Terrestrial habitats that support the Great Barrier Reef continued
Current summary and assessment components Very good Assessment grade Good Poor Very poor Confidence Grade
Not assessed Not assessed
Woodlands and forests: There have been significant losses of woodlands and forests in much of the catchment, particularly in the Burdekin and Fitzroy regions. Rainforests: The greatest losses of rainforest have been in the Wet Tropics, Fitzroy and Burnett Mary regions. Wet Tropics rainforests have been protected since their inscription on the World Heritage list. Trend since 2009
There is some habitat loss, degradation or alteration in some small areas, leading to minimal degradation but no persistent, substantial effects on populations of dependent species.
All major habitats are essentially structurally and functionally intact and able to support all dependent species.
Habitat loss, degradation or alteration has occurred in a number of areas leading to persistent substantial effects on populations of some dependent species.
There is widespread habitat loss, degradation or alteration leading to persistent, substantial effects on many populations of dependent species.
New assessment for this report; no trend provided
Adequate high-quality evidence and high level of consensus Limited evidence or limited consensus Inferred, very limited evidence
3.7.5 Outbreaks of disease, introduced species and pest species
Outlook report 2009: Assessment summary Outbreaks of diseases appear to be becoming more frequent and more serious on the Great Barrier Reef. Outbreaks of pest species appear to be above natural levels in some areas.
Current summary and assessment components Outbreaks of disease, introduced species and pest species: Coral disease is being increasingly observed on the Great Barrier Reef and is predicted to increase in the future. There are few incidences of other disease and introduced species in the marine environment and they tend to be localised. Outbreaks may be becoming more frequent as ecosystem conditions decline. The overall assessment of ‘poor’ is due to the severity of outbreaks of crown-of-thorns starfish which seriously affect coral reef habitats on a large scale. Outbreaks of disease: Disease has affected corals, green turtles, dugongs and the Queensland groper in recent years. Most outbreaks have not been recorded on a wide scale. Outbreaks of crown-of-thorns starfish: Growing evidence indicates ecosystem conditions may have resulted in more frequent outbreaks of crownof-thorns starfish over the last 30 years across much of the Region. These have seriously affected the ecosystem. Introduced species: Introduced marine species continue to be recorded in and adjacent to the Region. Introduced weeds have affected a number of islands within the Region. Other outbreaks: Outbreaks of some other species are likely to have resulted from declining ecosystem conditions.
Assessment grade and trend
Very good Good Poor Very poor Grade Trend
Trend since 2009
No records of diseases above expected natural levels; no introduced species recorded; pests populations within naturally expected levels.
Disease occasionally above expected natural levels but recovery prompt; any occurrences of introduced species successfully addressed; pests sometimes present above natural levels with limited effects on ecosystem function.
Unnaturally high levels of disease regularly recorded in some areas; occurrences of introduced species require significant intervention; pests outbreaks in some areas affecting ecosystem function more than expected under natural conditions.
Unnaturally high levels of disease often recorded in many areas; uncontrollable outbreaks of introduced pests; opportunistic pests seriously affecting ecosystem function in many areas.
h n i 0
Improved Stable Deteriorated No consistent trend