Results 11 to 20 of about 165,557 (154)

Microbial methane oxidation efficiency and robustness during lake overturn

Limnology and Oceanography Letters, 2021
Many seasonally stratified lakes accumulate substantial amounts of the greenhouse gas methane in the anoxic zone. Methane oxidizing bacteria in the water column act as a converter, oxidizing methane into carbon dioxide and biomass before it reaches the ...
M. Zimmermann, M. J. Mayr, H. Bürgmann, W. Eugster, T. Steinsberger, B. Wehrli, A. Brand, D. Bouffard   +7 more
doaj   +1 more source

Penetrative Convection Modifies the Dynamics of Downslope Gravity Currents

Geophysical Research Letters, 2023
Gravity currents contribute to the transport of heat and mass in atmospheric and aquatic environments. In aquatic systems subject to daily surface cooling, gravity currents propagate through turbulent convective surroundings.
T. Doda, H. N. Ulloa, C. L. Ramón, A. Wüest, D. Bouffard   +4 more
doaj   +1 more source

Interplay of community dynamics, temperature, and productivity on the hydrogen isotope signatures of lipid biomarkers [PDF]

Biogeosciences, 2017
The hydrogen isotopic composition (δ2H) of lipid biomarkers has diverse applications in the fields of paleoclimatology, biogeochemistry, and microbial community dynamics.
S. N. Ladd, S. N. Ladd, N. Dubois, N. Dubois, C. J. Schubert, C. J. Schubert   +5 more
doaj   +1 more source

Accounting for surface waves improves gas flux estimation at high wind speed in a large lake [PDF]

Earth System Dynamics, 2021
The gas transfer velocity (k) is a major source of uncertainty when assessing the magnitude of lake gas exchange with the atmosphere. For the diversity of existing empirical and process-based k models, the transfer velocity increases with the level of ...
P. Perolo, B. Fernández Castro, B. Fernández Castro, N. Escoffier, T. Lambert, D. Bouffard, M.-E. Perga   +6 more
doaj   +1 more source

Environmental and Microbial Interactions Shape Methane-Oxidizing Bacterial Communities in a Stratified Lake

Frontiers in Microbiology, 2020
In stratified lakes, methane-oxidizing bacteria (MOB) are strongly mitigating methane fluxes to the atmosphere by consuming methane entering the water column from the sediments.
Carole Guggenheim, Carole Guggenheim, Remo Freimann, Magdalena J. Mayr, Magdalena J. Mayr, Karin Beck, Bernhard Wehrli, Bernhard Wehrli, Helmut Bürgmann   +8 more
doaj   +1 more source

Coupling remote sensing and particle tracking to estimate trajectories in large water bodies

International Journal of Applied Earth Observations and Geoinformation, 2022
Propelled by the rapid development of equipment, technology and computational power, the monitoring and simulation of the hydrodynamics in lakes have steadily advanced.
Chaojie Li, Daniel Odermatt, Damien Bouffard, Alfred Wüest, Tamar Kohn   +4 more
doaj   +1 more source

Lake mixing regime selects apparent methane oxidation kinetics of the methanotroph assemblage [PDF]

Biogeosciences, 2020
In lakes, large amounts of methane are produced in anoxic sediments. Methane-oxidizing bacteria effectively convert this potent greenhouse gas into biomass and carbon dioxide.
M. J. Mayr, M. J. Mayr, M. Zimmermann, M. Zimmermann, J. Dey, B. Wehrli, B. Wehrli, H. Bürgmann   +7 more
doaj   +1 more source

Diazotrophic Cyanobacteria are Associated With a Low Nitrate Resupply to Surface Waters in Lake Tanganyika

Frontiers in Environmental Science, 2021
In Lake Tanganyika, blooms of nitrogen-fixing (diazotrophic) cyanobacteria emerge, when the upper water column re-stratifies after a period of upwelling and convective mixing.
Benedikt Ehrenfels, Benedikt Ehrenfels, Maciej Bartosiewicz, Maciej Bartosiewicz, Athanasio Stephano Mbonde, Kathrin B.L. Baumann, Kathrin B.L. Baumann, Christian Dinkel, Julian Junker, Julian Junker, Tumaini M. Kamulali, Ismael A. Kimirei, Ismael A. Kimirei, Robert Niederdorfer, Daniel Odermatt, Francesco Pomati, Emmanuel A. Sweke, Emmanuel A. Sweke, Bernhard Wehrli, Bernhard Wehrli   +19 more
doaj   +1 more source

Optical remote sensing of large-scale water pollution in Angola and DR Congo caused by the Catoca mine tailings spill

International Journal of Applied Earth Observations and Geoinformation, 2023
Billions of tons of hazardous mine waste are stored in thousands of tailings storage facilities around the world. These impoundments represent one of the most important environmental risk factors of industrial mining, since occasional tailings spills or ...
Désirée Ruppen, James Runnalls, Raphael M. Tshimanga, Bernhard Wehrli, Daniel Odermatt   +4 more
doaj   +1 more source

Estimation of deep infiltration in unsaturated limestone environments using cave lidar and drip count data [PDF]

Hydrology and Earth System Sciences, 2016
Limestone aeolianites constitute karstic aquifers covering much of the western and southern Australian coastal fringe. They are a key groundwater resource for a range of industries such as winery and tourism, and provide important ecosystem services such
K. Mahmud, G. Mariethoz, A. Baker, P. C. Treble, M. Markowska, E. McGuire   +5 more
doaj   +1 more source