Article
Microbiology
Hanni Vigderovich, Werner Eckert, Marcus Elvert, Almog Gafni, Maxim Rubin-Blum, Oded Bergman, Orit Sivan
Summary: In methane generating sediments, stimulation of aerobic methane oxidation can influence net iron reduction, microbial community changes, and lipid biomarker patterns. Increasing oxygen exposure promotes aerobic methanotrophy, net iron reduction, and the increase of microbes involved in iron recycling. The addition of methanol instead of methane as a substrate for methanotrophs under hypoxia suggests a link between methylotrophic methanogenesis and iron reduction. Inhibition of methanogenesis leads to increased methanol turnover, indicating the role of heterotrophic bacteria.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Microbiology
Angus S. Hilts, Manjot S. Hunjan, Laura A. Hug
Summary: Metagenomic sequencing provides insights into metabolic capacities and taxonomic affiliations of microbial communities. This study adapts occupancy modeling from macroecology to analyze metabolic predictions from metagenomes, showing a positive correlation between methanogenesis and methanotrophy genes across environments. The lack of consistent metadata is identified as a significant obstacle for improving the statistical rigor of metagenomic analyses.
Review
Environmental Sciences
Moshe Gophen
Summary: This article reviews the long-term (1933-2022) record of water level fluctuations in Lake Kinneret and indicates the dependence of its water level management on climate change, dam and National Water Carrier constructions, as well as water availability and domestic supply demands. Short-term maximal decline in water level of 4-6 m and shrinkage of 4.6-6.5% of the lake's total surface area were documented. However, compared to other lakes like Lake Tchad, the Aral Sea, and Lake Sivan, Lake Kinneret's decline in water level is not as significant.
Article
Marine & Freshwater Biology
Jamie Aaron Shapiro, Ehud Spanier, Gideon Gal
Summary: The Lake Kinneret ecosystem has undergone significant changes, with a shift from dinoflagellates to Cyanobacteria as the dominant species. This shift has affected the food habits and interactions of fish species in the lake, such as the Saint Peter's fish and silver carp. The dietary changes, from herbivory to omnivory, have led to competition for limited resources and challenges from Cyanobacterial blooms, requiring modifications in lake management and fisheries.
Article
Geosciences, Multidisciplinary
Harold J. Bradbury, Alexandra Turchyn, Adam Bateson, Gilad Antler, Angus Fotherby, Jennifer L. Druhan, Mervyn Greaves, Duygu S. Sevilgen, David A. Hodell
Summary: The study investigates the coupling of microbial sulfate reduction to organic carbon oxidation in sedimentary pore fluids through carbon and sulfur isotopic composition analysis. Systemic changes in the isotopic composition of dissolved inorganic carbon and sulfate are observed across various marine sediment types, locations, and water depths. A reactive-transport model demonstrates the influence of various factors such as seawater DIC concentration, organic carbon isotopic composition, and methane presence on the isotopic composition of sedimentary pore fluids.
FRONTIERS IN EARTH SCIENCE
(2021)
Review
Environmental Sciences
Sofia L. D'Ambrosio, John A. Harrison
Summary: This article provides a critical review of methods used to estimate the diffusive flux of CH4 from lake sediments, including incubation, benthic chambers, and modeling approaches. The limitations and advantages of each method are discussed, along with published comparisons between different methods. The article also highlights the need for the development and application of new methods to advance understanding of lake CH4 fluxes.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Sigrid van Grinsven, Dimitri V. Meier, Anja Michel, Xingguo Han, Carsten J. Schubert, Mark A. Lever
Summary: This study investigates the factors that control the distribution and activity of methane-oxidizing bacteria (MOB) in lakes. It found that the trophic state and oxygen levels in the sediments play a role in determining the abundance and community composition of MOB. Different types of MOB were found in different sediment layers and water depths.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Environmental Sciences
Vincent Tardy, David Etienne, Laurent Millet, Emilie Lyautey
Summary: Lake ecosystems play a significant role in atmospheric methane levels and may become even larger emitters of methane due to the spread of hypoxia/anoxia in freshwater ecosystems worldwide. A study on Lake Remoray sediment revealed spatial heterogeneity in methane production potential, methane concentration, and the presence of archaeal and bacterial communities. The results showed that methane concentration and production were not necessarily higher in the deeper parts of the lake, as some littoral areas exhibited similar or higher values. The study also identified different methanogenic niches across the lake, indicating the presence of distinct methanogenic sub-communities. Further research is needed to understand the real activities of these sub-communities and their implications for greenhouse gas production and mitigation.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Geography, Physical
Julien Ackerer, Jerome Van der Woerd, Anne Sophie Meriaux, Coralie Ranchoux, Gerhard Schafer, Frederick Delay, Francois Chabaux
Summary: This study analyzes the variability of denudation rates in a mountain watershed using a rare dataset and modeling techniques. The study highlights the importance of high-resolution depth profiles in detecting mobile regolith and understanding its impact on the critical zone evolution. The study also proposes a method to correct denudation rates and reveals that steady state assumptions of Be-10 concentrations and regolith thickness may not necessarily coincide.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Geochemistry & Geophysics
Ellen Lalk, Jeffrey S. Seewald, L. Taras Bryndzia, Shuhei Ono
Summary: By analyzing methane stored in sediments, we can identify its source and evaluate the potential of natural gas reservoirs and subsurface microbial activity. However, the burial and transport of methane can complicate this assessment. In this study, the re-equilibration of methane isotopes along geothermal gradients suggests that the upper temperature limit of microbial methanogenesis in marine sediments may be higher than expected.
ORGANIC GEOCHEMISTRY
(2023)
Article
Environmental Sciences
S. Saarni, T. Soininen, E. Uurasjarvi, S. Hartikainen, S. Meronen, T. Saarinen, A. Koistinen
Summary: The sediment trap method is important for measuring microplastic flux rates into sediments and providing comparable information of the spatial microplastic deposition rates. These data are essential for comparing microplastic pollution rates in different sedimentary systems and for future risk assessments.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
Article
Geochemistry & Geophysics
Shuo Zhang, Donald J. DePaolo, Renjie Zhou, Yuefei Huang, Guangqian Wang
Summary: Predicting mineral-fluid reaction rates in geologic materials is highly uncertain, despite their importance in various applications. The slow calcite-fluid reaction in deep sea carbonate sediments remains poorly understood, as well as the persistence of non-zero rates over millions of years. This study examines pore fluid data from ocean drilling archives to estimate the rates of calcite dissolution and precipitation as a function of depth and sediment age.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Microbiology
Beichen Wang, Jianrong Huang, Jian Yang, Hongchen Jiang, Haiyi Xiao, Jibin Han, Xiying Zhang
Summary: This study revealed that light-dependent bicarbonate uptake by carbon-fixing microbes in saline lakes contributes significantly to total bicarbonate uptake, while dark bicarbonate uptake cannot be ignored. The abundance and population structures of carbon-fixing microbial populations are significantly influenced by various environmental variables, with the cbbL and cbbM genes being negatively correlated with salinity and organic carbon concentration, respectively. This study enhances our understanding of the abundance, diversity, and function of carbon-fixing microbial populations in lakes with a full range of salinity.
FEMS MICROBIOLOGY ECOLOGY
(2021)
Article
Ecology
Michal Elul, Maxim Rubin-Blum, Zeev Ronen, Itay Bar-Or, Werner Eckert, Orit Sivan
Summary: Microbial communities in iron-rich methanic sediments of Lake Kinneret show phylogenetic and functional diversity, with key metabolic reactions being performed by archaea and bacteria, potentially involving electron transfer via transmembrane cytochromes and outer-membrane hexaheme c-type cytochrome (OmcS). Anaerobic oxidizers of methane and denitrifying methanotrophs may mediate anaerobic oxidation of methane (AOM) in these sediments, while potential aerobes also play a role in the oxidation of methane.
Article
Environmental Sciences
Yuan Kong, Huaiyan Lei, Zilian Zhang, Weidong Cheng, Bin Wang, Fulong Pan, Fanfan Huang, Fanli Huang, Wenqing Li
Summary: The study in the Shenhu area in the northern South China Sea revealed significant sulfate reduction and relatively low and irregular methane concentrations in marine sediments. Incubation experiments showed microbial groups potentially involved in AOM and methanogenesis in regions above the sulfate-methane transition zone.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Nadav Knossow, Barak Blonder, Werner Eckert, Alexandra V. Turchyn, Gilad Antler, Alexey Kamyshny
GEOCHEMICAL TRANSACTIONS
(2015)
Article
Chemistry, Analytical
Michal Sela-Adler, Ward Said-Ahmad, Orit Sivan, Werner Eckert, Ronald P. Kiene, Alon Amrani
ENVIRONMENTAL CHEMISTRY
(2016)
Article
Environmental Sciences
Katharina Frindte, Martin Allgaier, Hans-Peter Grossart, Werner Eckert
ENVIRONMENTAL MICROBIOLOGY REPORTS
(2016)
Article
Engineering, Environmental
Itay Bar-Or, Marcus Elvert, Werner Ecker, Ariel Kushmaro, Hanni Vigderovich, Qingzeng Zhu, Eitan Ben-Dov, Orit Sivan
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2017)
Article
Marine & Freshwater Biology
Stefano Amalfitano, Gianluca Corno, Ester Eckert, Stefano Fazi, Shira Ninio, Cristiana Callieri, Hans-Peter Grossart, Werner Eckert
Article
Microbiology
Michal Sela-Adler, Zeev Ronen, Barak Herut, Gilad Antler, Hanni Vigderovich, Werner Eckert, Orit Sivan
FRONTIERS IN MICROBIOLOGY
(2017)
Article
Plant Sciences
W. Eckert, F. Leunert, Y. Z. Yacobi, J. Kohler, E. Kurzbaum
Article
Environmental Sciences
Khoren Avetisyan, Werner Eckert, Alyssa J. Findlay, Alexey Kamyshny
Correction
Environmental Sciences
Khoren Avetisyan, Werner Eckert, Alyssa J. Findlay, Alexey Kamyshny
Article
Multidisciplinary Sciences
M. Bizic, T. Klintzsch, D. Ionescu, M. Y. Hindiyeh, M. Gunthel, A. M. Muro-Pastor, W. Eckert, T. Urich, F. Keppler, H-P Grossart
Article
Ecology
Shira Ninio, Achsa Lupu, Werner Eckert, Ilia Ostrovsky, Yehudit Viner Mozzini, Assaf Sukenik
Summary: In a study of the green sulfur bacterium in Lake Kinneret, Israel, it was found that the photosynthetic community of the DCM region has high diversity, with multiple Chlorobium species present. These species maintain a relatively stable abundance distribution over two consecutive years.
FRESHWATER BIOLOGY
(2021)
Article
Microbiology
Hanni Vigderovich, Werner Eckert, Marcus Elvert, Almog Gafni, Maxim Rubin-Blum, Oded Bergman, Orit Sivan
Summary: In methane generating sediments, stimulation of aerobic methane oxidation can influence net iron reduction, microbial community changes, and lipid biomarker patterns. Increasing oxygen exposure promotes aerobic methanotrophy, net iron reduction, and the increase of microbes involved in iron recycling. The addition of methanol instead of methane as a substrate for methanotrophs under hypoxia suggests a link between methylotrophic methanogenesis and iron reduction. Inhibition of methanogenesis leads to increased methanol turnover, indicating the role of heterotrophic bacteria.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Ecology
Hanni Vigderovich, Werner Eckert, Michal Elul, Maxim Rubin-Blum, Marcus Elvert, Orit Sivan
Summary: The study investigates the anaerobic oxidation of methane (AOM) in Lake Kinneret sediments and reveals the involvement of iron oxides and humic substances as electron acceptors. The AOM process is primarily mediated by methanogens performing reverse methanogenesis. The findings highlight the contrast between naturally anoxic lake sediments and long-term incubations in terms of methane oxidation mechanisms.
Article
Ecology
Michal Elul, Maxim Rubin-Blum, Zeev Ronen, Itay Bar-Or, Werner Eckert, Orit Sivan
Summary: Microbial communities in iron-rich methanic sediments of Lake Kinneret show phylogenetic and functional diversity, with key metabolic reactions being performed by archaea and bacteria, potentially involving electron transfer via transmembrane cytochromes and outer-membrane hexaheme c-type cytochrome (OmcS). Anaerobic oxidizers of methane and denitrifying methanotrophs may mediate anaerobic oxidation of methane (AOM) in these sediments, while potential aerobes also play a role in the oxidation of methane.
Article
Limnology
Jennifer A. Brentrup, Craig E. Williamson, William Colom-Montero, Werner Eckert, Elvira de Eyto, Hans-Peter Grossart, Yannick Huot, Peter D. F. Isles, Lesley B. Knoll, Taylor H. Leach, Chris G. McBride, Don Pierson, Francesco Pomati, Jordan S. Read, Kevin C. Rose, Nihar R. Samal, Peter A. Staehr, Luke A. Winslow
