Parameter Tree:
EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > DIURNAL MOVEMENTS

Definition:
Diurnal movements are movements that occur at daily intervals as applied
to such daily rhythms as leaf or flower opening and closing or the
characteristic rise and fall of temperature associated with the hours of
light and darkness. 


Reference:
Allaby, Michael. 1994. Ecology. Oxford University Press. Oxford, New York.