The results of this study demand the rejection of the null hypothesis. The factors: size of substrate, river velocity, and overstory density contribute to persistence of bryophytes on rock substrate at riverbanks. The highest biomass values were found on large rocks or patches. Higher river velocity is associated with decreased rates of growth and colonization of bryophytes. A denser canopy cover promotes colonization and growth of bryophytes.
Further research is needed to include more sites in order to confirm these trends. Due to the limited amount of time this study had to be restricted at only two sites.