Spotted Gum Tree Hit by Lightning in Adamstown Heights

Exploring the Effects of Lightning Strikes on Tree Health

About six months ago, a striking event unfolded when a bolt of lightning struck a magnificent Spotted Gum (Corymbia maculata) situated in Adamstown Heights. Following this dramatic occurrence, the concerned customer swiftly reached out to Waratah Professional Tree Care. Our experienced senior arborist, Steve, promptly arrived to carry out a meticulous assessment of the damage inflicted. He implemented a remedial prune aimed at improving the tree’s chances of recovery. The entry and exit wounds created by the lightning strike were clearly visible, while a neighbouring tree suffered catastrophic damage, losing all its foliage due to the immense force of the lightning strike.

The customer reported a significant decline in the tree's health, which prompted a request for Steve to return and reassess its potential for recovery after the incident. This ongoing concern underlines the necessity of professional evaluation in managing tree health following such traumatic events, ensuring that appropriate measures are taken to enhance the tree's survival prospects.

What Are the Effects of Lightning Strikes on Tree Structures and Health?

The burnt electrical patterns, recognised as Lichtenberg figures, were prominently displayed on the trunk's bark, clearly illustrating the lightning's path. The entry wound, where the lightning struck, and the exit wound, where it earthed, were unmistakable, indicating the severity of the incident.

Lightning does not merely scorch the outer bark of a tree; the internal destruction it causes can be considerably more severe and pervasive, profoundly affecting the tree's overall health and structural integrity. When lightning strikes a tree, the immense electrical charge travels through the tree, pursuing the path of least resistance to the ground, typically through the water-conducting tissue situated just beneath the bark. The heat generated is 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 movement of essential nutrients and water within the tree.

Once the cambium layer is compromised, the tree loses its capacity to transport sugars from the leaves to the roots and water from the roots to the leafy canopy. The affected cells die, growth ceases, and overall vitality diminishes, critically undermining the tree's structural integrity. The tree does not perish immediately following the strike, which is why the decline might take weeks or even months to manifest visibly. The particular Spotted Gum exhibits some regrowth, suggesting that it is still fighting for survival. However, the overall prognosis remains uncertain and cautious, emphasising the importance of ongoing monitoring and care to assess its recovery potential.

What Are the Long-term Recovery Prospects for This Tree?

The extent of damage sustained by the tree heavily depends on the amount of the cambium layer that was destroyed and whether the root system also experienced damage from the earthing strike. Understanding these factors is crucial in determining the tree's future and recovery potential.

Steve’s assessment identified several urgent priorities that need addressing:

• Immediate safety measures: It is imperative 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 falling hazard and requires prompt attention to ensure safety for 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 deterioration and damage.
• 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 vigorous 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 Impacting Your Trees?

While lightning strikes are relatively uncommon, they are not as rare as many might think. Tall, isolated trees and those positioned 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, particularly after a storm, it is advisable to have an arborist evaluate it as soon as possible. Early intervention offers the tree the best chance for recovery and protects you from the dangers associated with a compromised tree that goes unnoticed, ensuring safety for your property and the surrounding environment.

In-Depth Case Study Analysis

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, demonstrating 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 limited to one side of the trunk. The potential for recovery is contingent upon 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 essential for determining the prognosis and required 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, 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.

Is a tree that has been struck by lightning dangerous?
Yes, it can be. A tree that has suffered 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 safety for people and property.

What actions should I take if I suspect my tree has been struck by lightning?
Ensure that individuals 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 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 concerned about following storm damage or a lightning strike, Waratah Professional Tree Care provides onsite assessments across Newcastle and the Hunter Region starting at $110.
Contact us at (02) 4956 6602 for expert assistance.