Quantcast

5 Things to Know About the State of Our Oceans for World Oceans Day

Oceans
Tropical fish and turtle swim in the Red Sea, Egypt, an inlet of the Indian Ocean. vlad61 / iStock / Getty Images Plus

Saturday, June 8 is World Oceans Day, a chance to honor and celebrate our blue planet. Ocean lovers around the world will attend beach cleanings and other events or join a March for the Ocean to call for an end to activities that harm marine life, like offshore oil drilling and plastic pollution.


The oceans generate most of the oxygen we breathe, provide food and medicine and help keep our climate stable, according to the day's organizers. They are also home to amazing animals and ecosystems, like whales and coral reefs, that make the earth a more wondrous place to live. But the world's marine environments face unprecedented threats. Here are five things to know about the state of our oceans in 2019.

1. Ocean Plastics Are on the Rise

It's well-known that eight million metric tons of plastics enter the world's oceans every year. But a study published in April gave new insight into how plastic pollution has proliferated in the past six decades. Researchers found that equipment used to collect plankton had increasingly been disrupted by plastic since it first got entangled with fishing gear in 1957.

"The message is that marine plastic has increased significantly and we are seeing it all over the world, even in places where you would not want to, like the Northwest Passage and other parts of the Arctic," Marine Biological Association in Plymouth, England researcher Clare Ostle told The Guardian.

2. Plastic Pollution Threatens Marine Oxygen Production

All that plastic floating in the ocean kills one million birds and more than 100,000 marine mammals every year, according to the UK government. But a study published in May found it could have a disturbing impact on some of the ocean's smallest life forms as well. Scientists exposed the ocean's most abundant photosynthetic bacteria to chemicals that leach from plastic bags. The chemicals made it harder for the bacteria to grow and produce oxygen. This is scary because these bacteria are responsible for 10 percent of the oxygen we breathe.

"This study revealed a new and unanticipated danger of plastic pollution," paper co-author and Macquarie University research fellow Lisa Moore told The Independent.

3. Global Warming Is Already Putting Fish in Hot Water

The oceans and the creatures in them are also threatened by climate change, and a groundbreaking study published in March found that rising ocean temperatures are already shrinking fish populations. A University of Rutgers-led team discovered that sustainable fish populations had declined by an average of 4.1 percent over 80 years. That might not sound like a lot, but it actually amounts to 1.4 million metric tons of fish lost between 1930 and 2010. And in some regions the decline was more extreme: sustainable fish populations fell by 34 percent in the northeast Atlantic and 35 percent in the Sea of Japan.

"We were stunned to find that fisheries around the world have already responded to ocean warming," study co-author and Rutgers' Department of Ecology, Evolution, and Natural Resources associate professor Malin Pinsky told Rutgers Today. "These aren't hypothetical changes sometime in the future."

4. Marine Heatwaves Act Like Underwater Wildfires

Ocean warming doesn't just damage individual species. It devastates entire ecosystems. A first-of-its-kind study published in March found that the number of ocean heat wave days per year is surging: The number has increased by more than 50 percent between two 29-year time chunks compared by the scientists. This has particularly harmed coral reefs in the Caribbean, Australian sea-grass beds and California's kelp forests.

"You have heatwave-induced wildfires that take out huge areas of forest, but this is happening underwater as well," lead author Dan Smale at the Marine Biological Association in Plymouth, UK told The Guardian. "You see the kelp and seagrasses dying in front of you. Within weeks or months they are just gone, along hundreds of kilometres of coastline."

5. Ocean Acidification Makes Life Even Harder for Coral Reefs

Marine heat waves threaten coral reefs by causing coral bleaching, in which corals expel the algae that give them color and nutrients. But the greenhouse gasses we are pumping into the atmosphere also endanger coral in another way. They cause ocean acidification, which is what happens when carbon dioxide dissolves in seawater and changes its chemical makeup. This reduces the amount of calcium carbonate that animals like corals use to repair themselves after stressful events like bleachings. In research published just last week, scientists found that some corals and algae they studied were not able to adapt to more acidic waters. This could alter the composition and function of reefs.

"We found that corals and coralline algae weren't able to acclimatize to ocean acidification," study author Malcolm McCulloch said.

EcoWatch Daily Newsletter

People take part in a ceremony to mark the 'death' of the Pizol glacier on Sept. 22. FABRICE COFFRINI / AFP / Getty Images

Hundreds of activists gathered in the Swiss Alps on Sunday to mourn the loss of Pizol, a glacier that has steadily retreated over the last decade as temperatures have warmed the mountain tops, according to CNN.

Read More Show Less
Luis Alfonso de Alba Gongora, the UN secretary-general's special envoy for the climate summit speaks at The World Economic Forum holds the Sustainable Development Impact Summit 2018 in New York on Sept. 24, 2018. Ben Hider / World Economic Forum

By Howard LaFranchi

When United Nations Secretary-General Antonio Guterres decided to hold a high-level climate summit in conjunction with this year's General Assembly kicking off next week, he was well aware of the paradox of his initiative.

Read More Show Less
Sponsored
Acting U.S. Homeland Security Secretary Kevin McAleenan meets with Guatemalan farmers on May 29 in Santa Rosa, Guatemala. John Moore / Getty Images

The Trump administration ignored its own evidence on how climate change is impacting migration and food security when setting new policies for cutting aid to Central America, NBC reports.

Read More Show Less
Mike Pence brought the first motorcade to Mackinac Island on Saturday. Cars have been banned on the island since 1898. 13 ON YOUR SIDE / YouTube screenshot

Vice President Mike Pence sparked outrage on social media Saturday when he traveled in the first-ever motorcade to drive down the streets of Michigan's car-free Mackinac Island, HuffPost reported.

Read More Show Less
Inhaling from an electronic cigarette. 6okean / iStock / Getty Images Plus

By Shawn Radcliffe

  • As illnesses and deaths linked to vaping continue to rise, health officials urge people to stop using e-cigarettes.
  • Officials report 8 deaths have been linked to lung illnesses related to vaping.
  • Vitamin E acetate is one compound officials are investigating as a potential cause for the outbreak.
The number of vaping-related illnesses has grown to 530 cases in 38 states and 1 U.S. territory, federal health officials reported.
Read More Show Less
Sponsored
Activist Greta Thunberg leads the Youth Climate Strike on Sept. 20, 2019 in New York City. Roy Rochlin / WireImage / Getty Images

By Julia Conley

As organizers behind Friday's Global Climate Strike reported that four million children and adults attended marches and rallies all over the world — making it the biggest climate protest ever — they assured leaders who have been reticent to take bold climate action that the campaigners' work is far from over.

Read More Show Less

Summer has officially come to an end. Luckily, EcoWatch is here to keep its memory alive by sharing the winners of our "Best of Summer" photo contest.

Read More Show Less
United Nations Secretary-General Antonio Guterres speaks at a news conference at UN headquarters on Sept. 18. Drew Angerer / Getty Images

Today is the United Nations Climate Action Summit, a gathering called by UN Secretary General António Guterres to encourage climate action ahead of 2020, the year when countries are due to up their pledges under the Paris agreement.

Read More Show Less