Spotted Gum Tree Hit by Lightning in Adamstown Heights

Exploring the Effects of Lightning Strikes on Trees

Approximately six months ago, an astonishing incident transpired when lightning struck a magnificent Spotted Gum (Corymbia maculata) situated in Adamstown Heights. Following this dramatic event, the concerned customer promptly reached out to Waratah Professional Tree Care. Our expert senior arborist, Steve, swiftly arrived at the scene to carry out a comprehensive evaluation of the damage. He executed a remedial prune aimed at enhancing the tree’s chances of survival and recovery. The entry and exit wounds created by the lightning were clearly visible, while a nearby tree suffered catastrophic damage, losing all its foliage due to the sheer force of the lightning strike.

After the event, the customer observed a significant decline in the health of the tree, prompting a request for Steve to return and re-evaluate the tree's prospects for recovery. This ongoing concern underscores the critical importance of professional assessment in managing tree health following such traumatic incidents.

What Are the Effects of Lightning Strikes on Trees?

The charred electrical patterns, known as Lichtenberg figures, were prominently visible on the bark of the trunk, clearly delineating the path of the lightning. Both the entry wound, where the lightning struck, and the exit wound, where it earthed, were unmistakably marked, indicating the seriousness of the incident.

Lightning does not merely singe the outer bark of a tree; the internal damage it inflicts can be significantly more severe and widespread, impacting the tree's overall health and structural integrity. The immediate aftermath of a lightning strike often masks the deeper issues that arise within the tree.

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, generally through the water-conducting tissue located just beneath the bark. The heat produced is both extreme and instantaneous, effectively boiling the sap within the cambium layer, which is the thin band of living cells responsible for the tree's growth and the transport of essential 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 long-term prognosis for recovery becomes increasingly uncertain.

The tree does not die immediately following the strike, which is why the decline may take weeks or even months to become visibly apparent. The particular Spotted Gum displays some signs of regrowth, suggesting that it is still fighting to survive. However, the overall prognosis remains cautious and uncertain, emphasising the need for vigilant monitoring and care.

What Are the Prospects for Recovery of This Tree?

The extent of damage the tree sustained heavily relies on how much of the cambium layer was destroyed and whether the root system also suffered from the earthing strike. Understanding these factors is paramount for determining the tree's future viability and health.

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

• 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 substantial deadwood present in the canopy poses a significant falling hazard and requires prompt attention to ensure safety for both people and property.
• Vigilance for secondary infections: The wounds created by a lightning strike can serve as entry points for fungal diseases and wood-boring insects. A compromised tree is a vulnerable tree that necessitates close observation and care to prevent further damage and deterioration.
• Regular evaluations: The amount of regrowth observed in the coming months will provide valuable insights into the tree’s long-term prognosis. If the regrowth is robust and continues, there is hope for recovery. Conversely, if it stalls, 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 rare, they occur more frequently than many believe. Tall, isolated trees and those situated near water are statistically at a higher risk of being struck. Spotted Gums, similar to many eucalyptus species, are particularly conductive due to their moisture content and height, making them more susceptible to lightning strikes and electrical discharge.

If you notice a sudden or unexplained decline in a tree, especially following a storm, it is prudent to have an arborist evaluate it sooner rather than later. Early intervention provides the tree with the best chance for recovery and protects you from the dangers associated with a compromised tree that goes undetected, ensuring safety for your property and the surrounding 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 throughout Newcastle and the Hunter Region since 1998. We proudly hold ISO 9001, ISO 14001, and ISO 45001 certifications through Global Compliance Certification, showcasing our commitment to quality and environmentally responsible practices.

Frequently Asked Questions About 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 limited to one side of the trunk. The potential for recovery depends on the species, the tree's overall health before the strike, and the extent of damage to the conducting tissue. An evaluation by an arborist is essential for determining the prognosis and necessary interventions to facilitate recovery.

How can I tell if my tree has been struck by lightning?
Look for signs 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 in some cases, split wood or shattered branches. The presence of Lichtenberg figure burn patterns on the bark is a definitive indicator of lightning damage and should not be overlooked.

Is a tree that has been struck by lightning dangerous?
Yes, it can be. A tree that has sustained significant internal damage from a lightning strike may fail structurally without showing 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 safety for people and property. Prompt action can prevent potential hazards.

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

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