Belgian town shocked as agency allows iconic oak tree to die for ecological reasons

A decision by the Agency for Nature and Forest (ANB) to let an iconic American oak tree on the Wilgenduin heathland in Kalmthout, Belgium, die has deeply upset local residents. The tree, a prominent feature of the landscape, is being "ringed" – a process where a ring of bark is removed around the trunk to halt its growth and eventually kill it.

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This tree defines the landscape. Many Kalmthout residents feel connected to it.

Mayor Lukas Jacobs expressed the community's shock and dismay, stating, "This is an iconic tree that defines the landscape. Many Kalmthout residents feel connected to it." He described the tree as a "culturally historic landmark" whose disappearance is felt keenly. The ANB's action has sparked considerable debate in local Facebook groups, with many expressing incomprehension and distress over the planned demise of the well-loved tree.

The ANB justifies its decision on ecological grounds, asserting that the American oak has an excessive impact on its environment. According to the agency, the tree consumes a significant amount of water, potentially harming other local flora and fauna. Furthermore, its acorns are said to promote "verbossing," an overgrowth of trees that can disrupt the delicate balance of the heathland ecosystem. The ANB highlights that the tree's ability to remain lush during a dry period demonstrates its substantial water uptake, which affects groundwater vital for species at the base of the dune and the adjacent fen.

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A culturally historic landmark of a tree is disappearing.

While Mayor Jacobs acknowledges the ecological arguments, he also voiced criticism regarding the abruptness and lack of prior communication surrounding the decision. "I often miss good communication and explanation about nature management projects in the Kalmthout heath," he stated. He believes that while ecological reasons are valid, some trees should be left untouched. The municipality has arranged discussions between the ANB and concerned residents to address the community's concerns and improve future communication about nature management actions.

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I often miss good communication and explanation about nature management projects in the Kalmthout heath.

Jeroen Denaeghel, a spokesperson for the ANB, emphasized the necessity of such choices, especially during dry periods. "Especially in dry times, we have to make choices that sometimes go against people's emotions," he explained. He pointed out that the unchecked spread of the oak could lead to the death of the fen and contribute to the proliferation of species like purple moor grass, which has been implicated in large-scale fires in other regions. The agency stresses that preserving the vulnerable heathland ecosystem requires difficult decisions, even when they are emotionally challenging for the local population.

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The fact that the oak in question is still so full and green on top of an important infiltration dune during a very dry period shows how much water it draws with its roots. That groundwater is vital for all species at the foot of the dune and the fen east of the Wilgenduin.