Effects of light, temperature, nutrients and salinity on the growth of Cylindrotheca closterium (Ehrenberg) Reimann & J. Lewin, 1964 species isolated from Izmir Bay

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dc.contributor.authorUstun, Merve Betul
dc.contributor.authorBuyukisik, Hasan Baha
dc.date.accessioned2021-05-03T20:38:26Z
dc.date.available2021-05-03T20:38:26Z
dc.date.issued2020
dc.departmentEge Üniversitesien_US
dc.description.abstractCylindrotheca closterium is one of the diatom species that is dominant particularly in spring and summer in Izmir Bay and Aegean Sea. in this study, growth kinetics of Cylindrotheca closterium have been studied under different temperature, light intensity, nutrient concentrations and salinity conditions. Initially, temperature-light experiments were carried out and optimum temperature is determined to be 18 degrees C for this species. Obtained results at 18 degrees C are mu(max) = 1.97 +/- 0.167 d(-1) for the maximum specific growth rate and K-I = 0.048 +/- 0.028 for the half saturation constant. Then, six light intensities (0.9, 0.88, 0.74, 0.46, 0.2, 0.07 *100 mu mol photon/m(2)s) and seven salinity concentrations (5, 10, 15, 20, 25, 30 and 35 %) were investigated on the growth rate of Cylindrotheca closterium under optimum temperature. The specific growth rate has been calculated to be 2.012 d(-1) at 15 % salinity which is determined to be the optimum concentration. Exponential growth rates are obtained in semi-batch culture by measuring Chl a values and corresponded nutrient concentrations which are statistically valid (p<0,05) in regard to Monod equation (mu = mu(max)*S/K-S+S) and mu(max) values, a parameter of Monod equation, are calculated for different concentrations of ammonium, nitrate, reactive phosphate and reactive silica are 2.48 +/- 0.61 d(-1), 1.92 +/- 0.3 d(-1), 2.1 +/- 0.05 d(-1) and 1.97 +/- 0.20 d(-1), respectively. K-S values, which are another parameter of Monod equation, that are obtained for each nutrient are 17.84 +/- 14.4 mu M NH4+-N, 27.3 +/- 19.04 mu M NO3--N, 0.25 +/- 0.04 mu M PO4-P and 0.3 +/- 0.24 mu M Si, respectively. As a result of global warming, temperature is expected to be risen 6 degrees C in 2100 (Hallegraeff, 2010). The impacts of this increase on the growth rate of Cylindrotheca closterium species in Izmir Bay is calculated, considering this scenario. Nitrogen is determined to be the only restricting compound that inhibits growth during 52 weeks by a study that is conducted by Sunlu vd., (2007). Consequently, the growth rate of the species didn't decline under 1.5 d(-1) during this period of time.en_US
dc.identifier.doi10.12714/egejfas.37.2.06
dc.identifier.endpage166en_US
dc.identifier.issn1300-1590
dc.identifier.issn2148-3140
dc.identifier.issn1300-1590en_US
dc.identifier.issn2148-3140en_US
dc.identifier.issue2en_US
dc.identifier.startpage157en_US
dc.identifier.urihttps://doi.org/10.12714/egejfas.37.2.06
dc.identifier.urihttps://hdl.handle.net/11454/70434
dc.identifier.volume37en_US
dc.identifier.wosWOS:000605750600006en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isotren_US
dc.publisherEge Univ, Fac Fisheriesen_US
dc.relation.ispartofSu Urunleri Dergisien_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectLighten_US
dc.subjecttemperatureen_US
dc.subjectsalinityen_US
dc.subjectnutrienten_US
dc.subjectCylindrotheca closteriumen_US
dc.subjectIzmir Bayen_US
dc.titleEffects of light, temperature, nutrients and salinity on the growth of Cylindrotheca closterium (Ehrenberg) Reimann & J. Lewin, 1964 species isolated from Izmir Bayen_US
dc.typeArticleen_US

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