Freshwater ecosystems are the largest natural source of the greenhouse gas methane (CH), with shallow lakes a particular hot spot. Eutrophication and warming generally increase lake CH emissions but their impacts on the sole biological methane sink-methane oxidation-and methane-oxidizer community dynamics are poorly understood. We used the world's longest-running freshwater climate-change mesocosm experiment to determine how methane-oxidizing bacterial (MOB) abundance and composition, and methane oxidation potential in the sediment respond to eutrophication, short-term nitrogen addition and warming. After nitrogen addition, MOB abundance and methane oxidation potential increased, while warming increased MOB abundance without altering methane oxidation potential. MOB community composition was driven by both temperature and nutrient availability. Eutrophication increased relative abundance of type I MOB Methyloparacoccus. Warming favoured type II MOB Methylocystis over type I MOB Methylomonadaceae, shifting the MOB community from type I dominance to type I and II co-dominance, thereby altering MOB community traits involved in growth and stress-responses. This shift to slower-growing MOB may explain why higher MOB abundance in warmed mesocosms did not coincide with higher methane oxidation potential. Overall, we show that eutrophication and warming differentially change the MOB community, resulting in an altered ability to mitigate CH emissions from shallow lakes.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9723669 | PMC |
http://dx.doi.org/10.1038/s43705-021-00026-y | DOI Listing |
ACS Appl Mater Interfaces
November 2024
State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China.
In response to the current policy of high storage capacity, two-dimensional (2D) materials have revealed promising prospects as high-performance electrode materials. MoB, as a type of such material, is widely regarded as an anode candidate for Li-ion batteries due to its large specific surface area and abundant ion diffusion channels; the long-term cycling stability, however, is poor owing to material pulverization during the cycle. Therefore, MoB/SiN heterojunction in this work is proposed as an anode material, with SiN acting as a skeleton, maintaining the stability of the structure, while retaining the high energy storage properties of MoB as well.
View Article and Find Full Text PDFRecent Pat Biotechnol
September 2024
CSIR-URDIP (Council of Scientific & Industrial Research - Unit for Research & Development of Information Products), S.No. 113 & 114, NCL Estate, Pashan Road, Pune 411008, Maharashtra.
Methane-oxidizing bacteria (MOB) or methanotrophs are a category of bacteria that rely on methane as their primary carbon and energy source. Methane is the second most abundant greenhouse gas after carbon dioxide and is comparatively far more potent in trapping heat in the atmosphere. MOBs are important microorganisms in the global carbon cycle where they play a crucial role in the oxidation of methane.
View Article and Find Full Text PDFMicrobiol Spectr
November 2024
Department of Microbiology and Biotechnology, Max Rubner-Institut, Federal Research Institute for Nutrition and Food, Kiel, Germany.
Unlabelled: In this study, the genomes of 22 isolates from fresh produce and herbs obtained from retail markets in northern Germany were completely sequenced with MiSeq short-read and MinION long-read sequencing and assembled using a Unicycler hybrid assembly. The data showed that 17 of the strains harbored between one and five plasmids, whereas in five strains, only the circular chromosomal DNA was detected. In total, 38 plasmids were identified.
View Article and Find Full Text PDFInt J Antimicrob Agents
September 2024
Catalan Institute for Water Research (ICRA-CERCA), Girona, Spain. Electronic address:
Objective: This study aimed to explore the abundance and diversity of antibiotic resistance genes (ARGs) in seahorses (Hippocampus barbouri and Hippocampus comes) and their surrounding environment.
Methods: A combination of shotgun metagenomics and bioinformatics was used to investigate the resistome of both seahorse species.
Results: The analyses demonstrated a higher abundance of ARGs in seahorse-associated microbiomes, particularly in skin and gut samples, compared to those from water and sediment.
Front Microbiol
July 2024
Department of Geosciences, National Taiwan University, Taipei, Taiwan.
Methane-oxidizing bacteria (MOB) is a group of planktonic microorganisms that use methane as their primary source of cellular energy. For tropical lakes in monsoon Asia, there is currently a knowledge gap on MOB community diversity and the factors influencing their abundance. Herewith, we present a preliminary assessment of the MOB communities in three maar lakes in tropical monsoon Asia using Catalyzed Reporter Deposition, Fluorescence In-Situ Hybridization (CARD-FISH), 16S rRNA amplicon sequencing, and pmoA gene sequencing.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!