Effect of Industrial Pollution on the Formation of Vegetation South of Jeddah Province (Saudi Arabia)

In this research, Wechose study area in the industrial area south of Jeddah province and another area away from the factories was chosen as the control. One location were selected in each of them. each covering (10m 10m) inside each area we take 10 small quadrates (1m 1m) were also taken. We have defined plant species. Plant density, Plant frequency, Plant coverage and important value of plants were calculated. The results showed there were 5 plant species. And the highest relative density and frequency to the plant Stipagrostispulmosaat a location 1. while thehighest value of the relative coverage recorded in plant Zygophyllum simplex in location 2. And important value was highest in Zygophyllum simplex in location 2 and was highest in Stipagrostispulmosain location 1. It was observed that the density, frequency and coverage of most of the plants were higher at the Location 2 which is far away from factories. Indicating that industrial pollution has a negative impact on the formation of the vegatation.