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Caulerpa Coverage Plummets After Cyclone, Cleanup Underway

1/30/2026

31 2 Full Breakdown

Summary

Story summary

Biosecurity New Zealand (Biosecurity NZ) confirmed a drastic reduction in caulerpa coverage off Aotea Great Barrier, likely linked to disturbances from Cyclone Tam.
Local hapu led cleanup efforts to prevent further spread.
Despite the decline, experts caution against complacency, noting potential regrowth.
A suction dredge to remove caulerpa is being developed, while community groups continue monitoring and managing the situation.

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Story summary

Biosecurity New Zealand (Biosecurity NZ) confirmed a drastic reduction in caulerpa coverage off Aotea Great Barrier, likely linked to disturbances from Cyclone Tam.
Local hapu led cleanup efforts to prevent further spread.
Despite the decline, experts caution against complacency, noting potential regrowth.
A suction dredge to remove caulerpa is being developed, while community groups continue monitoring and managing the situation.