Tintinnina (Ciliophora) and Foraminifera in plankton of hypersaline Lagoon Bardawil (Egypt): spatial and temporal variability

Authors : Gamal M ELSHABRAWY, Elena V ANUFRIIEVA, Nickolai V SHADRIN

Pages : 218-229

View : 15 | Download : 5

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Lagoon Bardawil, belonging to the few hypersaline lagoons in the Mediterranean Sea, is located in the middle of the Sinai coast. Composition, distribution, and seasonal dynamics of large planktonic tintinnids and foraminifera at 12 stations in the lagoon were studied in 2009 and 2010. Fifteen species of Ciliophora insert ignore into journalissuearticles values(Tintinnina); and two species of Foraminifera were identified. The occurrence of different species varied greatly in the study period: two species were found in 42% to 49% of all samples, two species in 21% to 23%, 4 species in 10% to 20%, and 10 species in 1% to 5%. Only three species were found throughout the year. The average total number of all recorded protozoa varied from 2333 ind./m 3 ` role=`presentation`> 3 insert ignore into journalissuearticles values(spring); to 13,733 ind./m 3 ` role=`presentation`> 3 insert ignore into journalissuearticles values(winter);: Tintinnina from 1250 ind./m 3 ` role=`presentation`> 3 insert ignore into journalissuearticles values(spring); to 12,867 ind./m 3 ` role=`presentation`> 3 insert ignore into journalissuearticles values(winter); and Foraminifera from 200 ind./m 3 ` role=`presentation`> 3 insert ignore into journalissuearticles values(autumn); to 1083 ind./m 3 ` role=`presentation`> 3 insert ignore into journalissuearticles values(spring);. The distribution of total abundance of tintinnids and foraminifers in the lagoon area was close to random in summer and spring; during autumn and winter, it was aggregated. Tintinnid and foraminifera studies in Lagoon Bardawil were carried out previously insert ignore into journalissuearticles values(1985-2010);; summarizing all data, it was found that interannual differences may be explained by stochastic causes and nondirected climate fluctuations.
Keywords : Tintinnina, Foraminifera, hypersaline lagoon, species composition, long term changes, Mediterranean Sea