Ethan Clarke
Plastic pollution is a global crisis that has a devastating impact on wildlife. Marine and land animals are affected by the ingestion of plastic, entanglement, habitat degradation, and chemical contamination. Plastic debris does not decompose but breaks down into tiny plastic particles known as microplastics, which are often ingested by animals. These microplastics can cause liver and cell damage and disrupt reproductive systems. They can also accumulate toxins, posing additional health risks to animals that consume them. The presence of microplastics in soil leads to a decrease in species that live below the surface, such as mites, larvae, and other tiny creatures, resulting in less fertile soil. With plastic production projected to increase, the impact on wildlife is expected to worsen, highlighting the urgent need for global solutions to address this crisis.
| Characteristics | Values |
|---|---|
| Marine animals that ingest plastic | Sea turtles, whales, dolphins, seahorses, sharks, seabirds, fish, seals, marine mammals, invertebrates, oysters, larval fish, Hawaiian monk seals, Steller sea lions, baleen whales, mussels, sea cucumbers, invertebrates, earthworms |
| Marine animals that get entangled in plastic | Sea turtles, seals, seabirds, Hawaiian monk seals, Steller sea lions |
| Terrestrial animals that ingest plastic | Mites, larvae, finches, worms |
| Terrestrial animals that get entangled in plastic | None found |
| Effects of ingesting plastic | Blocked digestive tracts, pierced internal organs, choking, starvation, intestinal injury, infections, liver and cell damage, disrupted endocrine systems, reproductive issues, weakened immune systems, long-term health problems, malnutrition, death |
| Effects of entanglement in plastic | Injury, amputation, slow and painful death, disrupted movement, hunting and feeding abilities |
| Effects of plastic on the environment | Degraded habitats, smothered coral reefs, disrupted growth and weakened ecosystems, increased growth of pathogens, contaminated groundwater, decreased fertility of soil and land |
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What You'll Learn
- Plastic ingestion blocks digestive tracts, pierces internal organs, and causes starvation
- Animals get trapped in plastic, causing injury, amputation, and death
- Microplastics in the soil affect earthworm fitness and soil condition
- Microplastics in water are ingested by animals, causing liver and cell damage and reproductive issues
- Plastic waste affects coral reefs, encouraging the growth of pathogens
Plastic ingestion blocks digestive tracts, pierces internal organs, and causes starvation
Plastic pollution is a global crisis that affects all wildlife, including those in the ocean and on land. Marine creatures such as sea turtles, whales, and seabirds are among the nearly 800 species worldwide that ingest or get caught in plastic litter. This plastic debris can cause severe damage to their health and well-being, including blocking their digestive tracts, piercing their internal organs, and leading to starvation.
Sea turtles, for example, often mistake floating plastic garbage for food. When ingested, plastic can block their digestive systems, leading to malnutrition and starvation. It can also cause internal injuries and even death. Research indicates that half of the sea turtles worldwide have ingested plastic, and a recent study found that sea turtles that ingest just 14 pieces of plastic have an increased risk of death.
Whales, another victim of plastic pollution, have been found with bellies full of plastic, which can lead to intestinal injury and death. Additionally, plastic can transfer up the food chain, affecting larger marine mammals and even human seafood eaters. Fish in the North Pacific ingest 12,000 to 24,000 tons of plastic each year, and a quarter of fish at markets in California contained plastic in their guts, mainly in the form of plastic microfibers.
Plastic ingestion also affects seabirds, with thousands dying each year from ingesting plastic or getting entangled in it. They, too, mistake plastic for food, and the ingested plastic takes up space in their stomachs, leading to starvation. The accumulation of plastic on beaches has also affected the reproduction rates of turtles by altering the temperature of the sand where incubation occurs.
Beyond the immediate impact on wildlife, plastic pollution has far-reaching consequences. As plastic breaks down into microplastics, they can pass through the digestive systems of animals and be expelled without consequence. However, these microplastics have been found in hundreds of species, including sea turtles, seabirds, and marine mammals. Tests have confirmed that microplastics can cause liver and cell damage, disrupt reproductive systems, and affect the hormone systems of vertebrates and invertebrates.
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Animals get trapped in plastic, causing injury, amputation, and death
Plastic pollution is a pressing issue that affects wildlife in marine and terrestrial ecosystems. One of the most disturbing consequences is the entanglement of animals in plastic debris, which can lead to severe injuries, amputations, and even death.
Sea turtles, seals, and seabirds are among the most vulnerable species to plastic entanglement. Discarded fishing nets, plastic ropes, and packaging materials pose significant risks to these animals, impairing their ability to move, hunt, and feed. The physical entanglement can cause injuries, restrict blood flow, and make it difficult for them to escape from predators or access food sources.
For example, endangered Steller sea lions have suffered injuries and mortality due to entanglement in packing bands. Plastic debris can also entrap animals, leading to slow and painful deaths. Endangered Hawaiian monk seals, critical habitats for pup nurseries, are at risk due to the large amounts of plastic debris in their environment.
The impact of plastic entanglement extends beyond physical harm. It disrupts the overall survival and reproductive success of affected animals. Additionally, plastic pollution contributes to habitat degradation, smothering coral reefs and preventing them from receiving essential sunlight, which weakens the entire ecosystem dependent on these reefs.
The pervasiveness of plastic pollution on beaches and in the ocean poses a significant threat to wildlife. Animals, including turtles, can mistake plastic for food, leading to intestinal injuries, blockages, and even death. The ingestion of plastic can also induce a false sense of fullness, resulting in starvation as the animal feels satiated without receiving adequate nutrition.
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Microplastics in the soil affect earthworm fitness and soil condition
Plastic pollution has become a global crisis, impacting wildlife in oceans and on land. Marine animals ingest plastic or get entangled in it, leading to injury and mortality. Microplastics, plastic particles smaller than 5mm, are of particular concern as they can pass through animals' digestive systems, causing liver and cell damage and disrupting reproductive systems.
On land, microplastics in the soil affect earthworm fitness and soil condition. Earthworms are soil ecosystem engineers, and their presence increases the transport of microplastic particles to deeper soil layers. Studies have shown that earthworms exposed to microplastics at certain concentrations experience increased mortality and decreased biomass. In addition, when the content of microplastics in soil exceeds 0.1%, earthworm growth is affected, and oxidative stress is induced, resulting in neural and DNA damage.
The type, size, and shape of microplastics also influence their toxic effects on earthworms. Polyethylene and polystyrene, two of the most common plastic types, have been the focus of many studies investigating the impact of microplastics on earthworms. Furthermore, microplastics can alter soil pH, nutrient availability, and microbial activity, which subsequently impacts plant performance and soil biota.
The presence of microplastics in the soil is a serious environmental concern. It not only affects earthworms but also other soil-dwelling organisms and plants, ultimately leading to a decline in soil fertility and health.
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Microplastics in water are ingested by animals, causing liver and cell damage and reproductive issues
Plastic pollution is a global crisis that impacts all wildlife, including those in the ocean and on land. Marine animals are particularly vulnerable to ingesting plastic, mistaking it for food. Plastic debris breaks down into tiny particles known as microplastics, which are then consumed by marine life. Microplastics in water are ingested by animals, causing liver and cell damage and reproductive issues.
Microplastics are found in the water, air, soil, and various living organisms worldwide, including marine mammals, birds, fish, and invertebrates. They are ingested by animals through direct consumption or by eating prey that has already ingested plastic. Invertebrates, or animals without a backbone, ingest microscopic plastic pieces and contribute to the breakdown of plastic marine debris.
The ingestion of microplastics has been shown to cause liver and cell damage in animals. For example, studies on fish have revealed structural damage to the liver, as well as oxidative stress and inflammation. Invertebrates such as mussels have also been found with microplastics in their liver and other organs. The presence of microplastics can lead to metabolic imbalance, increased oxygen consumption, and altered gene expression, affecting reproduction and development.
The impact of microplastics on reproduction is significant. Studies have shown that exposure to microplastics affects the development of female follicles, maturation of oocytes, and sperm quality, impacting the fertility of both male and female mice. In oysters, microplastics can lead to a decrease in egg production, threatening population growth. Similar effects have been observed in other fish species, with reduced roe production and altered early offspring development.
The consequences of microplastics in the environment are far-reaching and detrimental to wildlife. With plastic pollution expected to increase, addressing this issue is crucial to mitigate the harmful effects on animal health and ecosystems.
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Plastic waste affects coral reefs, encouraging the growth of pathogens
Plastic waste is a global crisis that affects all wildlife, including coral reefs. Coral reefs are one of the most biodiverse ecosystems on the planet, providing vital fisheries and coastal defence. They are already under serious threat from climate change, and plastic waste is an additional stressor that contributes to their degradation.
Plastic debris has been found to increase the susceptibility of reef-building corals to disease. The likelihood of disease increases from 4% to 89% when corals are in contact with plastic. This is due to the physical damage that plastic causes to coral tissues, as well as the introduction of pathogens. Plastic waste can promote microbial colonisation by pathogens implicated in outbreaks of disease in the ocean, such as the genus Vibrio, which is associated with white syndromes in corals.
Plastic waste entanglement also exacerbates the risk of coral disease outbreaks. The more structurally complex the coral species, the more likely it is to snag plastic. This entanglement can cause light deprivation, toxin release, and anoxia, giving pathogens a foothold for invasion. In addition, the presence of plastic waste can alter the beneficial microbial symbionts that corals rely on.
Furthermore, analysis of plastic debris in the oceans has shown that corals may voluntarily ingest plastic, likely due to the chemical additives present in the plastic. This ingestion of plastic can further increase the risk of disease transmission and negatively impact the health of coral reefs.
The impact of plastic waste on coral reefs highlights the urgent need for better plastic waste management to reduce the amount of plastic entering ocean ecosystems and protect the biodiversity and services that coral reefs provide.
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Frequently asked questions
Plastic affects animals in a variety of ways, from ingestion to entanglement, habitat degradation, and chemical contamination. It can cause intestinal injury and death, and transfer plastic up the food chain. Plastic debris can break down into tiny plastic particles known as microplastics, which can pass through animals' digestive systems and be expelled without consequence. However, microplastics have been found in hundreds of species, and their presence has been linked to liver and cell damage, as well as disruptions to reproductive systems.
Plastic in the ocean has a direct and deadly effect on wildlife. Marine animals such as seabirds, whales, dolphins, seals, sea turtles, and even tiny seahorses can become entangled in plastic debris or ingest it, leading to injuries, suffocation, starvation, and drowning. Plastic waste can also encourage the growth of pathogens in the ocean, increasing the chances of disease in corals and other marine organisms.
Plastic waste dumped in forests and other unprotected wild lands puts wild animals in danger of encountering and consuming toxic materials. Microplastics can leech into the soil and nearby water sources from plastic waste in landfills, leading to a decrease in species that live below the surface, such as mites, larvae, and other tiny creatures. Chlorinated plastic can also release harmful chemicals into the surrounding soil and groundwater, potentially contaminating the food that wildlife consumes.
