“Our model shows the overall proportions of a mature, healthy kauri, including its massive, spreading root system, which is a very important part of the kauri protection message,” says Parker.
Kauri need protection from a dieback disease caused by a microscopic soil-borne organism called Phytophthora agathidicida, or PA, that affects kauri through its roots, damaging the tissues that carry nutrients and water and effectively starving the tree.
“The best way to protect kauri is by stopping the movement of dirt around kauri roots. Therefore, we wanted to show the root system to illustrate the size of the area that is at risk. Humans are one of the main ways of moving the disease as we can easily move the pathogen from site to site, by spreading dirt on our footwear, tyre treads and equipment.”
Waikato Regional Council has been helping community groups introduce kauri protective behaviours, such as installing hygiene stations; supporting farmers to fence off kauri areas to prevent stock incursion; and supporting Thames-Coromandel District Council to deliver a track ambassador programme in the Coromandel Peninsula over summer.
Stopping the movement of dirt around kauri is the best way to protect kauri.
• Construct fences to keep out stock — the council has specific funding to help with fencing costs.
• Stop the movement of dirt around kauri, including by cleaning footwear and ensuring all your gear is dirt free before and after entering a forest.
• Stay on the track when enjoying a walk in kauri forests.