Spotted Gum Tree Lightning Strike in Adamstown Heights

Exploring the Effects of Lightning Strikes on Trees

About six months ago, a striking incident took place when lightning struck a magnificent Spotted Gum (Corymbia maculata) situated in Adamstown Heights. In the immediate aftermath, the concerned customer reached out to Waratah Professional Tree Care for assistance. Our expert senior arborist, Steve, promptly arrived on site to carry out a comprehensive assessment of the damage inflicted. He executed a remedial pruning procedure aimed at boosting the tree’s likelihood of recovery. The visible entry and exit wounds from the lightning strike were starkly apparent, while a nearby tree suffered catastrophic damage, completely losing its foliage due to the overwhelming force of the lightning bolt.

The customer expressed concern over a noticeable decline in the health of the tree, leading to a request for Steve to return and evaluate the tree's potential for recovery after this distressing incident. This ongoing issue underscores the critical need for professional evaluations to manage tree health following such traumatic events.

What Are the Effects of Lightning Strikes on Trees?

The charred electrical patterns, referred to as Lichtenberg figures, were prominently displayed on the bark of the trunk, clearly outlining the path taken by the lightning. Both the entry wound, where the lightning made contact, and the exit wound, where it earthed, were unmistakable, indicating the severity of the incident.

Lightning does not merely burn the outer bark of a tree; the internal destruction it causes can be much more extensive and profound, significantly affecting the tree's overall health and structural stability.

When a bolt of lightning strikes a tree, the immense electrical charge travels through the tree, seeking the path of least resistance to the ground, typically through the water-conducting tissue located just beneath the bark. The heat generated is both extreme and instantaneous, effectively boiling the sap within the cambium layer, which is the thin band of living cells essential for the tree's growth and for transporting vital nutrients and water throughout the tree.

Once the cambium layer is compromised, the tree loses its ability to transport sugars from the leaves down to the roots and water from the roots to the leafy canopy. The affected cells perish, growth ceases, and overall vitality diminishes, critically undermining the structural integrity of the tree.

The tree does not perish immediately following the strike, which is why the decline may take weeks or even months to become visibly apparent. The particular Spotted Gum exhibits some regrowth, suggesting that it continues to fight for survival. However, the overall prognosis remains uncertain and cautious, highlighting the necessity for ongoing monitoring and care.

What Are the Prospects for Recovery of This Tree?

The degree of damage the tree sustained significantly depends on how much of the cambium layer was destroyed and whether the root system also suffered from the earthing strike. Understanding these factors is essential for determining the tree's future potential.

Steve’s assessment identified several urgent priorities that must be addressed:

• Implementing immediate safety measures: It is crucial to monitor the structural integrity of the tree. A tree that has been struck by lightning may appear stable while being severely weakened internally. Any significant deadwood present in the canopy poses a falling hazard and requires prompt intervention to ensure safety.
• Watching for secondary infections: The wounds created by a lightning strike can act as entry points for fungal diseases and wood-boring insects. A compromised tree is a vulnerable tree that necessitates vigilant observation and care to prevent further damage.
• Conducting regular evaluations: The degree of regrowth observed in the following months will offer valuable insights into the tree’s long-term prognosis. If the regrowth is vigorous and sustained, there is hope for recovery. Conversely, if it stagnates, removal may ultimately be the safest option to mitigate further risk to surrounding structures and individuals.

Should You Be Concerned About Lightning Strikes Affecting Your Trees?

While lightning strikes are relatively uncommon, they are not as infrequent as many may believe. Tall, isolated trees and those situated near water are statistically at a higher risk of being struck. Spotted Gums, like many eucalyptus species, are particularly conductive due to their moisture content and height, making them more prone to lightning strikes.

If you observe a sudden or unexplained decline in a tree, especially following a storm, it is advisable to have an arborist evaluate it at the earliest opportunity. Early intervention provides the tree with the best chance for recovery and protects you from the dangers associated with a compromised tree that remains undetected, ensuring safety for your property and the wider environment.

In-Depth Analysis of the Case Study

This assessment was conducted by Steve Brown, senior arborist at Waratah Professional Tree Care. Waratah has been delivering arborist services across Newcastle and the Hunter Region since 1998. We proudly hold ISO 9001, ISO 14001, and ISO 45001 certifications through Global Compliance Certification, reflecting our commitment to quality and environmentally responsible practices.

Frequently Asked Questions Regarding Lightning Strikes on Trees

Can a tree recover after being struck by lightning?
Yes, certain trees can recover from lightning strikes, particularly if the impact was a glancing blow and the damage to the cambium is confined to one side of the trunk. The potential for recovery depends on the species, the tree's overall health prior to the strike, and the extent of damage to the conducting tissue. An evaluation by an arborist is vital for determining the prognosis and necessary interventions.

How can I identify if my tree has been struck by lightning?
Look for indicators such as bark that has been blown off or scorched in a spiral or vertical pattern down the trunk, entry and exit wounds, sudden dieback of the canopy in the weeks following a storm, and occasionally, split wood or shattered branches. The presence of Lichtenberg figure burn patterns on the bark is a definitive sign of lightning damage.

Is a tree that has been struck by lightning dangerous?
Yes, it can be. A tree that has experienced significant internal damage from a lightning strike may fail structurally without displaying obvious external signs of distress. If you suspect lightning damage, it is crucial to have the tree assessed by a qualified arborist without delay to ensure the safety of people and property.

What steps should I take if I suspect my tree has been struck by lightning?
Ensure that people and pets are kept away from the affected tree until it has been evaluated. Reach out to a qualified arborist as soon as possible for a professional assessment. Avoid attempting to assess the structural damage yourself, as internal damage may not always be visible from the outside, and professional expertise is essential in these situations.

If you have a tree that you are worried about following storm damage or a lightning strike, Waratah Professional Tree Care offers onsite assessments across Newcastle and the Hunter Region starting from $110.
Contact us at (02) 4956 6602 for expert assistance.