Chloe Zhang
Plastic waste in the ocean is one of the most alarming events in human history. The plastic we use daily, half of which is single-use, ends up in the ocean, wreaking havoc underwater and killing or crippling marine animals. A study by the World Wildlife Fund estimated that at least 100,000 marine animals die from plastic pollution every year, although this number is likely an underestimate. Sea turtles, for example, often mistake plastic bags for jellyfish and eat them, leading to fatal blockages. Similarly, plastic fishing nets and other debris can entangle marine animals, leading to suffocation or drowning. The impact of plastic pollution on marine life is devastating, and it is essential to address this global crisis.
| Characteristics | Values |
|---|---|
| Number of marine animals that die from plastic pollution every year | At least 100,000 according to a study by the World Wildlife Fund. Other estimates put the number at over 1 million. |
| Number of sea turtles that die every year from plastic waste | At least 1,000 |
| Impact on marine mammals | Whales, dolphins, and seals are vulnerable to entanglement in plastic debris, which can lead to injuries, suffocation, or drowning. |
| Impact on seabirds | Seabirds are the most affected by plastic pollution, with an estimated 100,000 deaths each year. |
| Impact on coral reefs | Plastic pollution damages coral reefs, causing disease and bleaching, which in turn affects the fish and other marine animals that rely on the coral reef as their habitat. |
| Sources of ocean plastic | A recent study found that nearly 50% of ocean plastics come from takeout, with a higher proportion in lower-income countries. Lost fishing gear, also known as ghost gear, accounts for about 20% of all marine plastic. |
| Global extent of plastic pollution | Plastic pollution has reached every corner of the planet, including remote areas like the Arctic. Not one square mile of surface ocean is free of plastic pollution. |
| Durability of plastic | Plastic can persist in the environment for hundreds to thousands of years, breaking down into microplastics and nanoplastics that can enter the food chain. |
| Volume of plastic waste in oceans | There is an estimated 75 to 199 million tons of plastic waste currently in the oceans, with 33 billion pounds of plastic entering the marine environment every year. |
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What You'll Learn
- Plastic bags are mistaken for jellyfish and eaten by sea turtles
- Abandoned fishing nets and lines entangle and drown dolphins, whales, and sea lions
- Toxins on plastics cause inflammation and suffering in marine animals
- Plastic waste is ingested by tiny marine creatures, entering the food chain
- Plastic pollution damages coral reefs, causing disease and bleaching
Plastic bags are mistaken for jellyfish and eaten by sea turtles
Plastic pollution in the ocean is one of the most alarming events in human history. Marine animals are suffering from the staggering amount of plastic waste produced globally. A recent study found that nearly 50% of ocean plastics come from takeout, with a higher proportion in lower-income countries.
Sea turtles are particularly vulnerable to plastic pollution. They often mistake plastic bags for jellyfish, their favourite food. As they do not have opposable thumbs, once ingested, the plastic blocks their digestive systems, leading to starvation and death. The accumulation of plastic in their stomachs can also cause malnutrition. Research suggests that 52% of the world's turtles have eaten plastic waste. This number is likely an underestimate, as it only accounts for a few species.
The impact of plastic pollution on sea turtles is devastating. Not only do they ingest plastic, but they also get entangled in abandoned fishing nets, leading to injuries or drowning. Baby turtles are among the most at risk from plastic entanglement, as they have to crawl through collected debris to reach the ocean.
The problem is that sea turtles do not know what plastic is, and they cannot choose to avoid it. They are also unable to distinguish between plastic bags and their natural prey, jellyfish. This confusion arises as their multi-million-year-old sonar system has not had time to adjust to the century-old concept of plastic.
The outlook for turtles that eat plastic is bleak. Even if they survive ingestion, consuming plastic can make them unnaturally buoyant, stunting their growth and leading to slow reproduction rates. Additionally, the toxins in plastic bags can contaminate their reproductive systems and harm their health.
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Abandoned fishing nets and lines entangle and drown dolphins, whales, and sea lions
Marine animals, including dolphins, whales, and sea lions, are at risk of entanglement and drowning due to abandoned fishing nets and lines. This issue, known as "ghost gear," poses a significant threat to marine life, and the impact of plastic pollution extends beyond the deaths it causes.
Fishing nets and lines that are left drifting in the open ocean can entangle a diverse range of marine creatures. Dolphins, whales, and sea lions are among the most vulnerable species. When these animals become entangled, they may drown or starve as the gear restricts their movement. The gear can also cause physical injuries and infections, further endangering their lives.
The problem of abandoned fishing gear is not limited to a specific region but is a global concern. In the waters around the UK, for instance, whales and dolphins frequently become entangled in fishing nets. Minke whales, humpbacks, and basking sharks are particularly at risk. The issue is not confined to the UK, as a paper published in 2012 examined 1,762 cases of dead or injured whales in the northwest Atlantic Ocean between 1970 and 2009, with entanglement being the primary cause of death.
The impact of abandoned fishing gear extends beyond the direct harm it causes to individual animals. It can also affect entire ecosystems. For example, coral reefs can be damaged by plastic pollution, which, in turn, affects the fish and other marine life that depend on these reefs as their habitat. Additionally, the presence of derelict gear in the water can be costly for fishermen, as larger whales may break free from the ropes, resulting in significant financial losses for fishing equipment and catch.
Efforts are being made to address the issue of abandoned fishing gear and mitigate its impact on marine life. Rescue and response organizations, such as NOAA Fisheries, work to prevent entanglements and rescue entangled animals. The Scottish Creel Fishermen's Federation and the Hebridean Whale and Dolphin Trust are also actively involved in monitoring and providing data to policymakers to protect cetaceans and other marine life.
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Toxins on plastics cause inflammation and suffering in marine animals
Marine animals are facing a grave threat from the plastic waste that ends up in their habitats. The plastic waste in oceans, which amounts to millions of tons, is wreaking havoc on marine life, killing and crippling marine animals. While the exact number of marine animals that die from plastic pollution is challenging to determine, estimates place the figure at a minimum of 100,000 marine animals perishing from plastic pollution annually. This number is likely an underestimate, and the true extent of plastic pollution's impact on marine life remains unknown.
Plastic waste in oceans comes from various sources, including takeout, agricultural runoff, chemical waste, and general waste from cities and towns. Rivers eventually drain into the sea, carrying plastic waste along with them. Even remote areas like the Arctic are not spared from plastic pollution. Marine animals encounter this plastic waste through ingestion or entanglement, both of which have devastating consequences.
Ingestion of plastic occurs when marine animals mistake plastic for food. Sea turtles, for example, often consume plastic bags, mistaking them for jellyfish. As plastic is indigestible, it accumulates in the digestive tract, leading to malnutrition and fatal blockages. Additionally, ingesting plastic can cause inflammation of abdominal tissues, as seen in the case of a juvenile sperm whale that died with almost 30 kilograms of plastic in its digestive tract.
Entanglement in plastic waste, such as discarded fishing nets and ropes, can ensnare marine animals, leading to injuries, drowning, and suffocation. It can also cause limb loss and make animals more vulnerable to predators. Even if they manage to move while entangled, their chances of survival are slim.
Furthermore, plastic pollution contributes to chemical contamination, with microplastics adsorbing toxins that can transfer to the fatty tissues of organisms that ingest them. These toxins can accumulate in the food chain, resulting in higher concentrations in apex predators such as orcas, which have been found with significant deposits of chemicals in their fatty tissues and breast milk.
The impact of plastic pollution on marine animals is not limited to physical harm but also extends to entire ecosystems. Coral reefs, for instance, are damaged by plastic pollution, which, in turn, affects the fish and other marine animals that rely on these reefs as their habitat.
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Plastic waste is ingested by tiny marine creatures, entering the food chain
Plastic waste is one of the most alarming events in human history. Plastic production has skyrocketed, and plastic waste has found its way into every corner of the planet, wreaking havoc on the natural environment. The oceans, in particular, bear the brunt of this pollution, with an estimated 10 million tons of plastic waste dumped into them annually.
This waste includes large, visible items and smaller particles known as microplastics, which are almost invisible to the naked eye. These microplastics are formed by the breakdown of larger plastic items through natural processes like the action of the sea, sun, and wind. They can also be synthetic textiles, such as polyester and nylon, shed from clothing during washing, and even ingredients in cosmetics like facial scrubs and toothpaste. These tiny particles are then ingested by marine creatures, entering the food chain, and posing a significant threat to marine life and, ultimately, human health.
Zooplankton, for example, are tiny marine organisms that feed on phytoplankton. Studies have shown that these zooplankton ingest plastic particles, which can either pass through their digestive tracts or remain in their bodies, leaching toxic chemicals. These toxins can have detrimental effects on the creatures that consume the zooplankton, such as baby salmon in coastal British Columbia, which are estimated to ingest up to seven microplastic particles per day.
As we move up the food chain, the concentration of toxins increases. Filter feeders like oysters, scallops, and mussels ingest microplastics along with their food, and these pollutants can accumulate in their bodies. When larger predators, such as seals, sharks, and dolphins, consume these smaller fish, they also ingest the accumulated toxins. This process, known as bioaccumulation, results in higher concentrations of toxic chemicals in apex predators like great white sharks and orcas, posing a significant threat to their health and the health of their offspring.
Additionally, plastic waste in the oceans often resembles food sources for marine creatures. Sea turtles, for instance, frequently mistake plastic bags for jellyfish, their favourite food. Once ingested, the plastic blocks their digestive systems, leading to malnutrition and, ultimately, death. This ingestion of plastic and the resulting health complications contribute to the estimated 100,000 marine animal deaths from plastic pollution each year.
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Plastic pollution damages coral reefs, causing disease and bleaching
Plastic pollution is one of the most alarming events in human history, with millions of tons of plastic waste entering the oceans annually. Marine animals are dying as a result, and coral reefs are also suffering. A four-year study found that plastic pollution is killing coral reefs from Thailand to Australia.
Coral reefs are biologically diverse and valuable ecosystems. They are already susceptible to disease due to unusually warm waters, either from seasonal shifts or human-caused global warming. Bleached coral, which loses its coloration due to increased water temperatures, is more susceptible to disease. Plastic pollution damages coral reefs, causing disease and bleaching, and threatening the entire ecosystem.
The likelihood of disease in corals increases from 4% to 89% when they come into contact with plastic, according to a study published in the journal Science. Plastic can abrade and tear open the skin of corals, leaving them vulnerable to infection. It can also block sunlight from reaching the coral, and introduce toxic substances, including metals, organic chemicals, and pesticides, which can affect coral reproduction, growth, and defensive responses.
Additionally, plastic waste can snag on corals, causing physical damage. A survey of 150 reefs found plastic pollution to be a common issue. Researchers estimate that over 11 billion plastic items could be entangled in coral reefs in the Asia-Pacific region, which is home to over half of the world's coral reefs. This plastic pollution affects the fish and other marine animals that rely on the coral reef as their habitat.
The impact of plastic pollution on marine life is devastating and far-reaching. It is important to address our plastic reliance and work towards reducing plastic waste to protect coral reefs and the marine life that depends on them.
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Frequently asked questions
It is hard to know the exact number of marine animals that die from plastic pollution each year. However, according to the World Wildlife Fund, at least 100,000 marine animals die from plastic pollution annually. This number is likely an underestimate, as it only accounts for a few species.
Plastic waste kills fish in several ways. One of the most common ways is through ingestion. Sea turtles, for example, often mistake plastic bags for jellyfish and eat them. Once ingested, the plastic blocks their digestive systems, leading to starvation.
Plastic fishing nets and other debris can entangle marine animals, leading to suffocation or drowning. Entanglement can also cause severe injuries, which may become infected and, in some cases, prove fatal.
Plastic pollution has become a global crisis, with a direct and deadly effect on wildlife. Various organizations are working to stop plastic pollution at its source, petitioning environmental agencies to regulate plastics as pollutants. California has introduced a law that makes the producers and vendors of plastic packaging responsible for waste, curbing the amount that pollutes the oceans.
