The biology of caves and other subterranean habitats

The subterranean domain

Sources of energy in subterranean environments

Survey of subterranean life

Ecosystem function

Biotic interactions and community structures

Adaptations of subterranean life

Colonization and speciation in subterranean environments

Geography of subterranean biodiversity

Some representative subterranean communities

Conservation and protection of subterranean habitats.