Scientists Warn of Threat of Plastic Waste on Marine Life

A huge belt of plastic photographed floating off the coast of the Caribbean island of Roatan, Honduras. (AFP)
A huge belt of plastic photographed floating off the coast of the Caribbean island of Roatan, Honduras. (AFP)
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Scientists Warn of Threat of Plastic Waste on Marine Life

A huge belt of plastic photographed floating off the coast of the Caribbean island of Roatan, Honduras. (AFP)
A huge belt of plastic photographed floating off the coast of the Caribbean island of Roatan, Honduras. (AFP)

Scientists are warning that micro-plastics in the ocean and the toxic chemicals in them are posing a significant risk to giant animals like whales, sharks and manta rays that are marine filter feeders.

A new study published in the Trends in Ecology and Evolution journal said that such animals swallow thousands of cubic meters of seawater daily in an effort to capture plankton, in which case they can ingest micro-plastics directly from polluted water or indirectly through contaminated prey, the German News Agency (dpa) reported.

Micro-plastics are small plastic pieces less than five millimeters long, which are harmful to marine life.

The study added that plastic-associated chemicals and pollutants can accumulate over decades and alter biological processes in the animals, leading to altered growth, development and reproduction, including reduced fertility.

Elitza Germanov, lead researcher of the study, said: “While a definitive connection between micro-plastic ingestion and toxin exposure for filter feeders remains to be confirmed, studies into seabirds and small fish have found a link.”

The marine species are also in danger due to their habitat areas overlapping micro-plastic pollution hotspots like the Gulf of Mexico, the Mediterranean Sea, the Bay of Bengal and the Coral Triangle (an area from Malaysia to the Solomon Islands in the Pacific).

Many of the animals, like manta rays, are threatened species, so it is difficult to assess plastic concentrations via conventional methods, such as stomach analysis, Germanov said.

The study’s lead author explained: “So we are using the non-lethal sampling of small amounts of tissue, which we are testing for chemical tracers using sophisticated and sensitive analytical tools.”

Many of the filter-feeding animals live a long life, but have few offspring throughout their lives.

Maria Cristina Fossi, a co-author of the study, said another study she led on whale sharks in the Gulf of California and on fin whales in the Mediterranean Sea confirmed exposure to toxic chemicals.

“As these areas are hotspots for micro-plastics, our results could indicate that filter feeders are taking up micro-plastics in their feeding grounds,” she said.

Lately, there has been a large number of reports and studies on marine life facing an existential threat from the millions of tons of plastic waste that end up in the oceans each year.



Smoke From Canadian Fires Reaches Europe, Says EU Climate Monitor

 This photo provided by the Manitoba government shows wildfires in Flin Flon, Manitoba, Canada on Tuesday, May 27, 2025. (Manitoba government via AP)
This photo provided by the Manitoba government shows wildfires in Flin Flon, Manitoba, Canada on Tuesday, May 27, 2025. (Manitoba government via AP)
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Smoke From Canadian Fires Reaches Europe, Says EU Climate Monitor

 This photo provided by the Manitoba government shows wildfires in Flin Flon, Manitoba, Canada on Tuesday, May 27, 2025. (Manitoba government via AP)
This photo provided by the Manitoba government shows wildfires in Flin Flon, Manitoba, Canada on Tuesday, May 27, 2025. (Manitoba government via AP)

Heavy smoke from intense wildfires in Canada has reached northwestern Europe, the European Union's climate monitoring service said on Tuesday.

The huge plumes are at very high altitude and do not pose an immediate health risk, it said in a statement.

"Smoke originating from the wildfires in the Canadian provinces of Manitoba and Saskatchewan has been transported across the Atlantic," the Copernicus Atmosphere Monitoring Service (CAMS) said.

Satellites tracked the smoke in mid-May, with some plumes reaching as far east as Greece and the eastern Mediterranean.

"A second, much larger, smoke plume crossed the Atlantic during the last week of May, reaching northwestern parts of Europe on June 1," CAMS said.

Additional plumes are expected to shade the continent in the coming days.

Wildfire smoke is comprised of gaseous pollutants such as carbon monoxide, along with water vapor and particle pollution, which can be particularly hazardous to health.

A high concentration of carbon monoxide is expected to pass over northwestern France, including the Paris Basin, on Tuesday.

The high-altitude smoke headed for Europe is not expected to have a significant impact on surface air quality, but is likely to result in hazy skies and reddish-orange sunsets.

Manitoba in central Canada is experiencing its worst start to the fire season in years due to drought, and Saskatchewan to the west declared a state of emergency at the end of May, evacuating thousands of residents.

"Central regions of Canada have experienced a very intense few weeks in terms of wildfire emissions," said Mark Parrington, scientific director at CAMS.

Canadian authorities have forecast a more intense fire season than usual this summer in central and western Canada, due in particular to severe or extreme drought.

Elsewhere, extensive forest fires have been raging in Russia's Far Eastern Federal District since early April, particularly east of Lake Baikal, generating carbon emissions of around 35 million tons, Copernicus reported.