Alot of literatures has shown data about the life cycle of haematococcus pluvialis but as far as we know, no one presented the effect of drying up effect on cyst formation of the H. pluvialis. An experiment was made to test the effect of drying up on the green alga haematococcus pluvialis as environmental stress. Measurement of nutrients was tested to show the effect of nutrients depletion on cyst formation. The aim or our work was to study the life cycle of haematococcus pluvialis including cyst formation modeling the drying up of a habitat as an occurring phenomenon in the environment.