Spotted Gum Tree Struck by Lightning in Adamstown Heights

Understanding the Effects of Lightning Strikes on Trees

About six months ago, an extraordinary event occurred when lightning struck a distinguished Spotted Gum (Corymbia maculata) located in Adamstown Heights. The observer, who witnessed this remarkable phenomenon, immediately reached out to Waratah Professional Tree Care. Our experienced senior arborist, Steve, responded promptly to assess the situation. He undertook a thorough evaluation of the damage and executed a remedial prune, significantly improving the tree's chances of recovery. The entry and exit wounds from the lightning strike were readily apparent, while the adjacent tree was severely impacted, losing all its foliage due to the immense force of the lightning.

Following the event, the customer noticed a significant deterioration in the tree's health and requested Steve's return for a follow-up assessment to determine the tree's recovery prospects in the aftermath of the incident.

What Are the Consequences of Lightning Strikes on Trees?

The charred electrical patterns, known as Lichtenberg figures, were clearly 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 indicators of the strike's impact.

Lightning does not only singe the outer bark of a tree; the internal damage it incurs can be far more severe and widespread. When a bolt of lightning strikes a tree, the tremendous electrical charge flows through the tree, seeking the path of least resistance to the ground, typically moving through the water-conducting tissue situated just beneath the bark. The heat generated is intense and instantaneous, effectively boiling the sap within the cambium layer, which is a thin band of living cells crucial for the tree's growth and the transport of vital nutrients and water throughout.

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 halts, and overall vitality diminishes. This loss critically undermines the structural integrity of the tree, rendering it a potential hazard to its surroundings.

Although the tree does not die instantly, the signs of decline may take weeks or even months to become visible. This particular Spotted Gum exhibits some regrowth, indicating that it is still fighting for survival. However, the overall prognosis remains uncertain and cautious, necessitating ongoing monitoring and assessment.

What Are the Chances of Recovery for This Tree?

The degree of damage the tree sustained largely depends on how much of the cambium layer was destroyed and whether the root system also experienced harm from the earthing strike.

Steve’s assessment identified several urgent priorities:

• Immediate safety measures: It is essential to monitor the structural integrity of the tree. A tree that has been struck by lightning may appear stable while being significantly weakened internally. Any considerable deadwood present in the canopy poses a falling hazard and requires prompt attention to ensure safety.
• Vigilance for secondary infections: The wounds caused 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 close observation and ongoing care to prevent further decline and deterioration.
• Regular evaluations: The extent of regrowth observed in the upcoming months will provide valuable insights into the tree’s long-term prognosis. If the regrowth is vigorous 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 uncommon events, they are not as infrequent as many may assume. Tall, isolated trees and those located near water are statistically at a higher risk of being struck. Spotted Gums, like many eucalyptus species, are particularly conducive to lightning strikes due to their moisture content and impressive height, making them more susceptible to such occurrences.

If you notice a sudden or unexplained decline in a tree, especially following a storm, it is wise to have an arborist evaluate it as soon as possible. Early intervention provides the tree with the best chance for recovery and protects you from the dangers associated with a compromised tree that goes unnoticed, which can pose serious risks to people and property.

In-Depth Case Study Analysis

This assessment was conducted by Steve Brown, senior arborist at Waratah Professional Tree Care. Waratah has been providing 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 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 essential for determining the prognosis and appropriate care.

How can I tell 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, 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 sign of lightning damage.

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 collapse 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 should I do 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 offers onsite assessments across Newcastle and the Hunter Region starting from $110.
Contact us at (02) 4956 6602.