There is a lot of information and studies about the biochemical aspects and the molecular bases of
the enzymatic process involved in the synthesis of Polyhydroxyalkanoates (PHAs), as well as in the
polymer degradability and methods for increasing the production at an industrial level. Nevertheless, there is little research related to the ecological factors of the PHAs producer bacteria. For this
reason, the effect of the physicochemical soil variables in the PHAs producer bacteria abundance. In this research, it was established that the PHAs producer bacteria abundance in soils in the Andean
region of Nariño in Colombia is connected with high concentrations of carbon, nitrogen, high capacity
of cation interchange and acid pH. Among the PHAs producer bacteria abundance isolated from soils
in this region, the 71, 1% syntheses Polyhydroxybutyrate and the 28,9% accumulates the copolymer Poly (3hydroxybutyrate-co-3-hydroxyvalerate).