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Dynamic behaviour of photosynthesis-irradiance curves determined from oxygen production during variable incubation periods

1998; Inter-Research; Volume: 165; Linguagem: Inglês

10.3354/meps165031

1616-1599

Maria Filomena Macedo, J.G. Ferreira, Pedro Duarte,

Algal biology and biofuel production

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 165:31-43 (1998) - doi:10.3354/meps165031 Dynamic behaviour of photosynthesis-irradiance curves determined from oxygen production during variable incubation periods M. F. Macedo1,*, J. G. Ferreira1, P. Duarte2 1Dept of Environmental Sciences & Engineering, Faculty of Sciences and Technology, New University of Lisbon, P-2825 Monte de Caparica, Portugal 2Dept of Sciences & Technology, Fernando Pessoa University, Praça 9 de Abril 349, P-4200 Porto, Portugal *E-mail: mfmd@helios.si.fct.unl.pt Production and consumption of oxygen were analysed in phytoplankton populations using a fast biomass-concentration technique. The variation of productivity with irradiance was studied using different incubation periods, from minutes to hours. The influence of the exposure time on the photosynthesis-irradiance (P/I) curve parameters was analysed. The results show that dissolved oxygen concentration in the water does not increase linearly with time and that PBmax (maximum biomass-specific production rate and Iopt (optimal light intensity) are time-dependent. Exponential and linear expressions were proposed to describe PBmax and Iopt as a function of time. A model was built to investigate the importance of static (steady-state) vs dynamic (time-dependent) simulation in the prediction of phytoplankton production under different light intensities. The results show the importance of using dynamic expressions for the P/I relationship, especially in a mixed water column. Biomass concentration · Phytoplankton productivity · Short incubation periods · Oxygen method · Ecological model Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 165. Publication date: May 07, 1998 Print ISSN:0171-8630; Online ISSN:1616-1599 Copyright © 1998 Inter-Research.