Model Matematika Populasi Plankton dan Konsentrasi Nitrogen

摘要: Abstract – Phytoplankton and zooplankton have a major impact on the marine ecosystem because plankton is main food chain in ecosystem. However, this plankton’s concentration changes influenced by nitrogen concentrations. This study began making mathematical model based variables , parameters assumptions that been determined. Next step are finding analyze an equilibrium point. Mathematical populations form of non-liner differential equation system. dinamical system two points ie where without point plankton. The stability can be viewed from condition, first when has one planktonthen will stable. Second, then only result show population phytoplankton, not disappear long term. Keywords Nitrogen, plankton,