková, H., Skorpik, M. & Bengtsson, V., 2025. Artificial tree microhabitats: Wound depth and position affect saproxylic beetles attracted to freshly veteranised trees. Insect Conservation and Diversity. Available at: https://doi.org/10.1111/icad.12785

In the past two weeks, we had the pleasure of joining two fantastic conferences:

🌳Trees & Utilities in Knoxville, TN
🌳Trees and Technology in Decatur, GA

A huge thank you to both organizers for hosting us! It’s always inspiring (and a lot of fun) to explore how Adbian can bring more value to everyday tree work, whether you’re supporting utilities, cities, or residential clients.
We’re also grateful for all the great conversations, both with old friends and with so many new ones we were excited to meet!

Compartmentalization of Decay in Trees 🍄

Once this system is understood, it serves as a framework for recognizing a wide range of defects across many tree species.

The CODIT model is built on two key principles. First, trees are naturally highly compartmentalized organisms. Second, when a tree is wounded, it isolates and confines the resulting defects within specific compartments.

With Adbian, you can visualize and analyze tomograph or resistograph data, see where barriers hold and where decay has breached them, and link it directly to trunk stability assessment.