Inshore South

The northern boundary of the South inshore reporting zone extends due eastward from the mainland just south of the Moresby River at Double Point to the boundary of the offshore waters and includes enclosed coastal, open coastal and mid-shelf waters.

The southern boundary of the South zone extends east from the North West bank of the Seaforth Channel mouth, just south of Hinchinbrook Island, to the offshore boundary.

The major rivers discharging into the South zone are the Tully River and the Murray River. The Hull River discharges to the north of the Tully River. Several smaller waterways drain sub catchments that are dominated by agricultural land use, for example Liverpool Creek and Maria Creek, which discharge into the South zone. Numerous smaller creeks discharge to the north of and within Hinchinbrook Channel.

Water quality in the South inshore zone is affected by plumes of sediments, nutrients and pesticides from rivers and creeks discharging directly into the zone but also from the plumes of southern rivers, particularly the Herbert and also the Burdekin located in the Dry Tropics NRM region.

The area includes the Barnard Island group some 7 km east of Cowley Beach, North and South Dunk Island some 7.5 km south east of Mission Beach, and the Bedarra Island group located several kilometres south of the Dunk Island group. The area also includes Hinchinbrook Island. These islands provide fringing shallow water environments that support coral reef ecosystems and intertidal and subtidal reef seagrass meadows. Extensive seagrass meadows fringe the northern and western coastal areas of Hinchinbrook Island. Intertidal coastal seagrass meadows also occur close to the mainland including Lugger Bay approximately 10 km south of Mission Beach.

Scroll down for further detailed results for each indicator group.

Grading

gradesa1

very good

gradesb1

good

gradesc1

moderate

gradesd1

poor

gradese1

very poor

gradesnd1

insufficient data

gradesna1

not applicable

Confidence surrounding the data used in the circle diagrams has been assessed using a multi-criteria framework.

confidence

Water quality

Hover over each segment for indicator scores and data confidence.

The overall water quality grade in 2014/15 for the South inshore zone is ‘moderate’ (56.1).

Water quality grades are based on water quality guideline trigger values established for the waters of the Great Barrier Reef Marine Park that, if exceeded, identify the need for management responses. The guidelines are not targets and are not an assessments of pollutant loads entering the marine environment.

The results are derived from in-situ water samples taken at ten locations and from water quality loggers at two locations from inshore waters extending from sites to the north of Kurrimine Beach to the south of Tully Heads. In addition a passive contaminant sampler is located at Dunk Island.

The water clarity score of 35.1 (poor) in the South zone is comprised of total suspended solids (poor) and Turbidity (moderate).

Nutrients scored 38.5 (poor) in the South zone, comprising of ‘very poor’ for oxidised nitrogen (NOx), a ‘poor’ for particulate nitrogen (PN) and a ‘good’ for particulate phosphorus (PP).

The chlorophyll a score in the South zone was 54.7 (moderate).

Using the Photosystem II herbicide equivalent concentrations method, contaminants received a score of 96.0 (very good).

The ‘very poor’ score for NOx in the South zone may be influenced by the cluster of water quality monitoring sites close to the Tully River mouth and the coastal areas.

Coral

Hover over each segment for indicator scores and data confidence.

The overall coral grade in 2014/15 for the South inshore zone is 48.2 (moderate).

The coral grade is comprised of the density of juvenile hard corals score of 94 (very good), the macroalgae cover score of 31 (poor), the coral cover score of 25 (poor), the change in coral cover score of 57 (moderate), and the coral community composition score of 33 (poor).

In the South zone, in the absence of any acute disturbance events, scores for the majority of coral indicator metrics have improved over the last two years. Improvement across a range of indicators provides a positive indication of the coral community resilience.

This explanatory information of coral condition in the South zone is based on the Marine Monitoring Program report by Thompson et al. (2016).

Seagrass

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The overall seagrass grade in 2014/15 for the South inshore zone is 20.2 (very poor).

The seagrass grade is comprised of the seagrass abundance score of 1.3 (very poor), the tissue nutrient score of 29.4 (poor), and reproductive effort score of 30.0 (poor) from the Marine Monitoring Program.

In the South inshore zone rainfall, river discharge and wind exposure during 2014-15 were below long term averages and represent less stressful conditions than in the previous monitoring period, whilst seawater temperatures were above long term averages and were likely to be more stressful than the previous monitoring periods. Seagrass meadows in the South zone are in a vulnerable state.

This explanatory information of seagrass condition in the South zone is based on the report by McKenzie et al. (2016).

Fish

Hover over each segment for indicator scores and data confidence.

The fish index is currently under development and will be available in future report cards.

Further information on the methods used to produce the scores and grades and detailed results can be found here.