In 2021, New Zealand discovered an invasive seaweed called caulerpa that has since spread rapidly.

The seaweed's resilience and adaptability have made it a formidable foe. It forms extensive meadows on the seabed, outcompeting native species for space and resources. The rapid growth of this invasive species poses significant ecological risks to New Zealand’s coastal waters.

Local authorities are now developing strategies to combat its spread, recognizing the threat it poses to marine biodiversity.

The long-term vulnerability remains high as caulerpa continues to adapt and expand, potentially altering local ecosystems permanently.

What is the long-term climate outlook for this region?

With ongoing efforts to control caulerpa, New Zealand must also prepare for future invasive species driven by changing ocean conditions. The seaweed's resilience highlights the need for robust monitoring and rapid response systems.

The outlook remains uncertain due to the unpredictable nature of invasive species.