Maya Ellison
Marine animals of all kinds are affected by plastic pollution, from small finches to blue whales, and from microscopic organisms to humpback dolphins. It is estimated that plastic kills over 100,000 marine mammals every year, with 81 out of 123 marine mammal species known to have eaten or become entangled in plastic. Plastic pollution in the oceans has become a global crisis, with a direct and deadly effect on wildlife.
| Characteristics | Values |
|---|---|
| Number of marine mammals estimated to be killed by plastic annually | 100,000 |
| Number of marine mammal species known to have eaten or been entangled in plastic | 81 out of 123 |
| Number of whale, dolphin and porpoise species that have consumed plastic | 56% |
| Number of sea turtles affected by plastic | 7 out of 7 |
| Number of sea turtles worldwide that have ingested plastic | 50% |
| Number of seabird species that have eaten pieces of plastic | 60% (predicted to rise to 99% by 2050) |
| Number of seabirds killed by plastic annually | 1,000,000 |
| Marine animals affected by plastic | Creatures large and small, from seabirds, whales, dolphins, seahorses, fish, sea turtles, marine mammals, Hawaiian monk seals, Pacific loggerhead sea turtles, Steller sea lions, humpback dolphins, albatross chicks, gray whales, harbor seal pups, and more |
| Amount of plastic that reaches the ocean annually | 8-10 million tons |
| Amount of plastic in every square mile of ocean | Over 46,000 pieces |
| Amount of plastic dumped into the ocean daily | 13,000-15,000 pieces |
| Amount of plastic in the ocean by 2050 | Expected to exceed the combined weight of all the fish in the sea |
| Amount of plastic in the environment annually | 20 million metric tons |
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What You'll Learn
- Marine mammals, such as whales, seals, and dolphins, are affected by plastic pollution through ingestion and entanglement
- Seabirds mistake plastic for food, leading to fatal stomach blockages and starvation
- Sea turtles ingest plastic, causing choking, internal injuries, and starvation
- Plastic debris can entangle marine life, causing injury, vulnerability to predators, and death
- Microplastics adsorb toxins, which transfer to the fatty tissues of organisms that ingest them, impacting marine apex predators
Marine mammals, such as whales, seals, and dolphins, are affected by plastic pollution through ingestion and entanglement
Marine mammals, such as whales, seals, and dolphins, are highly affected by plastic pollution. The two primary ways in which plastic harms these creatures are ingestion and entanglement.
Whales, for instance, are not only harmed by plastic debris but are also among the species known to have ingested plastic, which can cause internal injuries and even lead to death. Sperm whales, in particular, are severely impacted by plastic debris, with one stranded whale found to have ingested 135 plastic items, the highest recorded number for this species. Furthermore, microplastics have also been detected in whales and their prey. These tiny plastic particles, measuring less than 5mm, are the most prevalent type of marine debris. Over time, they can break down into invisible toxic chemical compounds, which then move up the marine food chain, a process known as biomagnification. This can lead to the disruption of reproductive health and development in marine animals.
Dolphins and porpoises are also at serious risk from plastic pollution. They face threats such as fatal tears and blockages, illnesses, and diseases caused by ingesting plastic. Additionally, the toxins from the ingested plastic bioaccumulate in their bodies, and due to their inability to effectively detoxify these organic pollutants, their immune systems are compromised, leaving them more susceptible to diseases.
Seals are another marine mammal affected by plastic pollution. They ingest microplastics, which contain toxic chemicals, increasing their chances of developing diseases and facing reproductive issues. After consuming microplastics, seals may suffer for months or even years before eventually dying.
Large items of plastic, such as discarded fishing nets, can entangle marine mammals like whales, seals, and dolphins, leading to starvation, injury, and increased vulnerability to predators.
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Seabirds mistake plastic for food, leading to fatal stomach blockages and starvation
Marine animals, including seabirds, are severely impacted by plastic pollution in the ocean. While plastic affects all sea life, from large whales to tiny seahorses, one of the most vulnerable groups is seabirds, which often mistake plastic for food, leading to fatal stomach blockages and starvation.
Seabirds are birds that primarily live on the ocean, far away from humans. They have unique adaptations, such as specialised feathers and a desalination system, allowing them to drink seawater safely. Despite their resilience, seabirds are highly susceptible to plastic pollution. An estimated one million seabirds die from ingesting plastic every year.
The problem of plastic ingestion among seabirds has grown exponentially. In the 1960s, less than 5% of birds had plastic in their stomachs, but by the 1980s, this number had risen to over 80%. It is now projected that by 2050, a staggering 99% of seabird species will be ingesting plastic. This issue is particularly devastating for chicks. Adult seabirds may mistake plastic for prey, such as fish eggs, and feed it to their chicks, which are then unable to regurgitate it. This leads to fatal blockages and starvation.
The ingestion of plastic causes severe health issues in seabirds, including a newly identified disease called "plasticosis". Plasticosis is characterised by severe stomach damage, scarring, and a range of negative health consequences, including multiorgan failure and neurodegeneration. The presence of plastic in the stomach reduces the volume available for food, leading to malnutrition and starvation. Additionally, the plastic triggers a cascade of harmful physiological responses, including abnormal protein levels and intracellular components in the blood, indicating cell lysis and organ dysfunction.
The impact of plastic pollution on seabirds is not limited to physical harm. It also affects their reproduction and nesting behaviours. On beaches heavily polluted with plastic, sea turtles' reproduction rates are impacted as the plastic alters the temperature of the sand where incubation occurs. Similarly, plastic pollution on remote islands, such as Midway Atoll, affects the survival and nesting success of albatross and other seabird species.
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Sea turtles ingest plastic, causing choking, internal injuries, and starvation
Marine animals, including sea turtles, are severely affected by plastic pollution in the ocean. Sea turtles, in particular, face significant risks due to their interaction with plastic debris at various life stages and in different habitats. One of the primary ways plastic harms sea turtles is through ingestion, or the accidental consumption of plastic.
Sea turtles can ingest plastic in multiple ways. They may mistake plastic for their natural food, such as a plastic bag resembling a jellyfish, or accidentally eat plastic present among their natural food sources, such as crustaceans on the seafloor. Additionally, research has found that sea turtles are attracted to the smell of marine plastics, likely due to the organisms that attach themselves to the plastic debris. This attraction further increases the likelihood of ingestion.
When sea turtles ingest plastic, it can lead to severe consequences, including choking, internal injuries, and starvation. Plastic can cause physical damage to their intestines, resulting in blockages or even piercing the intestinal wall, causing internal bleeding. One of the most concerning effects is the false sensation of fullness that plastic creates in turtles. Turtles may neglect to seek out other food sources, believing they are already full, ultimately leading to starvation.
The impact of plastic ingestion is not limited to physical harm but also contributes to the decline in sea turtle populations. It has been estimated that more than half of all sea turtles have eaten plastic, and the ingestion of just 14 pieces of plastic significantly increases their risk of death. This is especially concerning for young sea turtles, as they tend to drift with ocean currents, encountering plastic pollution that puts them at higher risk of ingestion.
To address this issue, global efforts are being made to reduce plastic pollution and protect sea turtles. Individuals can contribute by reducing their consumption of single-use plastics, properly disposing of waste, and supporting organizations dedicated to sea turtle conservation and research.
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Plastic debris can entangle marine life, causing injury, vulnerability to predators, and death
Plastic pollution in the ocean is a pressing issue that affects a wide range of marine animals, from large marine mammals to small fish and invertebrates. One of the most significant ways plastic harms marine life is through entanglement, which can lead to injury, vulnerability to predators, and death.
Large plastic items, such as discarded fishing nets, ropes, and lines, can entangle marine mammals, fish, and even small crabs, preventing them from escaping and leading to starvation, injury, and increased vulnerability to predators. This plastic debris can cut deep into the skin of animals, causing open wounds and leaving them susceptible to deadly infections. For example, humpback dolphins, a rare species found only in the waters around Australia and New Guinea, have been observed with marine debris wrapped tightly around their bodies.
Sea turtles are particularly vulnerable to entanglement, with all seven species affected. Between 1997 and 2009, over 1,000 sea turtles were found stranded in Florida due to entanglement in fishing gear. Turtles can also mistake plastic bags for their staple food, jellyfish, or confuse fishing nets for seaweed, leading to ingestion and subsequent health issues.
Even small plastic fragments can be harmful. These can float on the surface of the water and be mistaken for food by seabirds and other marine species, leading to suffocation, starvation, and toxic contamination. It is estimated that plastic waste kills up to a million seabirds a year, and over 100 species of seabirds are known to ingest plastic or become entangled in it.
Microplastics, which are invisible to the naked eye, are easily consumed by wildlife and can adsorb toxins, transferring them to the fatty tissues of organisms that ingest them. These microplastics can accumulate in the environment and biomagnify up the food chain, leading to higher concentrations of toxins in apex predators such as orcas and great white sharks.
The impact of plastic pollution on marine life is widespread and devastating, and it is crucial that we address this issue to protect the diverse range of species that call our oceans home.
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Microplastics adsorb toxins, which transfer to the fatty tissues of organisms that ingest them, impacting marine apex predators
Marine animals are facing a significant threat from plastic pollution, which is causing harm in a variety of ways. One of the most concerning issues is the impact of microplastics, which are plastic particles ranging from 1 μM to 5 mm in size. These tiny particles are invisible to the naked eye, making them easy for marine organisms to inadvertently consume.
Microplastics pose a significant danger to marine life due to their ability to adsorb toxins. When organisms ingest microplastics, these toxins can transfer to their fatty tissues. This process, known as bioaccumulation, results in the buildup of toxic chemicals in the bodies of these organisms. As these contaminated organisms are consumed by predators higher up the food chain, the toxins biomagnify, leading to even higher concentrations of toxins in the fatty tissues of apex predators.
Apex predators, such as great white sharks and orcas, are particularly vulnerable to the cumulative impact of microplastics in the food chain. Studies have shown that a single plastic particle can adsorb up to one million times more toxic chemicals than the surrounding water. As a result, apex predators may ingest and accumulate large amounts of microplastics and additives, posing a significant threat to their health and the stability of marine ecosystems.
The consequences of microplastic ingestion have been observed in orcas, which have been found with high levels of chemicals in their fatty tissues and breast milk. This contamination is passed on to their young, raising concerns about the long-term impacts on their health and survival. While the full extent of the dangers is yet to be determined, the presence of microplastics in the marine food chain is a pressing issue that requires urgent attention and further research.
In addition to microplastics, larger plastic items also pose significant threats to marine life. Marine mammals, such as whales, dolphins, and seals, can become entangled in plastic debris, leading to injury, vulnerability to predators, and even death. Plastic pollution also affects sea turtles, which often mistake plastic for food, leading to starvation and increased risk of death. The ingestion of plastic by marine birds has resulted in fatal blockages and starvation, contributing to the death of up to a million seabirds annually.
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Frequently asked questions
Marine animals can ingest plastic or get entangled in it, which often leads to starvation, suffocation, drowning, or internal injuries. Plastic can also transport invasive species, threatening native wildlife.
Marine animals affected by plastic include seabirds, whales, dolphins, seals, fish, sea turtles, seahorses, humpback dolphins, Hawaiian monk seals, and Pacific loggerhead sea turtles.
It is estimated that 8 to 10 million tons of plastic enter the ocean each year, with 13,000 to 15,000 pieces of plastic dumped daily. Plastic makes up about 40% of the world's ocean surfaces.
To reduce the impact of plastic on marine animals, it is crucial to reduce plastic production and consumption, improve waste management and recycling practices, and support initiatives that protect marine environments and address plastic pollution at its source.
