Karla Butcher; Hauraki Gulf Environment Award
Karla was the 2025 recipient of the Hauraki Gulf Environment award.
At our meeting, she updated us on her research into the biosecurity of the Hauraki Gulf. She explained the concept of invasive species and the importance of biosecurity in preventing negative impacts. Her research is focused on the biosecurity risks associated with potted plants and potting mix used in restoration projects.
She told us about the use of environmental DNA (eDNA) to detect invasive species in samples taken from potted plants and potting mix.
Karla presented her findings to us, noting that biosecurity measures for potting mix are effective for animal contaminants but not for fungal contaminants. She highlighted the presence of various contaminants in potted plants and potting mix, including arthropods, mollusks, and decomposer and symbiotic fungi.
Karla has concluded through her research that potted plants may pose a biosecurity risk due to the presence of hardy species that resist high heat treatment. She emphasizes the importance of her research in informing local councils and government about potential biosecurity risks.
Concluding Carla mentioned that her research is the first to use eDNA for terrestrial biosecurity research in New Zealand and globally for assessing modern mass pathways. Finally, She thanked the club for facilitating her research and shared her pride in the work done.