"and their were discovered in 1977. While the hot-water springs were predicted to occur at s, no one expected to find them colonized by exotic invertebrate faunas. Accustomed to a view of the deep sea as a food-limited environment, the puzzle of how lush communities could be maintained provoked biologists into a flurry of research activity. ... As field programs multiplied and more vent communities were discovered, biogeographic patterns in the distribution of faunas became apparent and ecological issues of requirements, , and began to be addressed. associated with diverse settings, from and s to . Massive bacterial blooms triggered by the release of nutrients during a volcanic eruption, rapid colonization of new vents by invertebrates, and burial of extant vent communities by lava flows demonstrate the dynamic nature of hydrothermal systems. Perhaps the most provocative consequence of the discovery of seafloor hydrothermal vents is the ."