Papers by Sezgi Adalioglu
Zenodo (CERN European Organization for Nuclear Research), Apr 30, 2023
Mediterranean Marine Science, Mar 28, 2020
A unicellular marine microalga, Entomoneis sp. was isolated and studied as had become the dominan... more A unicellular marine microalga, Entomoneis sp. was isolated and studied as had become the dominant species compared to other bacillariophyta species in different environmental fluctuations in Izmir Bay. In effort to better understand the dynamics of this microalga that has achieved unprecedented domination, we conducted a monoculture isolation study. In this study, experiments were planned within the annual range of the Izmir Bay temperature, and the demonstrated behavior of the species in light and nutrient conditions. The stock culture medium was illuminated by approximately 50μmol photons m-2 s-1 of illumination with 14/24 daylight. The temperature of the climate chamber was set at the summer (T1 (21±1 o C)), spring (T2 (17±1 o C)) and winter (T3 (13±1 o C)) temperatures of Izmir Bay. Experiments were also conducted with four different light intensities (L1 (50 μmol photons m-2 s-1), L2 (25 μmol photons m-2 s-1), L3 (5 μmol photons m-2 s-1) and L4 (dark)). In this context, nutrient measurements were made on samples of the exponential, stationary and death phase of the culture and nutrient analyses were carried out. The results, which were designed according to ceteris paribus assumptions, were adapted to Michaelis-Menten kinetics. Consequently, considering the lifetime of the diatom at different temperature conditions, T3 was determined as an optimum temperature. Maximum growth rate and process time were observed at this temperature. This explains why these diatoms are abundant available in the winter. Once the light intensity was increased, the growth rate was increased at the T1 and T2 temperatures. However, T3 had a high growth rate at nearly L1 light intensity. Considering the consumption and transformation of different nutrient conditions, different results for both types of microalgae were obtained.
Journal of Earth System Science, Feb 1, 2007
Mediterranean Marine Science, 2020
A unicellular marine microalga, Entomoneis sp. was isolated and studied as had become the dominan... more A unicellular marine microalga, Entomoneis sp. was isolated and studied as had become the dominant species according to other bacillariophyta species in different environmental fluctuations in Izmir Bay. Because of our effort to better understand the dynamics of this microalga that facilitates unprecedented domination, we conducted on a monoculture isolation study.In this study, experiments were planned with the annual range of the Izmir Bay temperature, and the demonstrated behavior of the species in light and nutrient conditions. The stock culture medium was illuminated by approximately 50μmol photons m-2s-1 of illumination with 14/24 daylight. The temperature of the climate chamber was set on the summer (T1 (21±1oC)), spring (T2 (17±1oC)) and winter (T3 (13±1oC)) of Izmir Bay. Experiments were also applied with four different light intensities (L1 (50 μmol photons m-2s-1), L2 (25 μmol photons m-2s-1), L3 (5 μmol photons m-2s-1) and L4 (dark)). In this context, nutrient measuremen...
Present study is to assess the comparative effects of nutrient enrichment within Gerence Bay such... more Present study is to assess the comparative effects of nutrient enrichment within Gerence Bay such a semi-enclosed bay in the Aegean Sea. Water samples were taken in spring seasons (April 2006-2007) and autumn seasons (October 2005-2006) and enriched with nutrients of various concentrations. By applying T test to determine statistical differences between the averages of growth rate. While no difference at the 0.05 level of relevance was observed between the October periods, it was seen that the growth rates of NH4 + NO3 and PO4 -3 for the April periods were different (tc=6.62, 9.69, 5.2; df= 19, 18,17 respectively). A season-based study of the growth rates across time, these were higher than 3 (1/day) in October and lower than 2 in the month of April. Experiments show that the environment may exhibit eutrophic sea conditions in the case of certain nutrients, but characteristics of an oligotrophic environment in the case of others. Consequently, it would be more apt to say that Gerenc...
The light transmission and seiche depth of Izmir Bay, western Turkey
Izmir Bay is one of the most polluted estuaries in the whole Mediterranean Sea. The inner part of... more Izmir Bay is one of the most polluted estuaries in the whole Mediterranean Sea. The inner part of the Bay (Inner Bay) is heavily affected by domestic and industrial discharge. As a result of these loads, strong eutrophication occurs in the Inner Bay, which is temporally anaerobic. The ecologically sensitive approach of the local authorities during the last decade has given rise to a wide variety of monitoring and research studies on this bay. On the other hand, the municipality of Izmir started to operate wastewater treatment facilities since January 2000. The Institute of Marine Sciences and Technology – Izmir (IMST) with its research vessel R/V K Piri Reis has been conducting an intensive monitoring program since 1988 and especially during the recent few years. These investigations provide an opportunity for the evaluation of the performance of the wastewater treatment plant in terms of the change in the optical properties of Izmir Bay water in a positive manner. The turbidity val...
Microplankton growth in response to nutrient enrichments in Gerence Bay, Izmir, Western Turkey
Indian Journal of Geo-Marine Sciences
http://nopr.niscair.res.in/bitstream/123456789/24825/1/IJMS%2042%287%29%20859-867.pdf Present stu... more http://nopr.niscair.res.in/bitstream/123456789/24825/1/IJMS%2042%287%29%20859-867.pdf Present study is to assess the comparative effects of nutrient enrichment within Gerence Bay such a semi-enclosed bay in the Aegean Sea. Water samples were taken in spring seasons (April 2006-2007) and autumn seasons (October 2005-2006) and enriched with nutrients of various concentrations. By applying T test to determine statistical differences between the averages of growth rate. While no difference at the 0.05 level of relevance was observed between the October periods, it was seen that the growth rates of NH4+ NO3-and PO4-3 for the April periods were different (tc=6.62, 9.69, 5.2; df= 19, 18,17 respectively). A season-based study of the growth rates across time, these were higher than 3 (1/day) in October and lower than 2 in the month of April. Experiments show that the environment may exhibit eutrophic sea conditions in the case of certain nutrients, but characteristics of an oligotrophic envi...
Mediterranean Marine Science, 2021
A unicellular marine microalga, Entomoneis sp. was isolated and studied as had become the dominan... more A unicellular marine microalga, Entomoneis sp. was isolated and studied as had become the dominant species compared to other bacillariophyta species in different environmental fluctuations in Izmir Bay. In effort to better understand the dynamics of this microalga that has achieved unprecedented domination, we conducted a monoculture isolation study. In this study, experiments were planned within the annual range of the Izmir Bay temperature, and the demonstrated behavior of the species in light and nutrient conditions. The stock culture medium was illuminated by approximately 50μmol photons m-2 s-1 of illumination with 14/24 daylight. The temperature of the climate chamber was set at the summer (T1 (21±1 o C)), spring (T2 (17±1 o C)) and winter (T3 (13±1 o C)) temperatures of Izmir Bay. Experiments were also conducted with four different light intensities (L1 (50 μmol photons m-2 s-1), L2 (25 μmol photons m-2 s-1), L3 (5 μmol photons m-2 s-1) and L4 (dark)). In this context, nutrient measurements were made on samples of the exponential, stationary and death phase of the culture and nutrient analyses were carried out. The results, which were designed according to ceteris paribus assumptions, were adapted to Michaelis-Menten kinetics. Consequently, considering the lifetime of the diatom at different temperature conditions, T3 was determined as an optimum temperature. Maximum growth rate and process time were observed at this temperature. This explains why these diatoms are abundant available in the winter. Once the light intensity was increased, the growth rate was increased at the T1 and T2 temperatures. However, T3 had a high growth rate at nearly L1 light intensity. Considering the consumption and transformation of different nutrient conditions, different results for both types of microalgae were obtained.
Growth Rate in ,Response to pH Levels and Different Size Fraction of Plankton in İzmir Bay
Identification of character attributes in marine coastal waters is very important to sustainabili... more Identification of character attributes in marine coastal waters is very important to sustainability, especially in enclosed areas with restricted exchange. The aim of this study is to assess the comparative effects of pH within Cost of İzmir Bay. Water samples were taken in June 2014 and rain water were taken the following day. In order to determine algal growth in ecosystems, the effect of different pH range and different size on the growth rate were studied . Rain water pH was 8.11. Diatoms and dinoflagellates were monitored from the samples. That why experiments were performed under non-nutrient limited conditions (L1+ Si medium) with different pH (7.5, 8.26, 8. 80). Each day, in_vivo chl_a measurements were made from incubated bioassay bottles at under a 16:8 light/dark cycle and 21± 1oC temperature. The obtained data was plotted as growth curves and chl_a based exponential growth rates were calculated. Growth rates as functions of pH concentrations were fitted to monod equation...
Journal of Earth System Science, 2007
Izmir Bay is one of the most polluted estuaries in the whole Mediterranean Sea. The inner part of... more Izmir Bay is one of the most polluted estuaries in the whole Mediterranean Sea. The inner part of the Bay (Inner Bay) is heavily affected by domestic and industrial discharge. As a result of these loads, strong eutrophication occurs in the Inner Bay, which is temporally anaerobic. The ecologically sensitive approach of the local authorities during the last decade has given rise to a wide variety of monitoring and research studies on this bay. On the other hand, the municipality of Izmir started to operate wastewater treatment facilities since January 2000. The Institute of Marine Sciences and Technology -Izmir (IMST) with its research vessel R/V K Piri Reis has been conducting an intensive monitoring program since 1988 and especially during the recent few years. These investigations provide an opportunity for the evaluation of the performance of the wastewater treatment plant in terms of the change in the optical properties of Izmir Bay water in a positive manner. The turbidity values measured in these monitoring studies indicate that the values have changed drastically after January 2000. Their spatial variation indicates that the values decrease from the Inner Bay towards the Aegean Sea. The turbidity (light transmission) values are measured with an automatic CTD (conductivity, temperature and depth) system during each cruise. The seiche disc depth measurement is carried out only occasionally. The accuracy of the seiche disc depth is dependent on certain daylight conditions and depends on the operator. The seiche disc depth (D s ) is an important parameter to estimate primary production of organic matter (hereafter called production). A relation between light transmission (turbidity) value and seiche disc depth (D s ) is found with very good agreement. The correlations are very high (approximately 0.94) with slight seasonal variation. to be a pioneering work which studies the optical properties, i.e., light transmission and seiche disc depth of Izmir Bay.
Journal of Earth System Science, 2007
Izmir Bay is one of the most polluted estuaries in the whole Mediterranean Sea. The inner part of... more Izmir Bay is one of the most polluted estuaries in the whole Mediterranean Sea. The inner part of the Bay (Inner Bay) is heavily affected by domestic and industrial discharge. As a result of these loads, strong eutrophication occurs in the Inner Bay, which is temporally anaerobic. The ecologically sensitive approach of the local authorities during the last decade has given rise to a wide variety of monitoring and research studies on this bay. On the other hand, the municipality of Izmir started to operate wastewater treatment facilities since January 2000. The Institute of Marine Sciences and Technology -Izmir (IMST) with its research vessel R/V K Piri Reis has been conducting an intensive monitoring program since 1988 and especially during the recent few years. These investigations provide an opportunity for the evaluation of the performance of the wastewater treatment plant in terms of the change in the optical properties of Izmir Bay water in a positive manner. The turbidity values measured in these monitoring studies indicate that the values have changed drastically after January 2000. Their spatial variation indicates that the values decrease from the Inner Bay towards the Aegean Sea. The turbidity (light transmission) values are measured with an automatic CTD (conductivity, temperature and depth) system during each cruise. The seiche disc depth measurement is carried out only occasionally. The accuracy of the seiche disc depth is dependent on certain daylight conditions and depends on the operator. The seiche disc depth (D s ) is an important parameter to estimate primary production of organic matter (hereafter called production). A relation between light transmission (turbidity) value and seiche disc depth (D s ) is found with very good agreement. The correlations are very high (approximately 0.94) with slight seasonal variation. to be a pioneering work which studies the optical properties, i.e., light transmission and seiche disc depth of Izmir Bay.
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Papers by Sezgi Adalioglu