| structure and seasonal dynamics of hyporheic zone microbial communities in free-stone rivers of the western united states. | the hyporheic zone of a river is characterized by being nonphotic, exhibiting chemical/redox gradients, and having a heterotrophic food web based on the consumption of organic carbon entrained from surface waters. hyporheic microbial communities constitute the base of food webs in these environments and are important for maintaining a functioning lotic ecosystem. while microbial communities of rivers dominated by fine-grained sediments are relatively well studied, little is known about the struc ... | 2003 | 14708745 |