Outlook Online 2009

Great Barrier Reef Marine Park Authority :: Status of corals

Status of corals

Management Concern: High     Adequacy of Information: Good

Summary extracts from Outlook Report 2009

  • There are more than 500 species of corals, with localised declines in some hard corals and limited information about soft corals, sea pens and sea fans.
  • Since the 1980s, coral, particularly hard corals, have been affected by temperature-induced mass bleaching events. In future, these events are likely to become more frequent and more severe and, increasingly, hard corals will be exposed to the damaging effects of ocean acidification.
  • Anchoring of tourism vessels has the potential to damage corals. Diving and snorkelling can cause localised damage to coral. There are now a range of mandatory and voluntary management arrangements that minimise the impact of commercial tourism operations in the great Barrier Reef, such that the impacts associated with tourism activities are seen as minor.
  • The broad scale and cumulative ecosystem effects of fishing on coral reefs are little studied.
  • There have been few studies on the impacts of recreational use on the Great Barrier Reef ecosystem. Localised but frequent anchor damage to corals is a likely impact, along with littering, boat strikes on marine mammals and turtles, and fin damage to corals when snorkelling and diving.
  • Much of the research activity on the Great Barrier Reef is confined to areas surrounding the six island research stations. With ongoing management, any impacts of research are likely to be small and localised in the immediate area of study.
  • There are fewer species of both hard and soft coral inshore adjacent to developed areas. Generally, the number and variety of corals increases with distance from river mouths, showing the important role that water quality plays in coral health.

What do we know? (relevant pages from Outlook Online)

Existing policies and management actions

Future management requirements

  • Biodiversity strategy
  • Overarching Great Barrier Reef Tourism Strategy
  • Great Barrier Reef Recreation Strategy

Defined research questions

  • What are the key factors that lead to coral bleaching and how can these be predicted?
  • To what extent can coral species acclimate and / or adapt to climate driven stressors?
  • What is the adaptation potential of corals to the predicted impacts of climate change?

Current Research and Monitoring

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