Alice Alldredge is an American oceanographer and marine biologist who studies marine snow, carbon cycling, microbes and plankton in the ecology of the ocean. She has conducted research in the open sea, at her laboratory at the University of California, Santa Barbara as well as in collaboration with the Long Term Ecological Research Network (LTER) at the Moorea Coral Reef Study in Mo'orea, French Polynesia. According to the annual ISI Web of Knowledge list published by Thomson Reuters, she has been one of the most cited scientific researchers since 2003.