A new study suggests kauri dieback in Northland might be connected to the lack of protective fungi in plantation pine forest soil.
The study, by Bio-Protection Research Centre PhD candidate Alexa Byers and others, looked at the differences in the bacteria and fungi living in the soil of kauri forest and surrounding pine plantations in the Waipoua area of Northland.
Now the experts need to understand what part, if any, this plays in the spread of kauri dieback, before they can determine if the information can be used to help fight the spread of the disease.
Published in FEMS Microbiology Ecology, the study found soil in the pine forests neighbouring kauri forests lacked several species of fungi and bacteria that protect plants, promote growth and improve their health (for example, Trichoderma and Pseudomonas).
"The loss of core microbiota from native soil microbial communities … surrounding remnant kauri fragments could be altering the forest's ability to respond to pathogen invasion," Byers wrote in the study.