A. Shiomoto et S. Matsumura, DIEL PERIODICITY IN DARK UPTAKE OF AMMONIUM BY NATURAL-POPULATIONS OFMARINE-PHYTOPLANKTON, Journal of plankton research, 15(11), 1993, pp. 1333-1339
We discovered the phenomenon that dark uptake of ammonium increases at
night and maximizes around midnight. The maximum values at midnight a
re 2 or 3 times higher than the values in the daytime.