Factor driving heterotrophic dinoflagellate in relation to environment conditions in Kerkennah Islands(eastern coast of Tunisa)  

作　　者：Mounir Ben Brahim Morsi Feki Wafa Feki-Sahnoun Mabrouka Mahfoudi Asma Hamza 

机构地区：[1]Faculty of Sciences of Sfax,Road of Soukra km 4,BP 802-3038 Sfax,Tunisia [2]National Institute of Sciences and Technologies of the Sea,Center of Sfax-BP 1035-CP.3018.Sfax,Tunisia

出　　处：《Journal of Coastal Life Medicine》2015年第9期686-690,共5页海岸生命医学杂志（英文版）

基　　金：Supported by the Faculty of Sciences,Sfax,Tunisia.

摘　　要：Objective:To study the seasonal variability of heterotrophic dinoflagellate in the station of Cercina(southern coast of Tunisia).Methods:Sampling was done in 2007 in Cercina station located in the western coast of Kerkennah(34°41'27''N;11°07'45''E)(Southern Tunisia).Three replicates of water samples were taken during 10 days of each month.Environmental variables and nutrients were measured in situ.Results:A significant seasonal difference was observed for temperature and water salinity.The highest values were observed in spring and summer.No significant seasonal difference was,however,detected for nitrite,nitrate,ammonia,silica and phosphate.Sixty-five species of dinoflagellate were identified in the station of Cercina.Abundance of dinoflagellates fluctuated between seasons with values showing a significant seasonal and monthly difference.The highest mean abundance was recorded in spring in April,while the lowest abundance was detected in December in winter.Protoperidinium granii was the main species contributing to the dissimilarity between spring and winter with 13.98%followed by Peridinium sp.with 12.5%of dissimilarity and by Polykrikos sp.with 10.58%.Conclusions:Heterotrophic dinoflagellates proliferate in spring and summer.This increase was justified by the nutrient availability.Protoperidinium granii and Polykrikos kofoidii were the main heterotrophic dinoflagellate making difference between seasons and their densities were positively correlated with both temperature and salinity.

关 键 词：Heterotrophic dinoflagellate Variability SEASONAL Kerkennah Tunisia 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]