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From UPSC perspective, the following things are important :
Prelims level: Great Pacific Garbage Patch
Mains level: Not Much
Central idea: The article reports on a recent study which found evidence that coastal life forms have colonized plastic items in the Great Pacific Garbage Patch, a vast area in the North Pacific Ocean where plastic waste has accumulated due to ocean currents.
What is the Great Pacific Garbage Patch (GPGP)?
Features | |
Location | North Pacific Subtropical Gyre (NPSG), north of the equator in the Pacific Ocean |
Currents | Kuroshio, North Pacific, California, and North Equatorial currents, moving in a clockwise direction |
Sources | Any trash that enters one of these currents from any of the 51 Pacific Rim countries |
Size | Estimated to be 1.6 million sq. km |
Age | More than 50 years old |
Plastic Content | Estimated to contain 45,000-129,000 metric tonnes of plastic, predominantly in the form of microplastics |
Visible Objects | Heavier, more visible objects that haven’t yet broken down into smaller particles accounted for 92% in 2018 |
Findings of the new study
- Researchers from Canada, the Netherlands, and the U.S. have reported that coastal life forms have colonized plastic items in the Great Pacific Garbage Patch.
- From November 2018 to January 2019, they collected 105 pieces of plastic debris, the most heavily plastic-polluted ocean gyre on the globe.
- Based on studying them, they reported that 98% of the debris items had invertebrate organisms.
Plastic inflicting into a coastal organism
- Organisms found on coasts were getting by on small floating islands of garbage out in the Pacific Ocean, which the researchers named the neopelagic community.
- They found organisms belonging to 46 taxa, and 37 of them were coastal; the rest were pelagic. Among both coastal and pelagic organisms, crustaceans were the most common.
- Nearly all taxa were of Northwest Pacific origin, including Japan.
- Eight of the remainder were from East Asia and five specifically from Japan. Four items were from North America.
- They found that 68% of the coastal taxa and 33% of the pelagic taxa reproduced asexually and that there was evidence of sexual reproduction among the hydroids and the crustaceans, among others.
Implications of the findings
- Marine plastic pollution has given rise to a new kind of standing coastal community in the open ocean.
- The neopelagic community is not misplaced but lives on plastic items in the garbage patch, including reproducing there.
- The finding recalls other studies that show the chemical bonding of plastic with rocks, sedimentary rocks embedded with plastic earrings in Brazil, and the formation of plastiglomerates in Hawaii.
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What is neopelagic community?
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GPGP and its impact on marine life
- The GPGP has significant impacts on marine life due to the ingestion of plastic by marine animals, which can cause harm and even death.
- Plastic can also entangle and suffocate marine animals, leading to the disruption of ecosystems.
- The new study sheds light on the neopelagic community, which has adapted to living on plastic in the garbage patch.
Plastic pollution and its environmental impact
- Plastic pollution is a major environmental issue that affects land and water ecosystems worldwide.
- Plastic waste can take hundreds of years to decompose, and even then, it breaks down into microplastics that can persist in the environment indefinitely.
- The presence of plastic in the environment has negative impacts on biodiversity, ecosystem function, and human health.
Conclusion
- There are various solutions to plastic pollution, including reducing the use of single-use plastics, recycling, and promoting alternative materials.
- Governments and industries can also take steps to reduce plastic waste, such as implementing policies and regulations that reduce plastic use and increase recycling.
- Individual actions, such as reducing personal plastic consumption and properly disposing of plastic waste, can also make a difference.
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