Premium
Oxygen Productivity of Planktonic Algae under Fluctuating and Constant Light Conditions
Author(s) -
Gervais Frank
Publication year - 2011
Publication title -
international review of hydrobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 1434-2944
DOI - 10.1002/iroh.201111277
Subject(s) - photic zone , algae , productivity , irradiance , water column , light intensity , plankton , incubation , phytoplankton , biology , oxygen , botany , oceanography , atmospheric sciences , chemistry , ecology , physics , nutrient , geology , optics , biochemistry , macroeconomics , organic chemistry , economics
Net oxygen productivity in cultures of Monoraphidium minutum , Cryptomonas sp. and Planktothrix agardhii exposed to fluctuating and constant light conditions was measured in a laboratory incubator. The fluctuating light climate simulated a linear up and down movement in a 2 m water column at 4 different ratios of euphotic depth to mixing depth. In addition, cultures were kept at a constant light climate simulating static incubation at 0, 0.5, 1 and 2 m depth and at the depth of the mean irradiance, respectively. Integral productivity in the simulated water column was lowest when algae were incubated at constant light in different depths, highest when the algae were incubated at constant mean photon flux density (PFD) and intermediate under fluctuating light. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)