Microbial Nitrogen Transformation Potential in Sediments of Two Contrasting Lakes Is Spatially Structured but Seasonally Stable

Baumann, Karl; Thoma, Raoul; Callbeck, Cameron M.; Niederdorfer, Robert; Schubert, Carsten J.; Müller, Beat; Lever, Mark A.; Bürgmann, Helmut

doi:10.1128/msphere.01013-21

Cited by 11 publications

(6 citation statements)

References 84 publications

(147 reference statements)

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“…Deinococci , a group of bacteria known as Hadobacteria ( 43 ), have been found in greater abundance in La Punta at the isolated points and La Brava at the main points, indicating that the characteristics of these microorganisms are not out of the range reported in other studies. This phylum is distinguished by being polyextremophile; it includes several species that are resistant to the lethal effect of ionizing radiation and UV light ( 57 ) and is also known for its ability to degrade nuclear waste ( 58 ).…”

Section: Discussionmentioning

confidence: 76%

“…One interesting component of the microbiota composition in the La Punta–La Brava system lake is the presence of Archaea, such as Thermoplasmatota and Crenarchaeota , belonging to the phylum Euryarchaeota ( 43 ). This phylum was present in other sediment lake studies in Canada ( 44 ) and Switzerland ( 45 ) and has been found in previous studies in soils of the same area related to native vegetation ( 46 ).…”

Section: Discussionmentioning

confidence: 99%

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Compositional Changes in Sediment Microbiota Are Associated with Seasonal Variation of the Water Column in High-Altitude Hyperarid Andean Lake Systems

et al. 2023

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In this study, we analyzed the persistence of the water column through satellite images and physicochemical characterization to investigate the composition and diversity in High Andean Lake Systems in a hyperarid environment. In addition to the persistence of the water column, this approach can be used to analyze changes in the morphology of saline accumulations and persistence of snow or ice; for example, for establishing variable plant cover over time and evaluating the microbiota associated with soils with seasonal changes in plants.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Compositional Changes in Sediment Microbiota Are Associated with Seasonal Variation of the Water Column in High-Altitude Hyperarid Andean Lake Systems

et al. 2023

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“…Various studies have applied metagenomes to explore environmentally relevant genes and annotated the function with KEGG [65,66]. Previous studies have shown that rivers and lakes are important sites for the removal of imported nitrogen from the terrestrial environment [67][68][69]. The abundance of denitrification genes is significantly related to water quality and sediment properties [70].…”

Section: Discussionmentioning

confidence: 99%

Effects of Different Types of Human Disturbance on Total and Nitrogen-Transforming Bacteria in Haihe River

Chen

et al. 2022

Life

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Haihe River is the largest water system in North China and is injected into the Bohai Sea in Tianjin City. In this study, different types of human disturbance (urban sewage, industrial pollution, ship disturbance) were selected from the upper reaches of Haihe river Tianjin section down to the estuary that connected with Bohai Sea for evaluation. By metagenomic sequencing, the effects of different types of disturbances on bacteria communities in Haihe sediments were studied, with a special focus on the function of nitrogen-cycling bacteria that were further analyzed through KEGG comparison. By analyzing the physical and chemical characteristics of sediments, results showed that human disturbance caused a large amount of nitrogen input into Haihe River, and different types of human disturbance led to distinct spatial heterogeneity in different sections of Haihe River. The bacteria community was dominated by Proteobacteria, followed by Chloroflexi, Bacteroidetes, Actinobacteria and Acidobacteria. The relative abundance of each phylum varied at different sites as a response to different types of human disturbances. In nitrogen cycling, microorganisms including nitrogen fixation and removal were detected at each site, which indicated the active potential for nitrogen transformation in Haihe River. In addition, a large number of metabolic pathways relating to human diseases were also revealed in urban and pollution sites by function potential, which provided an important basis for the indicative role of urban river ecosystem for public health security. In summary, by evaluating both the ecological role and function potential of bacteria in Haihe River under different types of human disturbance, the knowledge of microorganisms for healthy and disturbed river ecosystems has been broadened, which is also informative for further river management and bioremediation.

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“…Each pathway of the N-cycling process is completed by the enzyme encoded by the corresponding functional gene using the corresponding substrate catalysis ( Broman et al, 2021 ). However, the abundance and diversity of N-cycling functional genes in lake ecosystems are greatly different due to different water quality (such as water temperature, and nitrogen to phosphorus ratio) ( Basu et al, 2022 ), hydrological conditions (such as lake water exchange cycle) ( Stoliker et al, 2016 ; Li et al, 2021 ) and seasons ( Baumann et al, 2022 ). Therefore, it is of great significance to explore the changes of N-cycling functional genes in lakes and their influencing factors in different seasons.…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes in N-cycling functional genes in sediments and their influencing factors in a typical eutrophic shallow lake, China

Zhang,

Bai,

Zhai

et al. 2024

Front. Microbiol.

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N-cycling processes mediated by microorganisms are directly linked to the eutrophication of lakes and ecosystem health. Exploring the variation and influencing factors of N-cycling-related genes is of great significance for controlling the eutrophication of lakes. However, seasonal dynamics of genomic information encoding nitrogen (N) cycling in sediments of eutrophic lakes have not yet been clearly addressed. We collected sediments in the Baiyangdian (BYD) Lake in four seasons to explore the dynamic variation of N-cycling functional genes based on a shotgun metagenome sequencing approach and to reveal their key influencing factors. Our results showed that dissimilatory nitrate reduction (DNRA), assimilatory nitrate reduction (ANRA), and denitrification were the dominant N-cycling processes, and the abundance of nirS and amoC were higher than other functional genes by at least one order of magnitude. Functional genes, such as nirS, nirK and amoC, generally showed a consistent decreasing trend from the warming season (i.e., spring, summer, fall) to the cold season (i.e., winter). Furthermore, a significantly higher abundance of nitrification functional genes (e.g., amoB, amoC and hao) in spring and denitrification functional genes (e.g., nirS, norC and nosZ) in fall were observed. N-cycling processes in four seasons were influenced by different dominant environmental factors. Generally, dissolved organic carbon (DOC) or sediment organic matter (SOM), water temperature (T) and antibiotics (e.g., Norfloxacin and ofloxacin) were significantly correlated with N-cycling processes. The findings imply that sediment organic carbon and antibiotics may be potentially key factors influencing N-cycling processes in lake ecosystems, which will provide a reference for nitrogen management in eutrophic lakes.

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Microbial Nitrogen Transformation Potential in Sediments of Two Contrasting Lakes Is Spatially Structured but Seasonally Stable

Abstract: Anthropogenic nitrogen (N) inputs can lead to eutrophication in surface waters, especially in N-limited coastal ecosystems. Lakes effectively remove reactive N by transforming it to N 2 through microbial denitrification or anammox.

Cited by 11 publications

References 84 publications

Compositional Changes in Sediment Microbiota Are Associated with Seasonal Variation of the Water Column in High-Altitude Hyperarid Andean Lake Systems

Compositional Changes in Sediment Microbiota Are Associated with Seasonal Variation of the Water Column in High-Altitude Hyperarid Andean Lake Systems

Effects of Different Types of Human Disturbance on Total and Nitrogen-Transforming Bacteria in Haihe River

Seasonal changes in N-cycling functional genes in sediments and their influencing factors in a typical eutrophic shallow lake, China

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