Amphibians continue to rank among the most threatened animals on the planet due to a combination of factors that worsen their situation year after year. The progressive disappearance of wetlands, the pollution of water bodies, and the encroachment of urbanization into natural areas have pushed many species to the brink of extinction, with the axolotl ( Ambystoma mexicanum ) being one of the best-known and most emblematic examples.
In recent years, the scientific community has intensified efforts to understand the causes of amphibian decline and find solutions to halt it. As a group, amphibians are especially vulnerable because their skin, which they use to breathe, directly exposes them to even the slightest changes in their environment, making them sensitive to the effects of pollution, temperature fluctuations, and the introduction of chemicals into the water.
Causes that threaten the survival of amphibians
The advance of urbanization and the deterioration of the natural environment are two of the main threats to amphibians. Species such as the axolotl, endemic to Lake Xochimilco, are experiencing an alarming reduction in their habitat due to land use, pollution, and climate change.
Added to this is the difficulty of surviving outside their natural habitat , since any alteration, such as increased water temperature or the presence of pollutants, directly impacts their health and reproductive capacity. Unlike other vertebrates, amphibians lack natural skin protection, which exacerbates their vulnerability.
Conservation and reintroduction experiences
In response to the crisis, research teams have developed projects to evaluate the reintroduction of captive-bred species into restored environments . A recent study conducted by Mexican universities examined the feasibility of releasing axolotls into both natural and artificial wetlands and monitored their adaptation and survival rates.
The results indicate that captive-bred axolotls were able to survive and feed themselves in both types of ecosystems. However, those released into an artificial environment showed larger distribution ranges and greater daily movements, while in Lake Xochimilco, mobility was more restricted. Although some individuals suffered predation, all showed an ability to adapt to their new environment.
Restoring constructed wetlands can be an effective tool to ensure the short-term survival of these species, providing stability in the face of climate change or the deterioration of their original habitat. However, experts agree that the real solution lies in restoring and protecting the natural ecosystems on which these animals depend.
The challenge of long-term conservation
Experts warn that while captive breeding is viable and can produce many individuals , the key to success lies in restoring the native habitat and working with local communities, such as traditional farmers and fishermen. The axolotl, for example, depends entirely on Lake Xochimilco, and its conservation requires collaborative efforts to reduce pollution, restore vegetation, and limit human impact in the area.
Furthermore, those involved in these projects emphasize the need to expand restoration efforts , as only a small portion of the wetlands has been recovered so far. Promoting public awareness and sustainable management are essential steps to ensure the long-term survival of healthy populations.
Why amphibian survival is essential
Amphibians are key indicators of environmental health due to their sensitivity to changes in their surroundings. Their disappearance not only endangers the species itself, but also the entire aquatic ecosystem they inhabit , affecting water quality and the biodiversity of the area.
It is essential to understand that protecting amphibians contributes to maintaining ecological balance, as they play important roles in pest control and the food chain. Therefore, their conservation is a commitment that involves the entire society and environmental institutions.