NDLI: Variability in nitrate uptake kinetics of phytoplankton communities in a mediterranean coastal lagoon (1996).

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Variability in nitrate uptake kinetics of phytoplankton communities in a mediterranean coastal lagoon (1996).

Content Provider	CiteSeerX
Author	Y. Collos, A. A. Vaquer, A. B. Bibent, A. G. Slawyk, B. N. Garcia, B. P. Souchu, C.
Abstract	Nitrate uptake kinetics of different phytoplankton communities exhibit great variability over a 1-year period. Classical saturation kinetics accompanied by an induction phase are shown by blooms of Chaetoceros sp. in low nitrate waters. Biphasic kinetics, with transition points between 10 and 50 μM, are shown by blooms of Skeletonema costatum and flagellates, while unsaturated kinetics (up to 100 μM) are shown by Thalassiosira blooms and flagellate blooms. The latter also exhibit surge uptake of nitrate in situations of negative growth rates and rather high ammonium levels. The uptake patterns of the three diatom genera are similar to those observed in cultures or consistent with known internal nitrate accumulation characteristics. Based on the kinetic patterns presented, it is apparent that, for nitrate concentrations near 50 μM such as in upwelling areas, nitrate uptake will be underestimated in present models of nitrate assimilation by a factor of almost 2 for S. costatum and a factor of about 3 for Thalassiosira sp.
File Format	PDF
Publisher Date	1996-01-01
Access Restriction	Open
Subject Keyword	Nitrate Uptake Kinetics Mediterranean Coastal Lagoon Phytoplankton Community Nitrate Concentration Surge Uptake Thalassiosira Bloom Great Variability Flagellate Bloom Nitrate Assimilation Different Phytoplankton Community Thalassiosira Sp Internal Nitrate Accumulation Characteristic Biphasic Kinetics Present Model 1-year Period Classical Saturation Kinetics Negative Growth Rate Nitrate Uptake Skeletonema Costatum Diatom Genus High Ammonium Level Low Nitrate Water Chaetoceros Sp Transition Point Unsaturated Kinetics Kinetic Pattern Uptake Pattern Induction Phase
Content Type	Text

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