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Environmental Health Report: Climate change effects on marine harmful algal blooms in Aotearoa NZ

Please note: As of 1 July 2025, the New Zealand Institute for Public Health and Forensic Science (PHF Science) is the new name for the Institute of Environmental Science and Research (ESR). Research and reports published prior to this date may reference the organisation’s former name.

Summary

Harmful algae blooms (HABs) occur world-wide and Aotearoa New Zealand has experienced its share of significant bloom events. This report reviews how climate change will likely impact marine HABs in Aotearoa New Zealand and how these changes could affect public health.

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