Effect of nutrients on culture dynamics of marine phytoplankton

Date

2006-01-01

Author

Eker-Develi, E
Kıdeyş, Ahmet Erkan
TUĞRUL, SÜLEYMAN

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

236
views

0
downloads

The effects of nitrate, ammonium and phosphate on the abundance, chlorophyll a content (chl a), in vivo fluorescence, particulate organic carbon, nitrogen, phosphorus and cell morphology of the diatom Skeletonema costatum, the dinoflagellate Prorocentrum micans and the coccolithophore Emiliania huxleyi were investigated in the laboratory. The carbon:chlorophyll a ratio (as weight), a parameter often used in productivity estimates, differed substantially among the three species as well as at different nutrient concentrations at the end of the exponential growth phase. The cell chl a content was higher in the earlier phases of growth in all three species in agreement with previous investigations. Average chl a content per cell during the experiments was higher in P. micans (8 pg) than in S. costatum (0.4 pg) and E. huxleyi (0.2 pg). However, chl a content per unit volume was higher in E. huxleyi (similar to 15 fg mu m(-3)) than in S. costatum (similar to 7 fg mu m(-3)) and P. micans (similar to 1 fg mu m(-3)). Prorocentrum micans cultures reached the highest total biovolume (74 mm(3) L(-1) and was 3 and 5 times higher than S. costatum and E. huxleyi cultures, respectively) under high nutrient concentrations. Nevertheless, total chl a concentration of S. costatum culture was almost twice higher (122 mu g L(-1)) than that of the other two species at the end of the exponential growth phase. Phosphate consumption by S. costatum occurred at higher rates compared to the other two species during the experimental period, probably showing that this nutrient was more favourable for this species. Our findings from these laboratory experiments emphasize that chl a values in the natural habitat may not accurately indicate actual phytoplankton biomass.

Subject Keywords

Phytoplankton Cultures, Chlorophyll A, Carbon, Biovolume, In Vivo Fluorescence

URI

https://hdl.handle.net/11511/31270

Journal

AQUATIC SCIENCES

DOI

https://doi.org/10.1007/s00027-005-0810-5

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Effect of heat treatment on the stress and structure evolution of plasma deposited boron nitride thin films Anutgan, T. Aliyeva; Anutgan, M.; Wdemir, O.; Atilgan, I.; Katircioglu, B. (Elsevier BV, 2008-03-25) Boron nitride (BN) thin films are deposited at 573 K by plasma enhanced chemical vapor deposition (PECVD) with ammonia (NH3) and hydrogen diluted diborane (15% B2H6 in H-2) source gases. UV-visible and Fourier transform infrared (FTIR) spectroscopies together with surface profilometry are used for the film characterization. These films are hydrogenated (BN:H) whose hydrogen content is pursued following the 1.5 h annealing process at 748 K, 923 K and 1073 K under nitrogen atmosphere. Hydrogen escape with the...
Effect of Different Homogenization Techniques on the Particle Size of Liposomes and Storage Characterization by NMR Relaxometry Güner, Selen; Öztop, Halil Mecit (null; 2015-08-12) Liposomes are double-layered spherical vesicles made up of polar lipids and could be used in pharmaceutical, personal care, chemical and food industries to encapsulate both hydrophobic and hydrophilic compounds. Being biodegradable, biocompatible not having any toxic effects and having the ability to release the active agents when desired make these systems advantageous for many applications. The main natural sources used for liposomes are egg and soy. In this study, egg and soy lecithin with higher purity ...
Effects of oxidative functionalized and aminosilanized carbon nanotubes on the crystallization behaviour of polyamide-6 nanocomposites Kaynak, Cevdet (2014-04-01) The purpose of this study is to investigate effects of oxidative functionalized and aminosilanized carbon nanotubes on the (1) isothermal and (2) non-isothermal crystallization kinetics of polyamide-6 by DSC analyses, and (3) crystal structure of injection molded specimens by XRD analyses. Nanocomposites were compounded by using melt mixing technique via twin screw extrusion. Due to basically very effective heterogeneous nucleation effect, both increasing amount and surface functionalization of carbon nanot...
Effect of salinity on antioxidant responses of chickpea seedlings Eyidogan, Fuesun; Oez, Mehmet Tufan (2007-10-01) The changes in the activity of antioxidant enzymes, like superoxide dismutase, ascorbate peroxidase, catalase and glutathione reductase, and growth parameters such as length, fresh and dry weight, proline and H2O2 contents, chlorophyll fluorescence (Fv/Fm), quantum yield of PSII and the rate of lipid peroxidation in terms of malondialdehyde in leaf and root tissues of a chickpea cultivar (Cicer arietinum L. cv. Gokc,e)under salt treatment were investigated. Plants were subjected to 0.1, 0.2 and 0.5 M NaCl t...
Influence of oxygen transfer on benzaldehyde lyase production by recombinant Escherichia coli BL21(DE3) pLySs Angardi, Vahideh; Çalık, Pınar; Department of Chemical Engineering (2007) In this study, the effects of oxygen transfer conditions on the synthesis of the enzyme benzaldehyde lyase as intracellular in recombinant E. coli BL21 (DE3) pLysS was investigated sistematically and a comprehensive model was developed to determine benzaldehyde lyase activity. For this purpose, the research program was carried out in mainly two parts. In the first part of study, the effects of oxygen transfer together with the mass transfer coefficient (KLa), enhancement factor E (=KLa/KLao), volumetric oxy...

Citation Formats

E. Eker-Develi, A. E. Kıdeyş, and S. TUĞRUL, “Effect of nutrients on culture dynamics of marine phytoplankton,” AQUATIC SCIENCES, pp. 28–39, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31270.