The western United States, Central America, South America, eastern Australia, and Fiji have experienced the most severe declines (although cases of amphibian extinctions have appeared worldwide).
Amphibians are sensitive to environmental change because of their direct development and lack of mobility as adults. The factors that threaten amphibians include habitat loss and degradation, invasive species, chemical pollution, infectious diseases, climate change, and human activity. Many species are already endangered because of these factors; if nothing is done, more species will likely become extinct.
In conclusion, amphibians are in danger of extinction due to their limited distribution and sensitivity to changes in their environment. Amphibians are important for maintaining balance in ecosystems because they act as prey for other animals and play a role in pollination. Therefore, saving amphibians is important for saving ourselves.
Clearly, habitat degradation is the most significant factor leading to amphibian population decreases. The reasons of recent amphibian reductions are numerous, but the most serious dangers to frogs are regarded to be a new illness called chytridiomycosis and global climate change. Chytridiomycosis is a fungal disease that affects both terrestrial and aquatic amphibians, causing them to lose their skin due to excessive water loss through their skin rather than sweating. This disease was first discovered in 2002 in Central America where it was killing millions of frogs overnight. It is estimated that this disease has caused the extinction of more than 95% of all amphibian species since it was identified.
Climate change is another major threat to amphibians. As the temperature increases, so will the rate at which frogs spawn. This leads to more fertilized eggs and smaller populations over time. Rising temperatures can also cause dangerous insect outbreaks that kill off large numbers of frogs. Finally, some frogs are being caught by hunters who sell their skins on the black market for use in counterfeit merchandise.
What can we do to help protect amphibians? The best thing you can do to protect amphibians is not to harm any part of their habitat. This includes building structures in or near wetlands, cutting down trees in forest areas, and performing other actions that may degrade your environment.
Amphibians are the most endangered vertebrate group, with one-third of presently known species facing extinction (IUCN, 2008) and the majority undergoing population decreases (Stuart et al., 2004). The main cause of extinction for amphibians is disease - particularly chytridiomycosis, a fungal infection that causes death of tissue around the skin surface - but other factors such as habitat loss, pollution, invasive species and conflict over resources also play a role.
Reptiles are second on the list, with an estimated 100 million individuals currently threatened with extinction (Bird Life International, 2008). The major threat to reptiles is also disease - in particular, snake bites which can lead to blood poisoning if not treated quickly enough - but other factors including human activity such as hunting for meat or leather products, habitat loss and climate change also play a role.
Birds are the most abundant group of animals on Earth and account for nearly 4% of all living species (Wilson et al., 2002). However, approximately 1 in 10 birds are threatened with extinction (Bird Life International, 2008), mostly due to loss of habitat through deforestation, mining operations and other forms of development. Other factors contributing to bird extinction include hunting for food or feathers, introduced species and diseases.
The number of species facing extinction is anticipated to climb as people continue to modify forest environments. The original progenitor of amphibians diversified into several diverse groups of amphibians over time, giving rise to the various amphibian species that exist today. It is possible for humans to become a new species through genetic engineering or some other means; however, this will not happen until later in Earth's history.
Amphibians have evolved from an ancient lineage of animals that first appeared more than 500 million years ago. They are part of the class Amphibia of tetrapods (four-legged animals). Amphibians are characterized by their ability to move between water and land, and many species possess glands that produce fluid reservoirs of liquid oxygen and nitrogen that allow them to breathe while underwater. Some species are capable of freezing to death in ice water or burning themselves alive in a fire, showing that they can withstand very cold temperatures and intense heat, respectively. Others depend on camouflage or other defenses to protect themselves from predators.
Amphibians have been extirpated (completely removed) from many areas where they used to live. One reason for this is that people prefer to live near water with easy access to land, which is necessary for an amphibian to breed. Another reason is that certain frogs and toads are eaten by people, so they are hunted for food.
What is causing the decline in frog and toad populations? Despite the fact that amphibians are rapidly falling over the world, research indicates that there is no smoking gun—and consequently no simple solution—to slowing or reversing these decreases. Though amphibian reductions have occurred in every area of the United States, the dangers vary by place. For example, in areas where the climate is warm year-round, frogs and toads can withstand more heat than those living in colder climates and so can handle hotter temperatures without suffering adverse effects.
Amphibians' skin is very sensitive to changes in temperature. If a frog or toad's environment gets too hot or cold, it cannot move away from these temperatures; instead, it will suffer harm to its organs or even death. Climate change is expected to increase both the frequency and intensity of heat waves and cold snaps. This is bad news for frogs and toads, which rely on constant temperatures for survival. As their environments heat up or cool down, amphibians are at risk of dying off-
Another factor affecting frog and toad populations is disease. There are several threats facing amphibians that have nothing to do with humans. One major threat is called chytridiomycosis. This disease causes severe skin lesions when it infects an amphibian, and since most infected animals will eventually die, it can cause diseases to spread as the survivors try to protect themselves from further damage by avoiding predators and competition. Another danger is called lyssa.
The major reason for the reduction of salamanders in the United States is habitat loss. Invasive animals such as pigs are also posing an increasing danger to many species, and experts believe that worldwide losses in insect abundance are also having a significant impact on them.
Salamanders are amphibians; this means they need water to live in and breathe through their skin instead of lungs. This makes them vulnerable to changes in their environment: if there is no water or if it is contaminated with chemicals from factories or farms, then these animals will die. Climate change is also a threat to salamanders: if the temperature gets too hot or too cold, they can die. Additionally, if a salamander is injured, it can't move away from the source of pain which can lead to death.
Endangered species are animals that are in danger of becoming extinct because of human activity. Salamanders were once widespread throughout North America but now exist only in the eastern part of the continent. They may be able to survive in other parts of the world but here in the US we're taking their habitat away to supply meat for consumers or leather for products so they can't escape the danger we pose to them.
There are several factors that could help salamanders recover after being listed as an endangered species. The first thing would be to remove the animal from the list.