Distribution of viruses along the trophic gradient in the Central Adriatic

U radu je prikazana brojnost virusa, brojnost heterotrofnih bakterija, udijeli HNA i LNA grupa u ukupnom broju heterotrofnih bakterija te omjer virusa i bakterija na četiri postaje duţ trofičkog gradijenta Kaštelanski zaljev-Stončica. Cilj rada je utvrditi sezonsku i vertikalnu raspodjelu virusa koristeći metodu protočne citometrije te utjecaj biotičkih i abiotičkih parametara na raspodjelu virusa. Brojnosti virusa na istraţivanom području iznosile su od 1,11 x 106 mL -1 do 8,26 x 106 mL -1 . Virusna brojnost opada udaljavanjem od obale odnosno duţ trofičkog gradijenta. Sezonske promjene virusne brojnosti su pratile promjene bakterijske brojnosti, analizirajući HNA i LNA grupe bakterija utvrĎeno je da virusi koreliraju s obje skupine bakterija neovisno o sadrţaju nukleinske kiseline.The number of viruses, heterotrophic bacteria, the contribution of HNA and LNA in a total number of heterotrophic bacteria, and the ratio of virus and bacteria in four stations along trophic gradient Kaštela bay- Stončica is shown in this paper. The main goal is to determine the seasonal and vertical distribution of the virus using flow cytometry. Additionally, the potential influence of biotic and abiotic parameters on viral distribution is studied. The virus numerosity in studied area was from 1,11 x 106 mL-1 to 8,26 x 106 mL-1. Viral abundance decreases with distance from the coast or along the trophic gradient. Seasonal changes in viral abundance were followed by changes in bacterial abundance, analyzing HNA and LNA groups of bacteria found that viruses correlated with both groups of bacteria regardless of nucleic acid content