Relationship analysis of N/P ratio and phytoplankton abundance in Ranu Pakis using regression approach

Ranu Pakis is a natural lake that formed by volcanic activity. The lake waters have many benefits including as a source of irrigation, aquaculture, agriculture, and tourism. The activities around Ranu Pakis have the potential to produce organic waste into the waters. High organic waste and nutrients resulted in eutrophication or high abundance of phytoplankton which threatens biodiversity in the lake. Nutrients in the waters consist of N and P. The ratio between N and P affect the composition and abundance of phytoplankton. The purpose of this study was to analyses the relationship between N/P ratios to the abundance of phytoplankton in Ranu Pakis using quintile regression approach. The results of this study indicated that the effect of the N/P ratio was different on various quintile.