Meghan Hodges
Plastic pollution in the ocean is a pressing issue that poses a significant threat to marine life. Plastic waste accounts for 80% of marine pollution, with an estimated 8 to 10 million metric tons of plastic ending up in the oceans annually. The primary sources of this pollution are littering, industrial activities, and improper waste management. Marine animals, such as seabirds, turtles, seals, and large marine mammals, are severely impacted by plastic pollution through ingestion and entanglement, leading to starvation, suffocation, and even death. The issue extends beyond the immediate harm to wildlife, as the toxic contaminants on plastics are transferred to humans through seafood consumption. With the weight of ocean plastics predicted to exceed the combined weight of all fish in the sea by 2050, addressing this crisis requires urgent global action, improved waste management, and a shift in how we produce, use, and dispose of plastic.
| Characteristics | Values |
|---|---|
| Percentage of plastic leakage in the environment in 2019 | 88% |
| Weight of plastic in the environment in 2019 | 20 million metric tons |
| Amount of plastic produced annually | 400-460 million metric tons |
| Amount of plastic in the ocean each year | 8-10 million metric tons |
| Amount of plastic in the ocean | 15-51 trillion pieces |
| Percentage of plastic recycled | 10% |
| Number of seabirds killed by plastic waste annually | 1 million |
| Percentage of seabird species that have eaten plastic | 60% |
| Percentage of sea turtles that have ingested plastic | 50% |
| Number of whale deaths caused by ghost gear entanglement annually | 300,000 |
| Number of megafaunal species impacted by plastic ingestion and entanglement | 914 |
| Number of endangered species among the impacted megafauna | 100 |
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What You'll Learn
Plastic ingestion by sea creatures
Plastic waste accounts for 80% of marine pollution, with around 8 to 10 million metric tons of plastic ending up in the ocean each year. This plastic waste is ingested by sea creatures, causing harm to their health and ecosystems.
Plastic Ingestion by Marine Fish
Plastic ingestion by marine fish is widespread and increasing. A study summarising over 100 research papers on plastic ingestion among 500 fish species found that over two-thirds had consumed plastic. Mobile predatory species had the highest likelihood of ingesting plastic. Fish often mistake small plastic pieces, such as pellets, for food. Controlled laboratory experiments have confirmed that plastic-derived compounds can transfer from plastic to fish, leading to reduced activity rates, compromised liver function, and brain damage.
Plastic Ingestion by Seabirds
Seabirds are also severely affected by plastic ingestion. They mistake small plastic fragments on the water's surface for food, leading to starvation or suffocation. A review by Kühn and van Franeker found that over 40% of seabird species studied had ingested plastic. It is estimated that plastic waste kills up to a million seabirds a year.
Plastic Ingestion by Sea Turtles
All seven species of sea turtles have been confirmed to eat marine debris, with plastic bags and sheeting resembling their jellyfish prey. Research indicates that half of sea turtles worldwide have ingested plastic, leading to starvation as their stomachs feel full. Plastic pollution on beaches also affects turtles' reproduction rates by altering the temperature of the sand where incubation occurs.
Plastic Ingestion by Marine Mammals
Marine mammals, such as whales and dolphins, are also vulnerable to plastic ingestion. In 2019, a whale was found washed up with 40 kg of plastic in its stomach, mainly plastic bags. Marine mammals can also be affected by plastic entanglement, with an estimated 300,000 whales, dolphins, and porpoises dying annually from entanglement in ghost fishing gear.
The ingestion of plastic by sea creatures has severe consequences for their health and ecosystems. It is crucial to address the problem of plastic pollution in the oceans by improving waste management systems, reducing single-use plastic consumption, and implementing effective recycling practices.
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Plastic entanglement
Plastic pollution in the ocean is a pressing issue, with plastic waste making up 80% of all marine pollution. The impact of this pollution on sea life is devastating, with thousands of marine creatures dying each year from ingesting plastic or becoming entangled in it.
Sea turtles are also vulnerable to plastic entanglement, with large leatherback sea turtles, measuring over six feet long and weighing a ton, requiring specialized techniques for their release. Smaller animals, such as dolphins, seals, sea lions, and smaller sea turtles, can be captured and have the entanglement removed by trained professionals.
The impact of plastic entanglement extends beyond the individual animals that become entangled. For example, the reproduction rates of sea turtles are affected by plastic pollution, as it alters the temperature of the sand where incubation occurs.
Addressing plastic entanglement requires a multi-faceted approach. Prevention is crucial, and this includes improving waste management systems, reducing the use of disposable packaging, and increasing the recycling of plastics. Additionally, it is essential to minimize plastic leakage into the natural environment and make plastics less toxic.
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Sources of plastic pollution
Plastic pollution in the ocean is a pressing issue that poses a threat to marine life and ecosystems. The primary sources of plastic pollution can be categorised into land-based and sea-based sources.
Land-based Sources
The majority of plastic pollution in the ocean originates from land. Rivers are a significant pathway for plastic waste to reach the ocean. Improper disposal of plastic items, such as littering, is a major contributor. This includes items like food wrappings, plastic bags, razors, and bottles, which are not properly discarded and eventually make their way into waterways and, ultimately, the ocean.
In addition to littering, plastic pollution can result from improper manufacturing processes. Microplastics, in particular, can be introduced into the environment due to inadequate manufacturing practices. Furthermore, the breakdown of larger plastic debris accumulated on beaches or coastal areas can also contribute to the presence of microplastics in the ocean.
Sea-based Sources
Fishing activities are a significant source of plastic pollution in the ocean. Abandoned, lost, or discarded fishing gear, such as nets, traps, and crates, can accumulate offshore and pose a risk to marine life. The Great Pacific Garbage Patch, located between Hawaii and California, is an area of concern, with approximately 80% of the plastic there originating from fishing activities.
Offshore activities, such as commercial fishery, navigation, waste disposal, and shellfish/fish culture, also contribute to plastic debris in marine and coastal zones. Maritime and navigation activities have been identified as sources of plastic accumulation in the sea. Marine vessels may intentionally or unintentionally release plastic litter into the ocean.
Addressing Plastic Pollution
The growing crisis of plastic pollution in the ocean has prompted calls for global action. Strategies to mitigate plastic pollution include improving waste management systems, increasing recycling, reducing the use of disposable packaging, and decreasing the production of unnecessary single-use plastics. The United Nations Environment Assembly (UNEA) has recognised the urgency of the issue, and in 2022, 175 countries adopted a resolution to work towards a legally binding international instrument to address plastic pollution throughout its entire lifecycle, from source to sea.
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Impact on human health
Plastic waste makes up 80% of all marine pollution, and around 8 to 10 million metric tons of plastic end up in the ocean each year. This plastic waste in the ocean poses a significant threat to human health in several ways.
Firstly, plastic pollution in the ocean can contaminate seafood, which is a primary source of nutrition for humans. Research indicates that half of the sea turtles worldwide have ingested plastic, and this ingested plastic can end up in the seafood we eat. A study of mussels sourced from UK waters found that 100% of the samples contained microplastic pieces. Hundreds of fish species, including those consumed by humans, have been found with traces of microplastics in their bodies. These microplastics can absorb up to one million times more toxic chemicals than the surrounding water, leading to the bioaccumulation of these toxins in the fatty tissues of marine organisms. As humans consume seafood, these toxic chemicals can be transferred to our bodies, potentially causing harm to our health.
Secondly, plastic pollution can act as a vector for pathogenic microorganisms in the ocean. Corals that come into contact with plastic have an 89% chance of contracting diseases, compared to a 4% likelihood for corals that are not exposed to plastic. This increased disease prevalence in marine organisms can have indirect impacts on human health, particularly for those who rely on seafood as a primary source of nutrition or those involved in the fishing industry.
Thirdly, the ingestion of plastic by marine organisms can lead to their starvation and death, disrupting the delicate balance of marine ecosystems. Seabirds, for example, mistake small plastic fragments on the water's surface for food, leading to their ingestion. This ingestion of plastic can cause starvation as the plastic fills their stomachs, leading to the death of up to a million seabirds annually. The disruption of marine ecosystems can have far-reaching consequences for human health, as these ecosystems provide essential resources and services that are vital for human well-being.
Lastly, plastic pollution in the ocean can release toxic chemicals into the surrounding environment. Certain chemicals used in the production of plastic materials are known to be carcinogenic. These chemicals can leach into the surrounding seawater, contaminating the marine environment and potentially impacting the health of marine organisms and humans who consume seafood.
Overall, the impact of plastic pollution in the ocean on human health is significant and multifaceted. It is crucial to address this urgent issue through improved waste management, reduced plastic usage, and the development of more sustainable alternatives to mitigate the risks posed to human health and the environment.
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Solutions to plastic pollution
Plastic waste in the ocean is a pressing issue, with marine life suffering the consequences. Fish, seabirds, turtles, and marine mammals are all affected by plastic pollution, either by becoming entangled in it or ingesting it. This plastic ingestion can cause suffocation or starvation, and it is estimated that over half of the world's sea turtles and nearly every seabird has eaten plastic in their lifetime.
To tackle this issue, a multifaceted approach is necessary, targeting the root causes and involving individuals, communities, and governments. Here are some key solutions to address plastic pollution:
Reduce Plastic Consumption and Promote Recycling
- Individuals can play a role by reducing their plastic consumption. This includes avoiding single-use plastics, such as plastic bags, straws, and disposable water bottles. Opt for reusable alternatives whenever possible.
- Governments and businesses should also work together to reduce plastic production and promote recycling. This can be achieved through legislation and initiatives that encourage the use of compostable materials, reduce the manufacturing of unnecessary single-use plastics, and improve recycling infrastructure.
Improve Waste Management
- Proper waste management is crucial to preventing plastic from entering waterways and oceans. This includes proper disposal of plastics that cannot be recycled and ensuring that recycling programs are effective and accessible.
- Individuals can also take responsibility by correctly disposing of their plastic waste and supporting initiatives that promote better waste management practices.
Reuse and Repurpose Plastics
Instead of treating plastic as a waste material, we should explore ways to reuse and repurpose it. This can involve using recycled plastic for new products or finding creative ways to upcycle single-use plastics into something useful.
Educate and Raise Awareness
Educating communities about the impact of plastic pollution and how they can be part of the solution is essential. This includes raising awareness about the issue, promoting sustainable practices, and providing information on how to reduce, reuse, and recycle plastics effectively.
Support Policy Changes and Legislation
Advocate for policy changes and legislation that address plastic pollution. Support initiatives like the Break Free From Plastic Pollution Act in the United States and the global plastics treaty enacted by the United Nations. These legislative efforts aim to hold plastic producers and distributors responsible for their products and packaging throughout their lifecycle.
By implementing these solutions and working together, we can significantly reduce plastic pollution and protect marine life from the harmful effects of plastic waste.
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Frequently asked questions
Plastic waste makes up 80% of all marine pollution. Each year, about 8 to 10 million metric tons of plastic end up in the ocean.
Plastic pollution has a direct and deadly effect on wildlife. Marine animals such as turtles, seals, crustaceans, and seabirds can choke, sustain internal injuries, and die from ingesting plastic. They can also starve by mistaking plastic for food and feeling full after eating it. Marine mammals and large marine life such as blue whales and small crabs are highly vulnerable to plastic entanglement, particularly from ghost fishing gear.
To reduce plastic pollution in the ocean, it is essential to improve waste management systems, implement recycling, and reconsider the design and usage of disposable packaging. A global plastics treaty is also needed to reduce plastic production, phase out harmful subsidies, and eliminate products and chemicals that contribute to pollution.
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