The concerning disappearance of amphibians in protected areas is generating serious concerns among scientists. Although it was thought that the protection of natural habitats prevented species extinction, recent studies indicate that there are threats that surpass the strongest conservation barriers.
Why are amphibians disappearing even in protected forests?
A study conducted in a cloud forest of the Andes in Colombia documented an alarming reduction of amphibians over 35 years. This phenomenon is not due to deforestation or habitat degradation, but to an emerging disease affecting these species worldwide.
The introduction of invasive species is also a considerable threat. These invaders compete for resources or transmit diseases that local amphibians cannot combat, leading to the disappearance of native species.
The fungus Batrachochytrium dendrobatidis, which causes chytridiomycosis, has been identified as a lethal pathogen for amphibians, even in ecosystems considered well conserved.
The research reveals a discouraging panorama: in three decades, a community of 39 amphibian species has been reduced to only 13 surviving species. Most of these are in danger of disappearing completely.
This fungus infects the skin of amphibians, a vital organ for their respiration and water balance, causing physiological alterations that can lead to death.
The collapse of these populations in well conserved natural environments shows that ecosystem conservation, although crucial, is not always sufficient to protect against emerging diseases.
Furthermore, the disappearance of amphibians directly impacts the balance of ecosystems. Frogs, toads, and salamanders control insects, are part of various food chains, and act as environmental indicators.
Conservation experts face the challenge of managing emerging diseases related to globalization and international transport. Early detection of outbreaks and developing protection strategies are key tools to prevent future losses.
Understanding the spread of these pathogens will improve conservation programs and increase the chances of survival for threatened species.
The amphibian crisis is a clear example that threats to biodiversity are more complex than simple habitat destruction. Science must continue investigating to better understand why amphibians are disappearing in protected forests and how to mitigate this problem.
