Outlook Online 2009

Great Barrier Reef Marine Park Authority :: Status of coral reefs

Status of coral reefs

Management Concern: High    

Adequacy of Information: Good

Summary extracts from Outlook Report 2009

  • Coral reef habitats are likely to be declining, more so in inshore areas, but the trends are difficult to interpret.
  • Available evidence indicates that the overall status of coral reefs on the Great Barrier Reef is relatively good, but is likely to be declining slightly, especially in inshore areas.  However, the picture is not simple or clear cut, with reefs in different regions showing enormous differences in trends, including both increases and declines. This is because coral reefs are naturally dynamic habitats, with cycles of disturbance and recovery. The challenge is to detect whether there are long-term trends hidden within natural cycles.
  • Marine tourism extends throughout the Great Barrier Reef but its impacts are concentrated in a few intensively managed areas.
  • There is limited information about many  targeted species and of the survival success of discarded species resulting in a poor understanding of the broad scale and cumulative ecosystem effects of fishing.
  • Illegal fishing is a threat to the Great Barrier Reef ecosystem. Incidents detected include incursion of foreign fishing vessels, fishing in zones closed to fishing, and use of fishing equipment or methods in zones where they are not permitted.
  • Further information is needed on the resilience of coral reef habitats and cumulative impacts of climate change and commercial and non-commercial use.
  • Most routine shipping activities have negligible consequences. Dredging and construction of port facilities can have significant, but localised impacts.
  • Increased concentrations of suspended sediments and agricultural chemicals are having significant effects inshore close to agricultural areas. Much continues to be done to improve water quality entering the Great Barrier Reef but it will be decades before the benefits are seen.

What do we know?

Relevant pages from Outlook Online include:

Existing policies and management actions

Future management requirements

  • Biodiversity strategy
  • Planned review of the Dredging and Spoil Disposal policy
  • Overarching Great Barrier Reef Tourism Strategy
  • Great Barrier Reef Recreation Strategy

Defined research questions

  • What are the key indicators of coral reef resilience to climate change and how can these indicators be detected and measured?
  • What will be the interaction dynamics between algae, coral polyps and herbivores under different climate scenarios?

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