Spatial Variation and Environmental Parameters Affecting the Abundant and Rare Communities of Bacteria and Archaea in the Sediments of Tropical Urban Reservoirs

Author(s)

Pierangeli, Gabrielle Maria Fonseca ; Domingues, Mercia Regina ; Choueri, Rodrigo Brasil ; Hanisch, Werner Siegfried ; Gregoracci, Gustavo Bueno ; Benassi, Roseli Frederigi

• Document type: Journal article
• Source: MICROBIAL ECOLOGY; v. N/A, p. 14-pg., 2022-05-24.

Abstract

Microbial communities in freshwater sediments play an important role in organic matter remineralization, contributing to biogeochemical cycles, nutrient release, and greenhouse gases emissions. Bacterial and archaeal communities might show spatial or seasonal patterns and were shown to be influenced by distinct environmental parameters and anthropogenic activities, including pollution and damming. Here, we determined the spatial variation and the environmental variables influencing the abundant and rare bacterial and archaeal communities in the sediments of eutrophic-hypereutrophic reservoirs from a tropical urban area in Brazil. The most abundant microbes included mainly Anaerolineae and Deltaproteobacteria genera from the Bacteria domain, and Methanomicrobia genera from the Archaea domain. Microbial communities differed spatially in each reservoir, reflecting the establishment of specific environmental conditions. Locations with better or worst water quality, or close to a dam, showed more distinct microbial communities. Besides the water column depth, microbial communities were affected by some pollution indicators, including total phosphorus, orthophosphate, electrical conductivity, and biochemical oxygen demand. Distinct proportions of variation were explained by spatial and environmental parameters for each microbial community. Furthermore, spatial variations in environmental parameters affecting these communities, especially the most distinct ones, contributed to microbial variations mediated by spatial and environmental properties together. Finally, our study showed that different pressures in each reservoir affected the sediment microbiota, promoting different responses and possible adaptations of abundant and rare bacterial and archaeal communities. (AU)

• FAPESP's process: 18/20417-7 - Relation between limnological variables (abiotic and biotic) and seasonality in CH4 and CO2 gas fluxes in fluvial regions of the Billings and Guarapiranga dams (São Paulo - SP)
• Grantee: Nicolas Pereira Andrade
• Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training
• FAPESP's process: 19/23767-1 - Relationship between limnological variables (abiotic and biotic) and seasonality in the flow of CH4 and CO2 gases in fluvial regions of the Billings and Guarapiranga dams (São Paulo - SP)
• Grantee: Joice Teixeira Silva Rodrigues
• Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training
• FAPESP's process: 17/10355-1 - Relation between limnological variables (abiotic and biotic) and seasonality in CH4 and CO2 gas fluxes in the fluvial regions of the Billings and Guarapiranga dams (São Paulo - SP)
• Grantee: Roseli Frederigi Benassi
• Support Opportunities: Regular Research Grants