Spatial-Temporal Variation of Bacterial Communities in Sediments in Lake Chaohu, a Large, Shallow Eutrophic Lake in China

Abstract

Sediment bacterial communities are critical for the circulation of nutrients in lake ecosystems. However, the bacterial community function and co-occurrence models of lakes have not been studied in depth. In this study, we observed significant seasonal changes and non-significant spatial changes in the beta diversity and community structure of sediment bacteria in Lake Chaohu. Through linear discriminant analysis effect size (LEfSe), we observed that certain taxa (from phylum to genus) have consistent enrichment between seasons. The sudden appearance of a Firmicutes population in spring samples from the Zhaohe River, an estuary of Lake Chaohu, and the dominance of Firmicutes populations in other regions suggested that exogenous pollution and environmental induction strongly impacted the assembly of bacterial communities in the sediments. Several taxa that serve as intermediate centers in Co-occurrence network analysis (i.e., Pedosphaeraceae, Phycisphaeraceae, Anaerolineaceae, and Geobacteraceae) may play an important role in sediments. Furthermore, compared with previous studies of plants and animals, the results of our study suggest that various organisms, including microorganisms, are resistant to environmental changes and/or exogenous invasions, allowing them to maintain their community structure.

Impact of Rocky Desertification Control on Soil Bacterial Community in Karst Graben Basin, Southwestern China

“…Chthoniobacterales are very common in soils ( Sangwan et al, 2004 ) and can make rapid responses to changes in the availability of substrates and oxygen in soil ( Hirsch et al, 2017 ). Pedosphaeraceae has been identified as an important species in soil biogeochemical cycle, yet a better understanding of their roles in soil bacterial co-occurrence networks is still needed in the future ( Zhang et al, 2019 ). However, a recent study revealed that Bryobacter , GR-WP33-30, and Rhizomicrobium were the keystone karst bacteria in Fuyuan County, Yunnan Province ( Xue et al, 2017 ).…”

Planktonic and Benthic Bacterial Communities of the Largest Central European Shallow Lake, Lake Balaton and Its Main Inflow Zala River

“…However, in the first phylum, unknown members of the methanogenic Anaerolineaceae family (3-3.7%), while in the latter, unknown members of the Pedosphaeraceae family were detectable in a significant amount. These two families were widely distributed in the benthic communities of a large shallow eutrophic lake in China [53].…”

Community Composition and Spatial Distribution of N-Removing Microorganisms Optimized by Fe-Modified Biochar in a Constructed Wetland

“…Fortunately, a high-throughput sequencing (HTS) approach can provide a more accurate analysis of the denitrifier community in complex ecosystems. To date, this analysis has been widely used to investigate denitrifier communities in various ecosystems, such as lake water and sediment, soil, and river periphytic biofilms [ 31 , 32 , 33 , 34 ]. However, there is still a lack of studies on applying the HTS approach to investigate the denitrifier community in CWs.…”