The relationship with N/P ratio to phytoplankton abundance in mangrove Wonorejo waters, Rungkut, Surabaya, East Java

Abstract

Abstract The abundance of phytoplankton in water depends on the availability of nutrients. Nitrogen and phosphorus are two parameters that affect water. Phytoplankton require the elements of nitrate and phosphate in the production of fats and proteins. Nitrate and phosphate in water can be influenced by household waste discharges originating from residential areas around mangroves. The Wonorejo mangrove waters area is the estuary of an industrial waste journey. This study was conducted to determine the relationship of the N/P ratio to the abundance of phytoplankton in the Mangrove Waters of Wonorejo, Rungkut, Surabaya, East Java. Sampling was done at three stations with two replications. Identification or observation using a microscope. The results found that the most dominant class is the Bacillariophyceae consisted of two genus. Whereas the other classes found consisted of two genus Dynophyceae, one Clorophyceae, Coscinodiscophyceae, Fragilariophyceae and Cynophyceae. The results of the regression-correlation analysis showed a correlation coefficient of 0.885, meaning that the relationship obtained with an N / P ratio with an abundance of phytoplankton was very strong. The abundance of phytoplankton is influenced by the concentration of nitrogen and phosphate at 78.3% while the other 21.7% is influenced by physical and chemical factors of other waters.