Alexei Volkov
Plastic in water is a severe threat to marine life, affecting the health and well-being of marine creatures. Marine mammals, birds, and other creatures are indiscriminately killed by plastic pollution. It is estimated that plastic pollution kills 100,000 marine mammals every year. Large items of plastic can entangle marine mammals and fish, leading to starvation, injury, and vulnerability to predators. Small plastic fragments can be mistaken for food by seabirds and other marine species, leading to suffocation, starvation, and toxic contamination. Microplastics, which are invisible to the naked eye, can be easily consumed by wildlife and have the ability to adsorb toxins, transferring them to the fatty tissues of organisms that ingest them. Humans are also impacted by this threat, as plastic enters the food chain through the consumption of affected fish.
| Characteristics | Values |
|---|---|
| Marine animals killed by plastic pollution | 100,000 marine mammals per year |
| Marine mammals affected by plastic | 81 out of 123 species |
| Marine mammals entangled in plastic | 56% of whale, dolphin and porpoise species |
| Marine mammals ingesting plastic | 64% of whale, dolphin and porpoise species |
| Plastic in the ocean | 8 million tons per year |
| Plastic as a percentage of marine debris | 80% |
| Plastic in the ocean by weight | 269,000 tons |
| Marine debris as a cause of death for marine creatures | Entanglement, ingestion, starvation, suffocation, intestinal injury, toxic contamination |
| Marine animals affected by plastic | Fish, seabirds, whales, dolphins, seals, turtles, sharks, coral, seahorses |
| Human impact of plastic in the ocean | Plastic has entered the human food chain |
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What You'll Learn
- Plastic ingestion leads to suffocation and starvation in creatures
- Plastic entanglement restricts movement, leading to injury and death
- Microplastics are consumed by marine life, entering the human food chain
- Plastic waste encourages the growth of pathogens in the ocean
- Plastic pollution affects the reproductive systems of some species
Plastic ingestion leads to suffocation and starvation in creatures
Marine animals often mistake plastic for food or swallow it while swimming or feeding. The ingestion of plastic can lead to suffocation and starvation in creatures in several ways.
Firstly, plastic can obstruct digestion and lacerate the intestines. It can also get stuck in the digestive system, making creatures feel full and reducing their appetite, which can lead to malnutrition and starvation. This was observed in the case of a pygmy sperm whale that died with just one plastic bag in its stomach.
Secondly, plastic can release chemicals that the animal then ingests. These chemicals can then enter the fatty tissues of the animal, causing toxic contamination. Seabirds are particularly vulnerable to this, as they are unable to regurgitate plastic. Northern fulmars, for instance, are known to ingest plastic pellets, and the species is now monitored as an indicator of pellet pollution levels in the North Sea.
Thirdly, plastic can entangle creatures, making them more vulnerable to predators and causing injuries that lead to infections. This entanglement can also cause creatures to drown.
Finally, plastic can affect creatures at all life stages, from recently hatched sea turtles to seal mothers with nursing pups. It is estimated that plastic pollution kills 100,000 marine mammals every year, and up to a million seabirds.
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Plastic entanglement restricts movement, leading to injury and death
Marine animals such as whales, dolphins, seals, sea lions, and sea turtles become entangled in plastic waste, fishing gear, and other marine debris as they swim or while on the beach. Large items of plastic can capture and restrict the movement of marine mammals and fish, leading to starvation, injury, and vulnerability to predators. Discarded fishing nets can also smother and break coral reefs, preventing their healthy growth.
Fishing ropes, nets, and pots that have been discarded or abandoned at sea are often made from plastic and can trap a variety of marine life. These entangled masses can retain the ability to capture target fish and other species for extended periods, leading to \"ghost fishing\" and resulting in mortality and catch losses.
Marine mammals are highly vulnerable to plastic entanglement, which can cause wounds, skin lesions, and sores. The restricted movement can also lead to drowning, as entangled animals may be unable to escape the water or avoid vessels. The entanglement may also cut into their flesh, causing physical trauma and infections.
Endangered wildlife, such as Hawaiian monk seals and Pacific loggerhead sea turtles, are among the nearly 700 species that encounter plastic litter. It is estimated that marine plastics contribute to the death of more than 100,000 marine mammals annually, with thousands of seabirds and sea turtles, seals, and other marine mammals also perishing from ingestion or entanglement.
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Microplastics are consumed by marine life, entering the human food chain
Plastic is devastating to nature. Natural ecosystems are reliant on cycles of renewal, where plants and animals grow, die, and become food for the next generation. However, plastic, which does not degrade, has infiltrated every corner of the natural world, from the Mariana Trench to Mount Everest.
The ocean is particularly vulnerable to plastic waste. Waves and storms carry plastics across the ocean, where they accumulate in gyres or become embedded in shorelines and coastal ecosystems. Over time, plastic breaks down into smaller and smaller pieces, eventually reaching microscopic sizes. These microplastics are easily ingested by marine life and can adversely affect their health. They can also absorb and carry toxins, which can transfer to the fatty tissues of the organisms that ingest them.
Marine organisms that consume microplastics include fish, seabirds, sea turtles, and marine mammals. For example, research indicates that half of the sea turtles worldwide have ingested plastic, leading to increased starvation and death rates. Similarly, plastic waste has been found in the habitat of critically endangered Hawaiian monk seals, contributing to injury and mortality in this vulnerable species.
Through the consumption of contaminated marine life, microplastics enter the human food chain. They have been detected in seafood, plant and animal origin foods, drinks, and food additives. For instance, microplastics have been found in fruit and vegetables sold by supermarkets and local sellers. Apples were the most contaminated fruit, and carrots had the highest levels among the sampled vegetables. In addition to food, microplastics can enter the human body through inhalation and skin contact with personal care products, dust, and textiles.
The health effects of microplastics on humans are still being studied, but they are considered potentially harmful. Microplastics can induce cellular toxicity and produce adverse effects on multiple organs and systems, including the digestive, respiratory, nervous, reproductive, and cardiovascular systems. They may also release additive chemicals and act as vectors for harmful microorganisms.
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Plastic waste encourages the growth of pathogens in the ocean
Plastic waste in the ocean has become a pressing environmental issue, with plastic pollution affecting marine ecosystems and the people who depend on them. One of the ways plastic waste impacts the ocean is by encouraging the growth of pathogens.
Corals, for instance, are highly susceptible to disease when they come into contact with plastic. According to a recent study, corals in contact with plastic have an 89% chance of contracting a disease, compared to a 4% likelihood for corals that are not exposed to plastic. This makes corals particularly vulnerable to the negative effects of plastic pollution.
Plastic waste provides a surface for pathogens to attach and grow, increasing the risk of disease transmission to marine organisms. The presence of plastic waste can alter the marine environment, creating favourable conditions for certain pathogens to thrive. This can lead to an increase in the prevalence of diseases among marine creatures, further exacerbating the impact of plastic pollution on their health and survival.
In addition to encouraging pathogen growth, plastic waste in the ocean poses other significant threats to marine life. Marine mammals, such as whales, dolphins, and seals, can ingest plastic or become entangled in it, leading to injuries, suffocation, and even death. Smaller creatures, like seabirds and sea turtles, are also at risk of ingesting plastic, mistaking it for food, which can cause starvation and intestinal blockages.
The impact of plastic waste extends beyond individual organisms, as it accumulates in the ocean and breaks down into microplastics. These microplastics can be ingested by marine life, transferring toxic chemicals and contaminants up the food chain, affecting the health of larger creatures and even reaching humans through seafood consumption. The durability of plastic means that every piece of plastic ever created still exists, with plastic waste expected to outweigh all the fish in the sea by 2050 if current trends continue.
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Plastic pollution affects the reproductive systems of some species
Plastic pollution is a pressing environmental issue that poses a grave threat to marine life. Plastic waste in the ocean affects creatures both large and small, from whales and dolphins to tiny seahorses and microscopic plankton. One of the most significant ways plastic harms marine life is by ingestion.
Plastic waste in the ocean can be mistaken for food by marine species, leading to serious health issues. When ingested, plastic can block the digestive tract, causing starvation. It can also release harmful chemicals into the animal's tissues, resulting in organ damage, reduced growth, and reproductive problems. Microplastics, in particular, can accumulate in the tissues of animals, potentially affecting their health and development. These tiny plastic particles can absorb toxins from the surrounding environment, which then transfer to the fatty tissues of organisms that ingest them. This process, known as bioaccumulation, can lead to toxic contamination and have unknown long-term impacts on wildlife.
Research has shown that plastic pollution is affecting the reproduction rates of sea turtles by altering the temperatures of the sand where incubation occurs. Additionally, species such as oysters have been found to produce fewer eggs after exposure to plastic pollution.
Furthermore, plastic pollution can impact the reproductive systems of species that rely on seawater for reproduction. For example, corals that come into contact with plastic have an 89% chance of contracting diseases, which can affect their reproductive capabilities.
The impact of plastic pollution on the reproductive systems of marine species highlights the urgent need to address this global crisis. Reducing plastic consumption, improving waste management practices, and developing biodegradable alternatives are crucial steps in mitigating the harmful effects of plastic on marine life and their reproductive systems.
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Frequently asked questions
Plastic in water affects marine animals in a variety of ways, from entanglement and injury to ingestion and toxic contamination. Large items of plastic can entangle marine mammals and fish, leading to starvation, injury, and vulnerability to predators. Small plastic fragments can be mistaken for food by seabirds and other marine species, leading to suffocation, starvation, and toxic contamination.
Plastic pollution has been shown to affect a wide range of marine species, including whales, dolphins, seals, sea turtles, seabirds, and fish. For example, whales and sea turtles often mistake plastic debris for food, leading to intestinal injury and starvation. Seabirds ingest small plastic fragments, causing suffocation and starvation. Plastic debris has also been found in the habitats of critically endangered species such as Hawaiian monk seals.
It is estimated that up to 13 million tons of plastic waste enter the ocean each year, threatening marine ecosystems and the people who depend on them. Plastic has been found in all the world's oceans, from the Arctic ice sheets to the seafloor. Not a single square mile of surface ocean is free from plastic pollution.
Reducing the use of single-use plastics and promoting recycling are crucial steps in mitigating the impact of plastic on marine life. Organizations such as the Center for Biological Diversity and WWF are advocating for the regulation of plastics as a pollutant and working to stop plastic pollution at its source. Individuals can also play a role by reducing their plastic consumption, recycling, and participating in beach clean-up initiatives.
