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  **If we combine the total OTUs present in the planktonic communities at each timepoint we note that our study shows X OTUs. This is (Lower - Higher) than the Besemer study and....*** CP-R    communities were completely separate  While there are only a few studies that link the abundance of attempt to compare  biofilm community composition and the overlyng planktonic community abundance, those studies that have, have found community composition among the two habitats often overlapp little to not at all (Besemer 2007, Besemer 2012, Jackson 2001, Lyautey et al. 2005). This is consistent with our findings in this experimental system with a natural marine planktonic source commmunity. Our study also evaluates algal community composition which showed a similar result suggesting that both the algal and bacterial biofilm communities are form from phylogenetically unique organisms that exist in low abundance in surrounding habitat but are readily enriched in the biofilm lifestyle.