Research Information System
1st International Symposium on Biodiversity Research, , Çanakkale, Turkey, 2 - 04 September 2019, vol.1, no.1, pp.517
Importance of environmental factors in the regulation of Diatom life processes
Sezgi Adalıoğlu
Institute of Marine Sciences and Technology, Dokuz Eylül University, İzmir-Turkey
e-mail: sezgi.aoglu@deu.edu.tr
Obtaining information about the factors that determine the life dynamics of microalgae biomass and the
ability to use nutrient is of vital importance to understand food chain and primary production. Diatoms,
which have special appearance with silica structure, are one of the majör groups of microalgae. The aim of
this study was to investigate the factors affecting the survival of diatom culture obtained from the Izmir
Bay. In order to determine the effect of environmental factors, nutrient light intensity and temperature are
regulated by changing a single variable in each experiment. Some reactors showed the expected life
expectancy, while others passed to the stage of recovery growth phase while passing into the death phase
and a long-life span was observed. In this study, we will investigate the factors that affect long life and how
it regulates the life cycle.
In order to determine the effect of the experiment, each variable was tested in itself. Depending on the
amount of increase in the experiments starting with a particular biomass, the actual growth rates increase
linearly. The actual growth decreases linearly when the constrained factor affects the growth rate per cell.
This decrease continues until the system reaches the carrying capacity. At this point, the rate of increase is
zero. And then the death phase is expected with negative growth rate. However, it is very clear that
ecological laws cannot be expected as generalization. In cases where the cell is resistant to the death phase,
it is observed that one or more factors play an important role. For example, the difference in nitrogen
concentrations was not significant in the experimental design (p> 0.05). When the change in nitrogen
constitution is associated with light and temperature changes, it has created significant differences in both
growth rate and nutrient consumption and chlorophyll content.
Keywords: Phytoplankton, Diatom, Microalgae, Environmental factors