We have monitored coral within the Great Barrier Reef World Heritage Area with James Cook University since 2006. Coral communities are a critical coastal marine habitat and a key indicator of overall marine health. We currently survey over 3km of paths across six inshore islands near our three east coast ports.
In the dashboard below you can view coral data from the past ten years.
We monitor diversity and abundance of corals and algae; extent of juvenile recruitment (baby corals); and indicators of coral health such as incidence of bleaching, disease and sediment deposition. This long-term data set can be used to help understand the dynamics and resilience of inshore coral communities and to support coastal resource management of our waterways.
Our twice-yearly coral surveys are undertaken by Sea Research Pty Ltd, coordinated by scientists at James Cook University (JCU). Through JCU and NQBP's higher education partnership, our monitoring program has the potential to support wide-ranging research opportunities.
Our coral data also feeds into broader Great Barrier Reef and regional report cards, including the Healthy Rivers to Reef Report Card, which measure the inshore health and resilience of coral communities and define their regional condition across catchments. You can read more on how we monitor coral including how divers collect data.
More information on the broader reef health is available at the Great Barrier Reef Marine Park Authority website.
What makes up a coral community
At each of our monitoring sites, benthic (seafloor) cover is classified into categories of cover type. The data we collect here provides information on the dominant reef structure (hard or soft), as well as the extent of macroalgae and sponges. Knowing the proportion of macroalgae and sponges is important to understanding the condition of the coral community.
Click on the images to learn more about the different coral and other cover types.
-
1. Please note y-axis max differs between Drivers of Health and Benthic Composition charts.2. SEs (standard errors) can be accessed in the full reports on our reports and research page.3. Divers of Health chart represents pre-wet survey dates only, full survey data can be found in reports download4. Note: Small sponge readings up to approx 0.3 % may not be visible. Please refer to the downloadable data file.
We survey transects (paths) across each of our island communities in the Mackay and Hay Point region, both pre and post-wet season. The inshore communities have been monitored since 2006; with Keswick Island monitoring completed from 2015. At each transect, benthic (seafloor) cover is classified into categories of cover type and provides information on the dominant reef structure (hard or soft), as well as the extent of macroalgae, which can impede the growth of corals. Information on the extent of bleached, diseased or damaged corals is also determined, which provides information on the health of the coral community. Click below on each monitoring location.
Coral and Benthos Cover at Hay Point & Mackay
Corals and benthos (sea floor) cover naturally acclimatise to disturbances like cyclones, high water temperatures, and freshwater influx and elevated turbidity (sediment in water) from flooding. Measuring coral cover, alongside diversity, juvenile recruitment, and bleaching and disease, can help us to anticipate recovery potential.
What the chart shows
Total hard coral cover has consistently been highest at Keswick Island (approximately 30% during recent surveys), compared to the three inshore locations.
Over the past 12 months, hard coral cover has started to increase significantly following 2017 Tropical Cyclone Debbie in the three inshore locations. The only exception is the decrease seen at Keswick Island due to disease prevalence between July 2018 and Jan 2019. Read more on cyclone impacts on the coral near our ports.
You can see more analysis on the data in these reports.
Hard coral cover at Hay Point & Mackay
1. Please note y-axis is dynamic and therefore differs between each tab.2. SEs (standard errors) can be accessed in the full reports on our reports and research page.3. Note: Pre and post wet season annual surveys commenced in 2015.What the chart shows
Soft corals have never been common in the inshore islands monitored (historically ranging from 2% to 9% of cover); however, they have consistently been significantly more abundant on Round Top and Keswick. Most recently, soft corals accounted for between 6% and 9% of cover on these two islands.
Between July 2018 and June 2019, soft coral cover increased significantly at Round Top, but has declined more recently. It has fluctuated at Keswick and only increased marginally at Slade and Victor. Read more on cyclone impacts on the coral near our ports.
You can see more analysis on the data in these reports.
Soft coral cover at Hay Point & Mackay
1. Please note y-axis is dynamic and therefore differs between each tab.2. SEs (standard errors) can be accessed in the full reports on our reports and research page.3. Note: Pre and post wet season annual surveys commenced in 2015.What the chart shows
Four extreme cyclonic weather events impacted these inshore island locations between 2010 and 2017. (Cyclone Yasi occurred in January 2010.) These events not only had significant effects on hard coral cover - with reduction at Slade Islet and Round Top - but also preceded a marked increase in macroalgae at all locations.
From 2010 to 2017 Macroalgae increased from 6% to 22% on Round Top Island, from 15% to 25% on Slade Islet and from 21% to 28% on Victor Islet. At Keswick, where monitoring began in 2015 macroalgae decreased from 41% to 27% in 2017. Read more on cyclone impacts on the coral near our ports.
You can see more analysis on the data in these reports.
Macroalgae cover at Hay Point & Mackay
1. Please note y-axis is dynamic and therefore differs between each tab.2. SEs (standard errors) can be accessed in the full reports on our reports and research page.3. Note: Pre and post wet season annual surveys commenced in 2015. -
1. Please note y-axis max differs between indicators of health and benthic composition charts.2. SEs (standard errors) can be accessed in the full reports on our reports and research page.3. Indicators of health chart represents pre-wet survey dates only, full survey data can be found in reports download4. Note: Small sponge readings up to approx 0.3 % may not be visible. Please refer to the downloadable data file.
We survey transects (paths) across each of the two island communities in the Abbot Point region, both pre- and post-wet season. At each transect, benthic (seafloor) cover is classified into categories of cover type and provides information on the dominant reef structure (hard or soft), as well as the extent of macroalgae, which can impede the growth of corals. Information on the extent of bleached, diseased or damaged corals is also determined, which provides information on the health of the coral community. Click below on each site.
Coral and Benthos Cover at Abbot Point
Corals and benthos (sea floor) cover naturally acclimatise to disturbances like cyclones, high water temperatures, and freshwater influx and elevated turbidity (sediment in water) from flooding. Measuring coral cover, alongside diversity, juvenile recruitment, and bleaching and disease, can help us to anticipate recovery potential.
What the chart shows
Surveys at Abbot Point commenced in 2016. A clear impact from Tropical Cyclone Debbie was shown 18 months later at Holbourne Island, which was most affected, given the cyclone's trajectory. Holbourne Island has struggled to recover from these impacts and has also been predated by crown-of-thorns.
Camp Island hard coral communities, however, were somewhat protected by the angle of approach of the cyclone and have shown strong recovery since then. At the most recent survey, however, coral bleaching was found to be affecting corals at all locations, with just below 40% of corals bleached and a high percentage of mortality at Camp Island (cover reduced from 24% to 17%).
You can see more analysis on the data in these reports.
Hard coral cover at Abbot Point
1. Please note y-axis is dynamic and therefore differs between each tab.2. SEs (standard errors) can be accessed in the full reports on our reports and research page.What the chart shows
Surveys at Abbot Point commenced in 2016. A clear impact from Tropical Cyclone Debbie was shown 18 months later at Holbourne Island, which had a high soft coral cover prior to this and has struggled to recover since.
While appearing slow to recover, the soft coral increases shown since 2018 for Holbourne are significant and indicate potential improvement in recovery rate. Camp Island communities however have never recorded high percentages of soft coral cover, being dominated by hard corals, such as the fast growing Acropora spp. corals (47%) and Montipora spp. (39%).
You can see more analysis on the data in these reports.
Soft coral cover at Abbot Point
1. Please note y-axis is dynamic and therefore differs between each tab.2. SEs (standard errors) can be accessed in the full reports on our reports and research page.What the chart shows
Holbourne Island is a more mid-shelf location than Camp Island. As is usually the case on inshore fringing reefs, reefs around this island did not show high levels of macroalgae. Cover during the most recent surveys was only around 1.5%.
Camp Island, by comparison, was found to have much higher macroalgae cover at 35%; nonetheless, this was a significant reduction from 41% previously recorded. The decrease was likely influenced by normal seasonal nutrient fluctuations.
The main influences on coral health at Holbourne Island are predation by sea snails and crown-of-thorns, rather than macroalgae. By comparison, the coral communities at Camp Island appear more susceptible to the higher levels of macroalgae and to high temperatures causing bleaching effects.
You can see more analysis on the data in these reports.
Macroalgae cover at Abbot Point
1. Please note y-axis is dynamic and therefore differs between each tab.2. SEs (standard errors) can be accessed in the full reports on our reports and research page.
Marine monitoring at NQBP
We conduct a wide range of marine monitoring at our ports and in the surrounding Great Barrier Reef World Heritage Areas year-round. Kevin Kane, NQBP director environment, and our partners at James Cook University's TropWATER, take us on a tour.
Long-term data for long-term management
NQBP undertakes a comprehensive ambient marine monitoring program, looking at a variety of elements including seagrass, coral and water quality.
Ambient, or ongoing, monitoring programs don't just analyse what happens around a particular activity; they look at what happens all year round. Ongoing monitoring is important, because it captures both naturally occurring patterns and any interruptions to these patterns. It allows us to establish baseline conditions and a natural range for our areas.
Learn more about how we collect some of our data and how it gets put to use.
