Etude de la fertilité des eaux marines au moyen de tests biologiques effectués avec des cultures d'algues. III. Réponses de la diatomée Skeletonema costatum à différentes concentrations d'éléments nutritifs
| العنوان: | Etude de la fertilité des eaux marines au moyen de tests biologiques effectués avec des cultures d'algues. III. Réponses de la diatomée Skeletonema costatum à différentes concentrations d'éléments nutritifs |
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| المؤلفون: | B. R. Berland, J. P. Pointier, D. J. Bonin, S. Y. Maestrini |
| المصدر: | Internationale Revue der gesamten Hydrobiologie und Hydrographie. 58:401-416 |
| بيانات النشر: | Wiley, 1973. |
| سنة النشر: | 1973 |
| مصطلحات موضوعية: | Chlorophyll a, biology, Phosphorus, chemistry.chemical_element, Aquatic Science, biology.organism_classification, Nitrogen, chemistry.chemical_compound, Nutrient, Diatom, chemistry, Biochemistry, Environmental chemistry, Seawater, Chelation, General Agricultural and Biological Sciences, Chemical composition, Ecology, Evolution, Behavior and Systematics |
| الوصف: | The growth of the diatom Skeletonema costatum in culture media, with different nutrients concentrations, is followed by measuring and comparing the cell density and the nitrogen, proteins, carbon, carbohydrates, chlorophyll a and ATP contents. The experiments are carried out in order to decide the best enrichments which have to be used for the measurement of growth-potential of sea water, with S. costatum as a test organism. The cell density appears to be ruled by very low concentrations of phosphorus, silicates, vitamin B12 and also by nitrogen, but with less importance. With iron and chelator EDTA the answers are not easy to understand (because of the role of EDTA to get metal available). Inhibition appears with the highest concentrations. In phosphorus, silicium and vitamins starvation, the size of cells increased (the informations obtained from cell density and other parameters are not similar). Cell ATP content is especially linked with silicium and phosphorus concentrations in the medium, chlorophyll a content follows mainly the nitrogen evolution, but also that one of phosphorus. The cell density measurement does not appear always to be the best way to obtain valuable data of growth-potential of sea water. But, if several nutrients are supposed to rule this growth-potential, and if only one method can be used, it is then the most convenient to get averaged informations. The maximum growth is obtained from low concentrations of nitrogen, iron and EDTA in the media. With S. costatum the best enrichments, for growth potential experiments, range from 0,25 to 1 time the chemical composition of the ASP 2 solution of PROVASOLI et al. (1957) as nitrogen, phosphorus, silicium, iron, metal mix, EDTA and vitamins are concerned. This values could be lowered with other species. |
| تدمد: | 1522-2632 0020-9309 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::a24004aedcda912465ee23376c68f44f https://doi.org/10.1002/iroh.19730580307 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........a24004aedcda912465ee23376c68f44f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15222632 00209309 |
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