Kiera Jefferson
Pollution and climate change are significant contributors to the extinction of animal species. According to the International Union for Conservation of Nature, there are over 42,000 endangered species of animals and plants. Marine pollution, for example, has led to the destruction of marine ecosystems and the death of many animals. Plastic pollution, in particular, has been declared more deadly to sea turtles than oil spills, and whales are also highly susceptible to ingesting plastic. Climate change is also a critical factor, threatening over 14,000 species on the IUCN Red List, and projections indicate that a 2°C temperature rise by 2100 could place about 18% of all land species at high risk of extinction.
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What You'll Learn
- Reptiles are highly susceptible to plastic pollution
- Climate change is causing Hawaiian honeycreepers to go extinct
- Plastic pollution is more deadly to sea turtles than oil spills
- Agriculture and aquaculture are the biggest threats to endangered species
- Industrial pollution is expected to impact 48 species in the US
Reptiles are highly susceptible to plastic pollution
Plastic pollution is a pressing issue that poses a grave threat to various animal species, and reptiles are particularly susceptible to its harmful effects. While plastic pollution endangers many creatures, from sea organisms to land mammals, reptiles face specific risks that make them highly vulnerable.
Reptiles, including sea turtles and various lizard species, often mistake plastic debris for food due to its resemblance to their natural prey. This leads to the ingestion of plastic, which can cause severe health issues. For example, plastic can obstruct their digestive systems, impair nutrient absorption, and damage internal organs. The rough edges of broken-down plastic pieces can cause internal injuries, a condition known as plasticosis, which can lead to fibrosis and further digestive complications.
The ingestion of plastic also has indirect consequences for reptiles. For sea turtles, consuming plastic can lead to positive buoyancy, making it difficult for them to dive for food. This can result in starvation and increased vulnerability to predators or boat strikes. Additionally, plastic pollution on beaches can alter the sand temperature, impacting the gender ratio of hatchling sea turtles, as incubation temperature determines their sex.
Beyond ingestion, reptiles can become physically trapped or entangled in plastic materials, such as nets, ropes, and six-pack rings. This restriction of movement can lead to serious injuries or even death. Furthermore, plastics are a source of toxic chemical leaching, which can contaminate the environment and impact the endocrine systems of reptiles, making them more susceptible to diseases.
The impact of plastic pollution on reptiles is a significant concern, and it highlights the urgent need for action to reduce plastic consumption and improve waste management practices. By addressing this issue, we can help protect reptiles and preserve the delicate balance of ecosystems that they are a part of.
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Climate change is causing Hawaiian honeycreepers to go extinct
Climate change is causing Hawaiian honeycreepers to move towards extinction. Hawaiian honeycreepers, known for their spectacular adaptive radiation, are susceptible to the negative impacts of climate change. The warming climate allows the southern house mosquito, an invasive species, to move into the honeycreepers' habitat. The mosquitoes feed on the birds and spread avian malaria, a fatal blood-borne parasite to which the honeycreepers have lost resistance. Climate change also enables mosquitoes to survive at higher elevations, endangering honeycreepers in previously mosquito-free areas.
The Hawaiian honeycreepers are not alone in their plight against climate change and human-caused threats. Since the Industrial Revolution, human activities have drastically altered ecosystems and accelerated climate change, leading to the extinction of numerous animal species. Pollution, habitat destruction, and overexploitation of resources are significant contributors to the current extinction crisis.
Native Hawaiians share a deep cultural connection with the honeycreepers, considering them family, ancestors, and spiritual figures. Out of the initial 50 species, only 17 remain, with some facing extinction within the next one to ten years. The 'akikiki, 'akeke'e, 'kohekohe, and kiwikiu are among the most vulnerable, with small populations, restricted ranges, and the growing prevalence of disease in their habitat.
Conservation efforts are underway to prevent the impending extinction of Hawaiian honeycreepers. Strategies include implementing the Incompatible Insect Technique (IIT) to suppress mosquito populations and reduce the spread of avian malaria. The collaboration between biologists, policymakers, conservationists, and Native Hawaiian biocultural experts aims to protect these unique bird species and preserve Hawai'i's natural and cultural heritage.
The race to save the Hawaiian honeycreepers from extinction highlights the urgent need to address climate change and its devastating impacts on vulnerable species. With concerted conservation efforts and a commitment to mitigating climate change, there is hope for the survival and recovery of these magnificent birds.
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Plastic pollution is more deadly to sea turtles than oil spills
While pollution has caused the extinction of many animal species, plastic pollution is particularly deadly to sea turtles. Sea turtles have existed for over 100 million years, but plastic pollution poses a new and devastating threat to their survival.
Plastic pollution affects sea turtles in two main ways: ingestion and entanglement. Sea turtles can ingest plastic by mistaking it for their natural food, such as plastic bags that resemble jellyfish, or by accidentally consuming plastic fragments present among their natural food. Researchers have found that sea turtles are attracted to the smell of marine plastics, likely due to the organisms that attach themselves to plastic debris. As a result, it is estimated that more than half of all sea turtles have ingested plastic.
When sea turtles eat plastic, it can cause physical damage to their intestines, lead to blockages, and create a false sense of fullness, resulting in sickness or even death. The ingested plastic can get trapped in their stomachs, preventing them from properly swallowing food. This can lead to starvation or make them vulnerable to predators. Additionally, the decomposition of plastic within their bodies can cause gas buildup, making them float uncontrollably.
Furthermore, plastic pollution affects sea turtles at various stages of their life cycle and in different habitats, from the beaches where they nest to the open ocean. Even as hatchlings, they may encounter plastic debris on their way to the ocean and continue to face plastic pollution during migration.
While oil spills are also detrimental to marine life, plastic pollution's pervasive and persistent nature makes it a more constant and widespread threat to sea turtles. Plastic pollution enters the oceans at a rate of 5-13 million metric tons annually, with an estimated 100 million tons already present in the oceans. This plastic breaks down into smaller, more toxic pieces, making it easier for turtles to ingest and causing further damage to their health.
Therefore, plastic pollution poses a significant and immediate danger to sea turtles, outpacing the impact of oil spills. The ingestion of plastic and its detrimental effects on sea turtles' health and survival highlight the urgent need to address plastic pollution in our oceans.
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Agriculture and aquaculture are the biggest threats to endangered species
The current extinction rate is estimated to be 100 to 1,000 times higher than the natural baseline rate, with human population growth and overconsumption being the main drivers. Agriculture and aquaculture are significant contributors to this alarming rate, posing threats to endangered species through habitat degradation, the introduction of invasive species, and pollution.
Agriculture has been a key driver of habitat degradation, particularly through practices such as deforestation, soil consumption, and the introduction of non-native species. For example, the golden apple snail, an invasive species introduced to Southeast Asia, has infested approximately 1.4 million hectares of rice fields in the Philippines, causing significant economic losses and threatening the region's ability to achieve Sustainable Development Goal (SDG) 15.8, which aims to prevent the impact of invasive species in terrestrial and aquatic ecosystems. Similarly, the suckermouth catfish, originally from South America, was introduced to Southeast Asia as an ornamental fish but has since escaped into the wild, posing a unique challenge to aquaculture and agriculture due to its sharp spines and rapid reproduction rate.
Aquaculture, on the other hand, has been associated with the introduction of non-native species into ecosystems, which can outcompete native species for resources and habitat. According to the Food and Agriculture Organization of the United Nations (FAO), Atlantic salmon, Whiteleg shrimp, and Red swamp crawfish dominate the cultured crustaceans industry, and their cultivation can have adverse effects on native ecosystems. Additionally, aquaculture operations use various chemicals, pesticides, and parasiticides that can contaminate the surrounding marine environment and food sources for naturally occurring populations.
The expansion of agriculture and aquaculture practices can also lead to the overexploitation of land and water resources, further endangering species that are already vulnerable. This is particularly evident in the case of overfishing, where capture fisheries have recorded only a 1.5% increase in production while aquaculture has seen a remarkable 300% growth. The intensification of agriculture and aquaculture can also contribute to pollution, with plastic and oil pollution being significant concerns in marine environments.
The impacts of agriculture and aquaculture on endangered species are complex and far-reaching. While these practices can offer economic benefits and sustainable alternatives, such as reducing overfishing through aquaculture, it is crucial to address their negative consequences. Implementing preventative measures, improving policies, and supporting conservation efforts are essential steps toward mitigating the threats posed by agriculture and aquaculture to endangered species.
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Industrial pollution is expected to impact 48 species in the US
Industrial pollution is a significant contributor to the extinction of animal species. While extinction is a natural phenomenon, human activities have accelerated it at an alarming rate. The current rate of species extinction is estimated to be 100 to 1,000 times higher than the natural baseline rate, with human population growth and overconsumption being the primary drivers.
In the United States, industrial pollution is expected to impact 48 species, including 47 animal species and one plant species. This prediction is based on the assessment of 494 critically endangered species in the country, of which 69% are projected to continue declining. The impact of industrial pollution on these species includes the release of wastewater, industrial effluents, pollutants, and excess energy pollution.
One of the most well-known examples of a species driven to extinction by human activities is the passenger pigeon. Once abundant in the United States, they were easy targets for hunters due to their large flocks. Commercial hunting led to their decimation, and the last passenger pigeon died in 1914.
Other species threatened by pollution include marine life, such as whales, dolphins, and harbour porpoises, which are affected by plastic pollution and toxic chemicals. Reptiles are also highly susceptible to plastic pollution, and over one million marine animals die each year due to plastic debris in the ocean. Additionally, bumblebees are disappearing at rates consistent with mass extinction, with eight species expected to be impacted by industrial pollution in the US.
The WWF reports that every year, about 600 tons of plastic and 500 tons of oil are introduced into our seas, destroying marine ecosystems and killing many animals. Soil consumption, deforestation, and overexploitation of resources further contribute to habitat destruction and the decline of species.
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