In the upper atmosphere (ionosphere), plasma with two electron populations is very common. The cold electrons (\(T_{e}\sim 1\) eV) usually originate in the ionosphere, while the hot electrons (\(T_{e}\sim 100\) eV) come from the magnetosphere. In addition to these two electron populations, there may be a beam of electrons streaming along the magnetic field lines. These electrons are responsible for exciting various electrostatic wave modes. In this article, we provide a systematic insight in the evolution of the system based on the beam energy.