An international conservation group has said that the health of Australia’s Great Barrier Reef, world’s most extensive and spectacular coral reef ecosystem, is in a “critical state and deteriorating” as climate change warms up the waters in which it lies.
The largest reef system in the world – the Great Barrier Reef in Australia – has already lost more than half of its coral population in the past three decades.
And now, coral-bleaching in 2016, 2017 and 2020 has further damaged its health and affected its animal, bird and marine population, the International Union for Conservation of Nature said in a report.
Such bleaching occurs when hotter water destroys the algae which the coral feeds on, causing it to turn white, a Reuters report said.
The union moved the reef’s status to critical and deteriorating on its watchlist.
According to the union, some activities which threaten it, such as fishing and coastal development, can be tackled by the management authorities.
“Other pressures cannot be addressed at the site level, such as climate change, which is recognised as the greatest threat,” Reuters quoted the union as saying.
Progress towards safeguarding the reef under a long-term sustainability plan through to 2050 has been slow and it has not been possible to stop its deterioration, it said.
The turtle populations – including loggerhead, hawksbill and northern green – as well as the scalloped hammerhead shark, many seabird populations and possibly some dolphin species are declining.
Efforts to safeguard the reef are rising, however. HSBC and the Queensland government said in October they would buy “Reef Credits”, a tradable unit that quantifies and values the work undertaken to improve water quality flowing onto the reef.
Similar to the carbon offset market which incentivises the reduction of carbon dioxide from the atmosphere, the scheme pays landholders for improved water quality.
(With inputs from Reuters)