In a recent separate investigation focused on polymer manipulation during PHA accumulations, population dynamics of the same biomass source during accumulation tests were examined (Janarthanan, 2014). Janarthanan examined the active growth during accumulations and observed a selective shift in community structure that was distinct from the feast-famine enrichment biomass production population dynamics. Therefore, the growth of PHA storing organisms during accumulation processes may be in itself a selection process in adaptation to the feedstock and the feeding strategy. Janarthanan's findings find extension of support in other recent work wherein P-limitation was used in a batch suspended growth process to promote enrichment of the PHA-phenotype in a mixed culture biomass (Cavaille et al., 2013). The growth of specific populations of species during an accumulation process suggest a kind of robustness of plasticity for adaptation by MMC enrichment cultures to feedstocks that are distinct from those used to produce the biomass in the first place. Therefore, promoting a growth response during an accumulation process is also a means to further exploit the biomass and its potential for adaptation due to an availability of diversity in the community structure.