Multi-Parametric Relationships between PAM Measurements and Carbon Incorporation, an In Situ Approach
Open Access
- 20 July 2012
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 7 (7), e40284
- https://doi.org/10.1371/journal.pone.0040284
Abstract
Primary production (PP) in the English Channel was measured using 13C uptake and compared to the electron transport rate (ETR) measured using PAM (pulse amplitude modulated fluorometer). The relationship between carbon incorporation (Pobs) and ETR was not linear but logarithmic. This result can be explained by alternative electron sinks at high irradiance which protect the phytoplankton from photoinhibition. A multi-parametric model was developed to estimate PP by ETR. This approach highlighted the importance of taking physicochemical parameters like incident light and nutrient concentrations into account. The variation in the ETR/Pobs ratio as a function of the light revealed different trends which were characterized by three parameters (Rmax, the maximum value of ETR/Pobs; ERmax, the light intensity at which Rmax is measured; γ the initial slope of the curve). Based on the values of these three parameters, data were divided into six groups which were highly dependent on the seasons and on the physicochemical conditions. Using the multi-parametric model which we defined by Pobs and ETR measurements at low frequencies, the high frequency measurements of ETR enabled us to estimate the primary production capacity between November 2009 and December 2010 at high temporal and spatial scales.Keywords
This publication has 50 references indexed in Scilit:
- Effects of simulated benthic fluxes on phytoplankton dynamic and photosynthetic parameters in a mesocosm experiment (Bay of Brest, France)Estuarine, Coastal and Shelf Science, 2010
- On the interest of using field primary production data to calibrate phytoplankton rate processes in ecosystem modelsEstuarine, Coastal and Shelf Science, 2009
- Short-term variability of the phytoplankton community in coastal ecosystem in response to physical and chemical conditions' changesEstuarine, Coastal and Shelf Science, 2008
- Operational estimation of primary production at large geographical scalesRemote Sensing of Environment, 2008
- Phytoplankton processes during a mesoscale iron enrichment in the NE subarctic Pacific: Part III—Primary productivityDeep Sea Research Part II: Topical Studies in Oceanography, 2006
- Variations in the light absorption coefficients of phytoplankton, nonalgal particles, and dissolved organic matter in coastal waters around EuropeJournal of Geophysical Research: Oceans, 2003
- The use of variable fluorescence measurements in aquatic ecosystems: differences between multiple and single turnover measuring protocols and suggested terminologyEuropean Journal of Phycology, 2003
- Influence of temperature on the relationship between oxygen- and fluorescence-based estimates of photosynthetic parameters in a marine benthic diatom(Cylindrotheca closterium)European Journal of Phycology, 2003
- Phytoplankton bloom dynamics in coastal ecosystems: A review with some general lessons from sustained investigation of San Francisco Bay, CaliforniaReviews of Geophysics, 1996
- Use of active fluorescence to estimate phytoplankton photosynthesis in situLimnology and Oceanography, 1993