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By Katie Day
An emerging concern among ocean scientists, stewards and beachgoers is the impact that certain chemical sunscreens are having on the marine environment. This has led to bans on the sale and use of chemical sunscreens in states and island communities such as Hawaii, Key West and Aruba, and a proposed federal ban in all U.S. National Marine Sanctuaries containing coral reefs. There has also been a surge in the production of "reef friendly" sunscreens — but what does that actually mean, and how safe are these alternative sunscreens to the marine environment?
‘Dead Corals Don’t Make Babies’: New Great Barrier Reef Coral Growth Declined 89% After Back-to-Back Bleaching Events
A study published in Nature Wednesday found that the death of corals in 2016 and 2017 has significantly decreased the ability of new corals to grow and thrive. In 2018, there has been an 89 percent decline in the number of new corals on the reef compared to the historic record.
"Dead corals don't make babies," lead author and James Cook University professor Terry Hughes said, as BBC News reported.
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This month corals in Lord Howe Island Marine Park began showing signs of bleaching. The 145,000 hectare marine park contains the most southerly coral reef in the world, in one of the most isolated ecosystems on the planet.
That is because the Great Barrier Reef Marine Park Authority (GBRMPA) has approved plans to dump one million tonnes (approximately 1.1 million U.S. tons) of sludge into the World Heritage Site. The decision comes in the same month that runoff from flooding in Queensland, Australia threatened to smother part of the reef and two years after the unique ecosystem was weakened by back-to-back coral bleaching events caused by climate change.
The Florida Keys is home to the third largest living coral barrier reef system in the world. The ecosystem is a habitat for fish species and other marine life and also serves as economically important touristic and recreational spot.
The Great Barrier Reef has been hit hard by climate change. As waters warm, the higher ocean temperatures force the coral to expel the algae that lives inside of it, providing it with both its nutrients and its brilliant colors. If the water does not cool fast enough and the algae does not return, the coral dies.
The non-profit organization Great Barrier Reef Legacy and marine scientist Charlie Veron, a world expert on coral reefs, confirmed the diversity of the site, also known as the "Legacy Super Site" on the outer reef.
By Marlene Cimons
Much of the deep sea has never been explored close-up by humans. Some submarines have plumbed its depths, but reaching the ocean bottom is a complicated and expensive journey, challenging because the seabed lies under more than three miles of water, which exerts huge amounts of pressure. "We know more about space than about the bottom of the oceans in our own planet, even though more than two-thirds of the surface of the Earth is covered by marine sediments," said Olivier Sulpis, a researcher and doctoral student at McGill University's department of earth and planetary sciences.
Cauliflower coral, a bushy species in the Hawaiian Islands that has been devastated by ocean warming triggered by human-caused climate change, could soon get federal protection. The National Marine Fisheries Service Wednesday announced that listing the species may be warranted under the Endangered Species Act, based on a petition from the Center for Biological Diversity.
Conservative lawmaker Scott Morrison has forced out Malcolm Turnbull as Australian prime minister, the third time the country's leader has sunk over climate policy in the past decade, and the seventh since 1997, according to Australia's ABC News.
An internal Liberal party row started when Turnbull proposed modest emissions targets for the country's energy sector. He dropped the plans Monday after pressure from the party's right-wing faction, but that led to a narrowly defeated leadership challenge from Peter Dutton on Tuesday, then a final ousting from Morrison on Friday.