Term Name:	detection of hypoxia
Synonyms:	detection of reduced oxygen levels
Definition:	The series of events in which a stimulus indicating lowered oxygen tension is received by a cell and converted into a molecular signal. Hypoxia, defined as a decline in O2 levels below normoxic levels of 20.8 - 20.95%, results in metabolic adaptation at both the cellular and organismal level.
Ontology:	GO: Biological Process [GO:0070483]    QuickGO    AmiGO