Australian scientists have found "incredibly high coral cover" in deeper sections of the Coral Sea relatively undisturbed by fishing and sedimentary run-off.

Gemma Galbraith is surprised by what she sees in the water below her dinghy as she bobs in the middle of the Coral Sea.

The highest number of reef fish were recorded at depths between 40 metres and 60 metres.

‘Just scratched the surface’ James Cook University marine ecology researcher Andrew Hoey said the study into deeper parts of the reef extended from a longer study into the effects of climate change and human disturbance in more shallow sections.

He said the lack of “localised” human disturbances usually encountered in shallow coral coastal populations — such as fishing and sedimentary run-off – could have facilitated higher coral coverage in deeper, remote parts of the Coral Sea.

“They do support sort of what we call near pristine populations of fish – they don’t see the fishing pressure that you do on a lot of the coastal reefs, especially some areas of the Great Barrier Reef, and then they’re not subjected to, frequent disturbance,” Professor Hoey said.

  • AutoTL;DR@lemmings.worldBEnglish
    1·
    1 year ago

    This is the best summary I could come up with:

    Gemma Galbraith is surprised by what she sees in the water below her dinghy as she bobs in the middle of the Coral Sea.

    Dr Galbraith, a research associate on the study and a vehicle pilot, said the technology was helping scientists better understand remote parts of the ocean.

    It is a place where light-dependent organisms such as coral and algae live alongside species that can survive in the low light conditions typically found in deep parts of the reef.

    Dr Galbraith said the project marked the first time that many of the deeper, mesophotic reef sites had been studied or viewed by people.

    “Definitely in some spots that we were not maybe expecting to see them, and where [there] is enough complexity and habitat there, there were some pretty diverse and abundant fish communities as well.”

    The scientists recorded 68 species of fish not previously known to live at that depth and coral coverage, including Randall’s tilefish, harlequin groupers and five-striped hogfish.

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