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.



Power Failures Cause Disruption on London Tube

 People walk at Waterloo station, after Transport for London (TfL) reported a power failure across the London Underground, London Overground and the Elizabeth line, in London, Britain, May 12, 2025. (Reuters)
People walk at Waterloo station, after Transport for London (TfL) reported a power failure across the London Underground, London Overground and the Elizabeth line, in London, Britain, May 12, 2025. (Reuters)
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Power Failures Cause Disruption on London Tube

 People walk at Waterloo station, after Transport for London (TfL) reported a power failure across the London Underground, London Overground and the Elizabeth line, in London, Britain, May 12, 2025. (Reuters)
People walk at Waterloo station, after Transport for London (TfL) reported a power failure across the London Underground, London Overground and the Elizabeth line, in London, Britain, May 12, 2025. (Reuters)

Power failures caused delays and disruption on London's Tube network on Monday, as several of its busiest lines were suspended.

The Bakerloo line was completely suspended as of 1715 local time (1615 GMT), while other services including the Jubilee, Elizabeth and Piccadilly lines were facing severe or minor delays following a power outage more than two hours earlier.

Transport for London (TfL) said it was working to get the whole network back to normal service as quickly as possible.

"Due to a brief interruption of the power supply to our network, several lines lost power for a short period earlier this afternoon," TfL Chief Operating Officer Claire Mann said in a statement.

Britain's National Grid confirmed that a fault on its transmission network had caused a power failure.

"The fault was resolved within seconds and did not interrupt supply from our network, but a consequent voltage dip may have briefly affected power supplies on the low voltage distribution network in the area," a spokesperson said.

The incident also caused a small contained fire which was brought under control, National Grid said.

The potential for power failures to cause major disruption came into sharp focus in March when London's Heathrow Airport was forced to shut for 18 hours due to a fire at a nearby electrical substation, stranding hundreds of thousands of air travelers.

Transport trade union TSSA called for an inquiry into the incident to ensure a similar power outage does not happen again.

"Safety for all is key at this moment, but in due course we will need a proper inquiry into what happened and the lessons to be learned," TSSA General Secretary Maryam Eslamdoust said.