Influence of salinity variations on zooplankton community in el-mex bay, alexandria, egypt
MetadataShow full item record
El-Mex Bay receives a heavy load of waste waters (7×109 m3/year) both directly from industrial outfalls and indirectly from Lake Maryuit via El-Mex Pumping Station. Zooplankton samples were collected bimonthly from seven stations during the period March 2005 to January 2006 to illustrate the influence of salinity variations on the abundance and community structure of zooplankton in El-Mex Bay waters. Based on the salinity values, four water types are identified: the mixed land drainage (L) of salinity < 10ppt, mixed water (M) of salinity range 10 to 30ppt, diluted sea water (D) of salinity range 30 to 38.5 ppt and Mediterranean Sea water (S) of salinity > 38.5. The highest zooplankton standing crop (106.6×103 ind/m3) was recorded in the mixed land drainage water type (L); while the lowest counts (5.9×103 ind/m3) was found in the Mediterranean Sea water type (S). Rotifera were the most dominant zooplankton groups in water type (L) constituting about 86% to the total zooplankton and repr.....