Relationships between environmental factors and N-cycling microbes reveal the indirect effect of further eutrophication on denitrification and DNRA in shallow lakes

Article Geosciences, Multidisciplinary

Managing nitrogen legacies to accelerate water quality improvement

Nandita B. Basu et al.

Summary: Agricultural nitrogen legacies are causing delays in improving water quality, highlighting the need for comprehensive management strategies to address these issues and ensure better environmental outcomes.

NATURE GEOSCIENCE (2022)

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Article Environmental Sciences

Nitrate as a predictor of cyanobacteria biomass in eutrophic lakes in a climate change context

Fabien Cremona et al.

Summary: The study aimed to predict cyanobacteria biomass and nitrate concentrations in Lake Vortsjarv, Estonia. A model chain combining a mechanistic model and an empirical, generalized linear model was used to achieve this. The models successfully predicted the variations in cyanobacteria biomass and nitrate concentrations, providing results for different scenarios. The findings underscore the significance of reducing anthropogenic pressures on lake catchments to mitigate the proliferation of harmful pollutants and microalgae.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

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Article Engineering, Environmental

Wind induced algal migration manipulates sediment denitrification N-loss patterns in shallow Taihu Lake, China

Wenqing Shi et al.

Summary: This study investigated sediment denitrification N-loss patterns along algal migration pathway in Taihu Lake, where it was found that algal biomass plays a significant role in influencing denitrification N-loss in sediments, with inhibition of N-loss beyond a certain critical threshold.

WATER RESEARCH (2022)

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Article Engineering, Environmental

Dissimilatory nitrate reduction in urban lake ecosystems: A comparison study between closed and open lakes in Chengdu, China

Zhanbiao Yang et al.

Summary: The occurrence, contribution, and mechanism of nitrate reduction in urban closed and open lakes are still unclear. An experimental study was conducted in six urban lakes in Chengdu, China, showing that open lakes had higher rates of nitrate reduction compared to closed lakes, and different bacterial communities played distinct roles in nitrate reduction.

WATER RESEARCH (2022)

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Article Engineering, Environmental

Eutrophication causes microbial community homogenization via modulating generalist species

Mengdie Geng et al.

Summary: This study investigated the effects of eutrophication on microbial community structure in shallow lakes in the Yangtze-Huaihe River basin in China. The results showed that eutrophication led to the homogenization of bacterial and fungal communities in both water and sediments. Physicochemical factors such as water temperature, pH, and heavy metals were found to influence the community structure. Importantly, generalist species were found to play a dominant role in explaining the variations in beta diversity along the trophic gradient.

WATER RESEARCH (2022)

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Article Microbiology

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

Kathrin B. L. Baumann et al.

Summary: The nitrogen cycle is crucial for global ecosystems, and excessive use of nitrogen fertilizers can harm aquatic ecosystems. However, the microbial communities involved in nitrogen removal in freshwater lake sediments are poorly understood. This study investigates the abundance of microbial nitrogen transformation genes in two lakes with contrasting trophic states and demonstrates the importance of understanding the genomic potential for nitrogen transformation in interpreting nitrogen process rates.

MSPHERE (2022)

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Article Environmental Sciences

Effects of submerged vegetation on sediment nitrogen-cycling bacterial communities in Honghu Lake (China)

Haoping Wu et al.

Summary: The study investigated the effects of submerged vegetation (SV) on sediment nitrogen-cycling bacterial communities in Honghu Lake, China. Results showed that SV influenced the diversity and abundance of bacterial communities by improving water quality and sediment properties. The study also revealed the negative impact of high C:N ratio on specific bacterial assemblages.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Environmental Sciences

Effects of drift algae accumulation and nitrate loading on nitrogen cycling in a eutrophic coastal sediment

Wei Wen Wong et al.

Summary: The study investigated the impact of nitrogen pollution on permeable sediments dominated by the world's coastlines and continental shelves, finding that drift algae biomass and nitrate exposure significantly influence nitrogen cycling. Presence of drift algae dramatically increased DNRA and N2O production, while nitrate treatment led to decreases in both and an increase in denitrification. These findings suggest new feedbacks between eutrophication and greenhouse gas emissions.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Engineering, Environmental

Active DNRA and denitrification in oxic hypereutrophic waters

Elias Broman et al.

Summary: Since the introduction of synthetic fertilizers over a hundred years ago, coastal oceans have faced increasing nutrient loading, resulting in eutrophication and extensive algal blooms. Studies show that in a large hypereutrophic lagoon, both dissimilatory nitrate reduction to ammonium (DNRA) and denitrification processes are active, with DNRA playing a crucial role in recycling fixed nitrogen in the ecosystem.

WATER RESEARCH (2021)

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Article Environmental Sciences

DNRA was limited by sulfide and nrfA abundance in sediments of Xiamen Bay where heterotrophic sulfide-producing genus (Pelobacter) prevailed among DNRA bacteria

Xiaowen Li et al.

Summary: DNRA rates in Xiamen Bay were influenced by sulfide, organic carbon, nrfA gene abundances, and DNRA bacteria community. The main phyla of DNRA bacteria were Bacteroidetes and Proteobacteria, with Pelobacter being the dominant genus. Additionally, the correlation analysis showed positive relationships between DNRA rate, nrfA abundance, environmental factors such as nitrite, total organic carbon, acid volatile sulfide, and total nitrogen.

JOURNAL OF SOILS AND SEDIMENTS (2021)

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Article Environmental Sciences

Dynamic behavior of sediment resuspension and nutrients release in the shallow and wind-exposed Meiliang Bay of Lake Taihu

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SCIENCE OF THE TOTAL ENVIRONMENT (2020)

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Article Engineering, Environmental

Water Depth Underpins the Relative Roles and Fates of Nitrogen and Phosphorus in Lakes

Boqiang Qin et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2020)

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Article Engineering, Environmental

The nitrogen reduction in eutrophic water column driven by Microcystis blooms

Yingshi Shen et al.

JOURNAL OF HAZARDOUS MATERIALS (2020)

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Article Environmental Sciences

Denitrification and dissimilatory nitrate reduction to ammonium in freshwater lakes of the Eastern Plain, China: Influences of organic carbon and algal bloom

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SCIENCE OF THE TOTAL ENVIRONMENT (2020)

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Article Engineering, Environmental

Algal Accumulation Decreases Sediment Nitrogen Removal by Uncoupling Nitrification-Denitrification in Shallow Eutrophic Lakes

Lin Zhu et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2020)

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Article Engineering, Environmental

Hotspot of dissimilatory nitrate reduction to ammonium (DNRA) process in freshwater sediments of riparian zones

Shanyun Wang et al.

WATER RESEARCH (2020)

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Article Microbiology

Can We Use Functional Genetics to Predict the Fate of Nitrogen in Estuaries?

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FRONTIERS IN MICROBIOLOGY (2020)

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Contrast diversity patterns and processes of microbial community assembly in a river-lake continuum across a catchment scale in northwestern China

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Article Engineering, Environmental

Role of algal accumulations on the partitioning between N2 production and dissimilatory nitrate reduction to ammonium in eutrophic lakes

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WATER RESEARCH (2020)

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Editorial Material Multidisciplinary Sciences

ENVIRONMENT Nitrogen in the environment

Carly J. Stevens

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Editorial Material Multidisciplinary Sciences

Why Lake Taihu continues to be plagued with cyanobacterial blooms through 10 years (2007-2017) efforts

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SCIENCE BULLETIN (2019)

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Role of organic carbon, nitrate and ferrous iron on the partitioning between denitrification and DNRA in constructed stormwater urban wetlands

Md Moklesur Rahman et al.

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Article Microbiology

The DNRA-Denitrification Dichotomy Differentiates Nitrogen Transformation Pathways in Mountain Lake Benthic Habitats

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Biotic factors drive distinct DNRA potential rates and contributions in typical Chinese shallow lake sediments

Yunmeng Pang et al.

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Widespread global increase in intense lake phytoplankton blooms since the 1980s

Jeff C. Ho et al.

NATURE (2019)

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The secretion of organics by living Microcystis under the dark/anoxic condition and its enhancing effect on nitrate removal

Xuechu Chen et al.

CHEMOSPHERE (2018)

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Review Microbiology

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Biological and chemical factors driving the temporal distribution of cyanobacteria and heterotrophic bacteria in a eutrophic lake (West Lake, China)

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APPLIED MICROBIOLOGY AND BIOTECHNOLOGY (2017)

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Evidence for the Importance of Atmospheric Nitrogen Deposition to Eutrophic Lake Dianchi, China

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Fermentative Bacteria Influence the Competition between Denitrifiers and DNRA Bacteria

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Nutrient limitation dynamics examined on a multi-annual scale in Lake Taihu, China: implications for controlling eutrophication and harmful algal blooms

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Refined NrfA Phylogeny Improves PCR-Based nrfA Gene Detection

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Linking DNRA community structure and activity in a shallow lagoonal estuarine system

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Reassessing PCR primers targeting nirS, nirK and nosZ genes for community surveys of denitrifying bacteria with DGGE

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Relationships between environmental factors and N-cycling microbes reveal the indirect effect of further eutrophication on denitrification and DNRA in shallow lakes

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