Lightning Strikes Spotted Gum Tree in Adamstown Heights

Understanding the Effects of Lightning Strikes on Trees

About six months ago, a remarkable incident occurred when a bolt of lightning struck a stunning Spotted Gum (Corymbia maculata) in Adamstown Heights. The homeowner, who witnessed this extraordinary event, immediately reached out to Waratah Professional Tree Care. Our experienced senior arborist, Steve, quickly arrived to assess the damage. He carried out a thorough evaluation of the tree's condition and performed a remedial prune, which significantly improved its chances of recovery. The entry and exit wounds from the lightning strike were vividly visible, while the nearby tree endured severe damage, losing all its foliage due to the tremendous force of the lightning.

The homeowner noticed a significant decline in the tree's health and subsequently requested Steve to return for a follow-up assessment to determine the tree's prospects for recovery following this unfortunate incident.

What Are the Consequences of Lightning Strikes on Trees?

The distinctive charred patterns, known as Lichtenberg figures, were prominently visible on the bark of the trunk. Both the entry wound, where the lightning struck, and the exit wound, where it earthed, were clear and unmistakable signs of the strike.

Lightning does not merely scorch the outer bark of a tree; the internal damage it causes can be significantly more severe and extensive. 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, primarily moving through the water-conducting tissue just beneath the bark. The heat generated is extreme and instantaneous, effectively boiling the sap within the cambium layer, a thin band of living cells responsible for the tree's growth and the transport of essential nutrients and water throughout the structure.

Once the cambium layer is compromised, the tree loses its ability to transport sugars from the leaves down to the roots, as well as water from the roots to the leafy canopy. The affected cells perish, growth halts, and overall vitality diminishes. This loss critically undermines the structural integrity of the tree, making it a potential hazard to its surroundings.

The tree does not die immediately, which is why the decline may take weeks or even months to manifest visibly. This specific Spotted Gum displays some regrowth, indicating that it is still struggling to survive. However, the overall prognosis remains uncertain and cautious, requiring ongoing monitoring and care to determine its future.

What Are the Chances of Recovery for This Tree?

The extent of the damage sustained by the tree heavily depends on how much of the cambium layer was destroyed and whether the root system also suffered from the earthing strike. The evaluation performed by Steve revealed several urgent priorities that need to be addressed:

• Immediate safety measures: Monitoring the structural integrity of the tree is crucial. A tree struck by lightning may appear stable while being significantly weakened internally. Any substantial deadwood present in the canopy poses a falling hazard and requires immediate attention to ensure safety.
• 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 ongoing care to prevent further decline 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 potential 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 Worried About Lightning Strikes Impacting Your Trees?

While lightning strikes are relatively rare occurrences, 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 impressive height, making them more susceptible to lightning strikes.

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, which can pose serious risks to people and property.

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.

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 hinges on the species, the overall health of the tree prior to the strike, and the extent of damage to the conducting tissue. An evaluation by an arborist is essential to determine the prognosis and appropriate care.

How can I identify 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, visible 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 pose a danger. A tree that has sustained 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.

What actions 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 thoroughly 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, which could lead to dangerous 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 from $110.
Contact us at (02) 4956 6602.