Abstract
Urbanization and seasonality strongly influence the bacterial composition of the soil. However, aquatic environments such as rivers are understudied owing to their high dynamics and therefore rules relating to more static habitats such as lentic or terrestrial environments may be limited. Here, we compared the spatiotemporal patterns of bacterioplankton communities in the Zhangxi river along a gradient of urbanization using 16S ribosomal DNA identification. The alpha and beta diversity of bacterioplankton showed no significant response to watershed urbanization. A significant difference in predicted functional profiles of the bacterioplankton community was also revealed between the wet and dry seasons. The bacterioplankton community assembly was driven by both deterministic and stochastic processes. Stochasticity was one of the most vital processes affecting the bacterioplankton communities in both wet and dry seasons, explaining over 50% variation in the community by the null model analysis. Bacterioplankton co-occurrence patterns in the river changed with the seasons. More notably, the composition of bacterioplankton communities was inconsistent with alternations of the spatial distance offering meaningful implications for interactions between zero-radius operational taxonomic units and the dynamics of the bacterioplankton communities in surface water. In summary, we found clear patterns of seasonal variations in the bacterioplankton community structures.
Highlights
Bacterioplankton plays a key role in global biogeochemical cycles of riverine ecosystems due to their high abundance and turnover rates (Zhu et al, 2017)
This study aimed to 1) quantify the alpha diversity of the bacterioplankton communities across the seasons and the changes along two sorts of urbanization areas, as determined by the percentage of impervious cover; 2) recognize the spatial and environmental factors that explain the changes in bacterioplankton community compositions; 3) quantify the beta diversity, zero-radius operational taxonomic unit (ZOTU), and their co-occurrence patterns across the seasons and two sorts of urbanization areas; and 4) analyze the ecological process of the community assembly
The shift in bacterioplankton community composition was found to be strongly related to seasonal variations
Summary
Bacterioplankton plays a key role in global biogeochemical cycles of riverine ecosystems due to their high abundance and turnover rates (Zhu et al, 2017). Seasonality Outweighs the Urbanization to habitat change (Hanson et al, 2012) These major mechanisms are often exposed to seasonal variations or urban stress (Fortunato et al, 2013; Reese et al, 2016; Huber et al, 2020; Liu et al, 2020), highlighting the significance of understanding the response of bacterioplankton diversity and community composition to seasonal variations or urban stress in the watershed microbial ecological systems, as well as the possible link between the bacterioplankton community and heterogeneous habitats.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
