Bacterial and archaeal communities in sediments from the two eutrophic hydropower reservoirs Palmar and Rincon del Bonete, located in the Rio Negro, Uruguay
This study examined the activity, distribution, and dynamics of methanogenic and methanotrophic communities in the sediments of six sites from two nearby eutrophic hydroelectric reservoirs in South America. Three sites were sampled in each reservoir: one near the dam and two in nearby arms within a radius no greater than 20 km from the dam. Sites from Bonete reservoir are named Dam, Cardozo and Carpinteria. Sites from Palmar reservoir are named Dam, Vera and Arroyo Grande. Sampling was conducted in 2022, in early autumn (March 28-31) and late spring (December 6-9). Samples consist of the upper 5 cm of sediment and 10 cm of the water column above the sediment mixed to obtain a slurry with which the analyses were performed.