Glacier caves: a globally threatened subterranean biome

Caves and cave-like voids are common features within and beneath glaciers. The physical environment is harsh and extreme, and often considered barren and devoid of life. However, accumulating evidence indicates that these caves may support a diverse invertebrate fauna with species endemic to each region. As glaciers continue to disappear at an alarming rate due to global warming, they take their largely unknown fauna with them. Thus, glacier caves may harbor one of the most endangered ecosystems globally, and yet their biodiversity is among the least studied or known. Faunal surveys and ecological studies are urgently needed before all examples are lost.