# Did Australian policy prepare for a harmful algal bloom with significant human health impacts? Analysis and lessons from South Australia

**Authors:** Frances Baum, Matthew Fisher, Diana Bogueva, Amanda Hayes, Helen Miller, Dora Marinova

PMC · DOI: 10.1093/heapro/daaf240 · Health Promotion International · 2026-01-21

## TL;DR

Australian policies were poorly prepared to handle a harmful algal bloom that impacted human health and local industries in South Australia.

## Contribution

The study reveals gaps in Australian public policies regarding preparation for harmful algal blooms and their health impacts.

## Key findings

- Policies only had brief mentions of harmful algal blooms.
- Economic concerns were prioritized over human health in strategic actions.
- There was minimal focus on intersectoral collaboration to address the issue.

## Abstract

A harmful algal bloom (HAB) has spread to a third of South Australia’s coasts, has devastated marine life and is affecting human physical and mental health and the fishing and tourism industries. We examine Australian Federal and State environmental and agricultural public policies to determine how well they were prepared to prevent and respond to a HAB with human health consequences. Document analysis techniques were used to examine the framing of 63 Australian public policies selected from a data set of 180. All documents were coded in Nvivo and analysed for their content relevant to HABs. In the policies, we only found cursory mentions of HABs. We identified three main issues in terms of their attention to HABs. First, there was no evidence of policies that would have led to any detailed planning for a HAB. Second, in terms of strategic actions, economic considerations are uppermost. Third, we found little consideration of direct human health impacts or of intersectoral collaboration on the issue. Our policy analysis indicates a lack of attention, and so preparedness, for the South Australia HAB. Public policy in all countries needs to prepare better for climate-related disasters and act faster to reduce global warming.

## Full-text entities

- **Diseases:** WA (MESH:D020241), communicable diseases (MESH:D003141), distress (MESH:D012128), respiratory, eye, and skin irritation (MESH:D005128), shortness of breath (MESH:D004417), environmental loss (MESH:D018876), respiratory symptoms (MESH:D012818), HAB (MESH:D001816), zoonoses (MESH:D015047), Toxic (MESH:D064420), deaths (MESH:D003643), lung diseases (MESH:D008171), cough (MESH:D003371), shock (MESH:D012769)
- **Chemicals:** carbon (MESH:D002244), Ag (MESH:D012834), reactive oxygen species (MESH:D017382)
- **Species:** PX clade (clade) [taxon 569578], Karenia cristata (species) [taxon 234598], Delphinidae (marine dolphins, family) [taxon 9726], Karenia mikimotoi (species) [taxon 225107], Homo sapiens (human, species) [taxon 9606], Rubroshorea almon (species) [taxon 292004], Phyllopteryx taeniolatus (common seadragon, species) [taxon 161469], Selachii (sharks, infraclass) [taxon 119203], Sepiidae (cuttlefishes, family) [taxon 6608], Karenia brevis (species) [taxon 156230]

## Full text

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## References

66 references — full list in the complete paper: https://tomesphere.com/paper/PMC12822599/full.md

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Source: https://tomesphere.com/paper/PMC12822599