Spotted Gum Tree in Adamstown Heights Struck by Lightning

Understanding the Effects of Lightning Strikes on Trees

Around six months ago, an extraordinary incident occurred when a bolt of lightning struck a magnificent Spotted Gum (Corymbia maculata) in Adamstown Heights. The eyewitness, captivated by this astonishing spectacle, immediately contacted Waratah Professional Tree Care. Our experienced senior arborist, Steve, responded promptly to assess the damage. He conducted an in-depth evaluation of the tree's condition and performed a remedial prune, significantly increasing the tree's chances for recovery. The entry and exit wounds from the lightning strike were clearly visible, while a nearby tree experienced severe damage, losing all its foliage due to the extraordinary force of the lightning strike.

The customer 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 recovery potential after the incident.

What Are the Consequences of Lightning Strikes on Trees?

The charred electrical patterns, referred to as Lichtenberg figures, were prominently visible on the bark of the trunk, marking the exact locations of the lightning impact. 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 widespread. This internal destruction can lead to long-term health issues for the tree.

When a bolt of lightning strikes a tree, the immense electrical charge moves through the tree, following the path of least resistance to the ground, typically traversing through the water-conducting tissue located 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 crucial for the tree's growth and the transport of essential nutrients and water throughout the tree.

Once the cambium layer is breached, the tree loses its ability to move sugars from the leaves down to the roots and water from the roots to the leafy canopy. The affected cells die, growth ceases, and overall vitality diminishes. This loss critically undermines the structural integrity of the tree, making it a potential safety hazard.

The tree does not perish immediately, which is why the decline may take weeks or even months to become visually apparent. This specific Spotted Gum shows some signs of regrowth, suggesting it is still fighting for survival. However, the overall prognosis remains uncertain and cautious, requiring ongoing monitoring and care.

What Are the Chances for Recovery of This Tree?

The extent of damage sustained by the tree heavily depends on the degree of destruction to the cambium layer and whether the root system also suffered from the earthing strike. Understanding these factors is essential for assessing recovery potential.

Steve’s assessment highlighted several urgent priorities:

• Immediate safety measures: It is vital to monitor the structural integrity of the tree closely. A tree that has experienced a lightning strike may appear stable while being significantly weakened internally. Any substantial deadwood present in the canopy poses a falling hazard and requires prompt attention to ensure safety for those nearby.
• Vigilance 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 careful observation and ongoing care to prevent further decline and ensure its health.
• Regular evaluations: The amount of regrowth observed in the coming months will provide invaluable 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 Affecting Your Trees?

While lightning strikes are relatively rare events, they occur more frequently than many people realise. 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 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 undetected, which can pose serious risks to people and property.

In-Depth Examination 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 possess 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 before the strike, and the extent of damage to the conducting tissue. An evaluation by an arborist is crucial for determining the prognosis and necessary 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 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 vital 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 stay 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.